4th Primary Science Final Revision 2025 PDF

The Genius in Science Final Revision th 4 Primary First term Prepared by Dr. Dina Abdul Tawab 01128970995 1 Write the scientific term: 1. It is a characteristic that helps of living organisms survive and reproduce in the ecosystem (Adaptation). 2. It is...

The Genius in Science Final Revision th 4 Primary First term Prepared by Dr. Dina Abdul Tawab 01128970995 1 Write the scientific term: 1. It is a characteristic that helps of living organisms survive and reproduce in the ecosystem (Adaptation). 2. It is a type of adaptation, which hides animals from predators or their prey by blending in with the surrounding environments (Camouflage). 3. Type of reptiles live in the desert protects itself by keeping itself cool by finding shaded area during a hot sunny day (Starred agama lizard). 4. Birds live in Antarctica that is one of the coldest places on the Earth (Penguin) 5. It is a change in the structure of the animal's body to adapt in its environment (Structural adaptation). 6. It is a change in behaviors of the animals to adapt in its environment (Behavioral adaptation) 7. Travelling of some animals long distances at certain time of the year(Migration) 8. Structural adaptation in mangrove tree, that resist the water waves (Long strong roots). 9. Plant grows in desert and It has sharp spines to prevent animals eat its leaves and fruits (Barbary fig). 10. Type of tree produces a poison that makes the leaves taste very bad (Acacia tree). 11. System is responsible for breaking down (changing) food into small parts(Digestive system). 12. It is the process of changing food into chemical substances (small pieces) to get the body energy (Digestion process). 13. Organ is responsible for absorbs water from the undigested food (wastes) through rectum, then eject these wastes outside the body through anus (Large intestine). 14. It is the process of pulling the air carrying oxygen gas into the body and pushing the air carbon dioxide gas and water vapor out the body (Respiration process). 15. System carries out breathing (respiration) process (Respiratory system). 16. It is the process by which, air rich in oxygen gas enters two lungs(Inhalation). 17. It is the process by which, air rich in carbon dioxide gas expelled out two lungs(Exhalation) 18. A gas which humans and fish must get rid of during respiration process (Carbon dioxide gas). 19. Organ in fish that allow it to breathe under water (Gills). 20. It is the reflection (bouncing off) of sound waves back from a solid surface to its source (Echo). 21. Animal uses five senses to distinguish between things (Monkey). 22. Animals can look for their food at night by using their super senses(Nocturnal animals). 23. Nerves that lie in different places of the body and are responsible for receiving information from the environment (Sensory receptors). 24. System consists of three main parts the brain, spinal cord, and nerves (Nervous system). 25. It is the time taken by an organism's body to react to different stimuli around it (Reaction time). 2 26. Animal is a species of rodents and live in desert with very large ears, small eyes and long hind legs (Egyptian jerboa). 27. A system sends this information from the sensory organs to the brain through the nerves to be processed and transmit it to all the body parts (Nervous system) -A system that works inside the body to keep the organism away from danger(Nervous system) 28. An organ in the human body that can distinguish between the taste of honey and milk (Tongue). 29. An organ is responsible for processing sound waves coming through ears (Brain). 30. A wild cat hunts during the nighttime, as the structure of its eyes helps it to find its prey in the dark (Fishing cat). 31. It is something that gives off its own light (Source of light). 32. A tool humans uses it to allow them seeing in the dark (Night vision goggle). 33. Celestial body can reflect the sun light falling in its surface and not considered a source of light (Moon). 34. A structure in nocturnal animals' eyes open wider than humans that helps them to see in low light (Pupil). 35. They are animals that become active at night to look for their food(Nocturnal animals). 36. It is a visible form of energy that travels in the form of light waves (Light) 37. They are objects that allow light to pass through (Transparent objects). 38. They are objects that don't allow light to pass through (Opaque objects). 39. Animals can communicate with each other by singing under water (Humpback whales). 40. It is a pattern that has meaning (Code) 41. Simple device used by blind people to walk safely (The special cane of blind people). 42.A system that works with the eyes of living organisms for seeing objects(Nervous system) 43.The property that animals depend on determine the location of other living organisms or objects through the sound reflected from them (Echolocation) 44.They are messages sent by the nervous system that are often so fast that you can’t realize them (Reflexes) 45.The main control center of the body (Brain) 46.It carries messages from the brain to the body parts and vice versa (Spinal cord) 47.They carry message from the brain to the spinal cord and other parts of the body and vice versa (Nerves) 48. A wild cat hunts during the nighttime, as the structure of its eyes helps it to find its prey in the dark (Fishing cat). 49. It is something that gives off its own light (Source of light). 50. A tool humans use to allow them to see in the dark (Night vision goggle). 51. The Celestial body can reflect the sunlight falling on its surface and not considered a source of light (Moon). 52. It is membrane that reflects light allowing the fishing cat’s eyes to collect more light (Mirror- like membrane) 53. Ants send smelly message to alert the ants where to find food (Nurse ants) 3 54. Ants are responsible for locating food (Scout ants) 55.Ants use smelly message to communicate if there is dander nearby (Soldier ants) 56. It is a visible form of energy that travels in the form of light waves (Light) 57.It sends codes in the form of flashes of light tell sailors where they are (Lighthouse) 58. Simple device used by blind people to walk safely (The special cane for blind people). 59.A type of surface that reflects light in different directions (Rough surface). 60.A type of surface that reflects light in one direction in the same angle (Smooth surface) 61. An animal that flies and can’t see clearly in the dark and depend on the bouncing of sound to catch its prey and to move (Bat) 62.An animal rely on echolocation to find food and it lives in water (Dolphin) 63.They are messages sent by the nervous system that are often so fast that you can’t realize them (Reflexes) 64.It is any change in the position of an object relative to fixed starting point (Motion) 65.It is the force that pulls objects down toward the Earth (Gravity) 66.It is push or pull that is applied to object causes to change its position (Force) 67.It is force that is exerted when objects rub against each other (Friction force) 68.It is the ability to do work or make change (Energy) 69.It is force that causes an object to move distance (Work) 70.It is the amount of energy that stored in object due to its position (Potential energy) 71.It is energy of object due to its motion (Kinetic energy) 72.It is distance that object travels in certain amount of time (Speed) 73.It is distance per unit of time (Speed) 74.It is the bumping or crashing of two objects into each other (Collision) 75.Ball is used to collide with walls of building to help construction workers knock down walls (Wrecking ball) 76.The force you can do to move object away from you (Pushing force) 77. The force you can do to move object towards you (Pulling force) Complete the following statements: 1.The shockwave truck has three jet engine, so it move faster than normal truck. 2.There are two forces that causes objects to move are pulling force and pushing force. 3.The measuring unit of speed are m/sec and km/hr 4.The measuring unit of distance are meter and kilometer, while measuring unit of time are second and hour 6.Gravitional potential energy and chemical energy are considered forms of potential energy. 7. Factors affecting the potential energy of an object are mass and height. 8.The kinetic energy of moving objects depends on mass and speed. 9.Sound energy, light energy, electrical energy, and thermal energy are forms of kinetic energy. 10.Animals such as polar bear, dark bear and panther chameleon can blending in with environment to hide from preys by using camouflage. 11.Scientists classify energy into potential energy and kinetic energy. 12.Seat belts and airbags are from safety equipment’s that is used in cars. 4 13.Airbages are used to slow down the speed of the driver’s motion and absorb energy of passengers on collision. 14.Thermal energy produced due to friction between the string and other parts of Newton’s cradles during collision. 15.By increasing the force, mass and speed of an object, it kinetic energy increases. 16. Raise the thumb up or lower it down a kind of code 17. People use fire to communicate over distances of many kilometers by using the sense of sight. 18. Humpback whales communicate with each other through a sense hearing, while fireflies beetles use the sense of sight to communicate with others. 19. The type of adaptation that is responsible for changing the pattern of lighting up in firefly beetle is behavioral adaptation. 20. Humans can communicate using language and can use codes to transmit (transfer) information. 21.Some of kinetic energy in Newton’s cradle changed into other forms of energy such as sound energy and thermal energy. 22.Light travel in straight lines. 23.When the roller coaster reaches at highest point it stored potential energy that change into kinetic energy when it moves down the hill. 24.Engineer installed three parachutes in shockwave truck to help slow down it quickly. 25.By increasing the numbers of fire extinguisher, the speed of the cart will increase, and it will move large distance. 26. Human and animals use different ways to communicate with each other’s such as sound, light, and movement 27.If there are balanced forces act on object, it will not move, while if there are unbalanced forces act on object, it will move. 28. The voice of women is example of high-pitched sound. 29. Opaque objects always form shadow because the light rays either bounce off or are absorbed. 30. Dolphin and bat use echolocation property to locate their preys. 31. Ants can communicate with each other by their sense of smell. 32. Humpback whales sing during winter months in mating season. 33..Friction always slow down motion of moving object and its direction opposite direction of motion. 34. Fireflies beetles produce a chemical reaction inside their bodies that allow them to communicate with each other. 35. Firefly beetles produce different patterns of flashlight by using their wings to warn from predators or to attract a mate to reproduce. 36.Some motion is hard to see as rotation of Earth around sun. 37. Nurse ants send smelly messages to scout ant when the food is low, while soldier ants send smelly messages to communicate if there is danger nearby. 38.Eye is the organ that we can use to receive light. 5 39.The brain is the main control center in the body. 40. The blind person’s and bat emit high-pitched sound that bounces off objects forming echo. 41.The sense of hearing allows you to notice noise. 42. The ear sends a signal through the nerves, the signal goes to the brain, and you interpret that sound as the chirping of a bird. 43.In winter, the songs of humpback whales have high pitched sounds that travel better through cold water in mating season. 44.In summer, the songs of humpback whales have low pitched sound that travel better through warm water in feeding season. 45.There are message sent from and to the brain automatically, like signal to breathe 46. Light and sound are travel in form of waves 47.Humpback whales sing under water to communicate with each other, where they sing a wide range of tones and series of songs. 48.The eye pupil of humans opens narrower, while the eye pupil of fishing cat opens wider to allow more light to enter their eyes. 49. Bull sharks live in fresh water and salt water. 50.The leaves of pine tree is look like needles to prevent losing of water. 51. The bull shark can sneak up on prey using a camouflage strategy called countershading 52.Lizards are reptiles that are an ancient type of animals. 53.The kapok tree has hand shaped leaves, while acacia tree has tiny leaves. 54.Dolphins and bats use the echolocation property that help them to locate their preys. Put (√) or (x): 1. The blood vessels coming upwards from the penguin's feet carry warm blood ( ). 2. Penguins can adapt to live in extreme cold environment by having feathers and fat in their feet ( ) 3. Polar bear has a dark fur to blend in with the snow ( ). 4. The migration of birds to search for food is considered a form of behavioral adaptation ( ). 5. Some types of lizards have colorful scales that make them hard to see among the rocks ( ). 6. Caracal and fennec fox have sandy-colored fur (tan-colored fur) to help them hide and blend in with desert landscapes ( ). 7. Foxes have a strong sense of hearing ( ). 8. The fur that some animals possess to protect them from the cold is behavioral adaptation ( ). 9. Chameleon eyes move in opposite directions ( ) 10. Arctic foxes live in burrows to stay warm at night and this considered structural adaptation ( ). 11. Fennec fox has extra-large ears that help the fennec fox to lose the heat to cool its body ( ). 12.Small intestine completes the digestion of different types of food and absorbs the nutrient( ). 13.Digestive system and respiratory system are working together to get energy from food and breathing ( ). 14.Large intestine is a tube starts from the end of the stomach and ends with the anus ( ) 15. The trachea branches in two lungs into two tubes that called two bronchi ( ). 6 16. At the end of bronchioles there are air sacs called alveoli, which surrounds by blood vessels ( ). 17. The diaphragm muscle contract and move down during exhalation ( ). 18. The air rich in carbon dioxide gas during inhalation ( ). 19. The respiration process includes two processes inhalation and exhalation ( ). 20. Human can restore ecosystems by replanting the cleared forests ( ). 21. Water pollution affects fish, but doesn't affect humans and plants ( ). 22. Both human and fish need food and carbon dioxide gas to get energy ( ). 23. From the function of the nervous system Collects information from inside and outside the body( ). 24. All parts of the nervous system are working together to perceive and interpret information ( ). 25. The skin is the sensory organ that makes you feel the smoothness of the cloth ( ). 26.The rainforest is characterized by strong winds. Savanah characterized by leakage of water ( ). 27. The kapok tree invites bats to come visit its delicious flowers and it has fluffy yellow seeds ( ). 28. Owls have senses of hearing and touch to be able to find their preys in the dark( ). 29. Dogs have very sharp senses of hearing and smell; they can use in guarding ( ). 30. The Egyptian mongoose makes sounds that spread information to other mongooses( ). 31. The brain is main control center of the body( ). 32. Nerves transmit information from sensory organs to the brain in the form of electrical impulses( ). 33. Mammals as human, elephant and dog have the same structure of nervous system( ). 34. Owls have bowl – shaped faces and can turn heads in all directions ( ). 44. The jerboa has short hind legs to help jump long distances( ). 45. The jerboa hops in zigzag paths( ). 46. The Egyptian jerboa is tiny animal with very small ears, large eyes and long hind legs ( ). 47.The ears of arctic fox are larger than fennec fox ( ) 48. Jerboa is a species of rodents and live in desert ( ). 49.The mirror – like membrane is found in front of fishing cat’s eyes is structural adaptation( ) 50.We can see things through opaque objects, but we can’t see things through transparent objects ( ) 51. Shiny and smooth materials reflect light better than rough surface ( ) 52. We can determine the sound pitch by smelling sense ( ) 53.The moon is a source of light, as it reflects sunlight ( ) 54. The brain is responsible for processing information ( ) 55. Owl has a bowl shaped face that specialized heat feathers to pick up and amplify distance sound ( ) 56. Speaking and writing are ways to communicate with people ( ) 57. Both human and animal need light to see ( ) 58. Fireflies is type of beetles ( ) 7 59.The Fireflies are wingless( ) 60. Animals communicate with each other by using different senses ( ) 61. The sight sense can be performed by eyes and brain ( ) 62.Sight is from five senses, which helps humans and animals to see the surrounding( ) 63.The sense of sight in bats is stronger than owls ( ) 64. Your sense of hearing allows you to see the light of flashlight ( ) 65.Your sense of touch allows you to feel the heat of stove ( ) 66.The eye is the organ of feeling that allow you to taste the bitterness of lemon ( ) 67. Some ants live in colonies of thousands ( ) 68. Nurse ants send smelly messages to scout ants if the food is high ( ) 69. Ants have developed systems that help them divided their work ( ) 70. The nurse’s ants use smells to communicate if there is danger nearby ( ). 71. Each group of colony of ants have same roles ( ) 72.The eyes pupils of nocturnal animal open wider than human’s eyes pupils ( ) 73.Humans can hear high-pitched sound that produced from bat or the special cane ( ) 74. The echo that is picked up by special cane of blind people it turn into vibration ( ) 75.The brain is connected to the spinal cord( ) 76.Humpback whales sing under water to communicate with each other ( ) 77.Dogs use smell and sight senses for recognizing friends, while it use senses of hearing and smell for guarding ( ) 78.Energy can be stored and change from one form to another ( ) 79. Egyptian mongooses making sounds to communicate with each other ( ) Choose the correct answer: 1. Adaptations include changes that……………....in the environment a. reduce chances of survival b. reduce life span for individuals c. improve species survival d. reduce reproduction process 2. What is adaptation? a. The process by which new species appear b. Feature owned by living things to help them survive c. A form of pollination for trees d. ) A process of getting rid of harmful substances in living things 3. What happens to living things that can't adapt to the conditions of its environment ? a. their number increases b. they can't stay in the environment c. keep their number constant d. they can survive in the environment 4. Penguin's feet have blood vessels that bring …….up from its feet towards its body. a- cold blood b- warm blood c- cold water d- warm water 5. Which of these examples of hiding or a camouflage? a. Camel broad feet b. Camel hump c. Powerful parrot wings d. the fox is golden like its environment 8 6. Eagle is bird of prey (who eats meat). Its beak is strong and sharp. This structural adaptation helps it to……………………… a. ripping meat b. escape c. see d. find a shelter 7. Which would die if it could not adapt to environmental change? a. a rock b. a car c. an apple tree d. a glass 8. ………….panting to lower her body temperature. a- Whales b- Lions c-Foxes d- Bats 9. All the following are organs of digestive system except…………. a. trachea b. stomach c. small intestine d. esophagus 10. During swallowing the food, throat (pharynx) pushes the food into a tube called ……………………… a. esophagus b. stomach c. rectum d. large intestine 11. The digestive system starts with mouth and end with…………… a. anus b. rectum c. mouth d. large intestine 12………... break down and crush food in the mouth during chewing. a. teeth b. esophagus c. stomach d. Liver 13. ……………… is a long tube as its length is more than 6 meters. a. small intestine b. large intestine c. stomach d. rectum 14. Our eyes help us see what's around us. What is the organ responsible for perceiving what we see with our eyes? a. The lung b. The esophagus c. The stomach d. The brain 15.Nocturnal animals as fishing cats are better to see in the dark than humans because they have…………………. a.wide eye pupils b.mirror- like membrane c.big eyes d. all the pervious answers. 16.Reading and writing are common types of communication in the………….world. a.humans b.birds c.animals d. plants 17.Which of the following can turn its head in all direction……………… a.owls b.cats c.lizards d.bats 18. Animals that are active at night are called…………….animals. a.diurnal b.nocturnal c.endengered d.extinct 19. Paper and wood are…………….materials. a.transparent b.opaque c.liquids d.gaseous 20………………….produce high pitched sound during winter. a.Hampback whales b.salamanders c.owls d.toads 21. All the following are parts of nervous system except……………. a.heart b.spinal cord c.brain d.nerves 22. Echolocation is used by some animals as………….. a.bat b.dolphin c.jerboa d. (a) and (b) are correct 9 23.All the following are from the function of nervous system except……………. a.processing information b.send messages (signals) c.gathering information d.falling of rains. 24. Which of the following groups reflects light well when it falls on them? a.Mirror – wooden board – metal spoon. b.metal spoon- cardboard – mirror. c.mirror – aluminum foil- metal spoon. d.aluminum foil – bricks – mirror. 25. The feature of light…………….helps to see yourself in the mirror. a.refraction b.reflection c.absorption d.density 26. Peter stopped suddenly on his bike because he heard a car speed by him. Which system received the external signal of hearing that enabled Peter to respond by stopping his bike? a. circulatory system b. excretory system c. muscular system d. nervous system 27-Light …………. a. takes up space b. is made up of matter c. is a form of energy d. has a magnetic force 28.The arrows in each answer choice represent light rays. Which drawing shows how light is reflected by a mirror? a- b- c. d. 29.What type of surface scatters light unevenly? a. shiny b. rough c. smooth d. transparent 30.What happens to light when it hits a rough surface? a. scattering b. reflection c. absorption d. refraction 31. What word is used to describe light as it strikes a smooth, shiny surface and bounces off? a. shadow b. energy c. reflection d.. wavelength 32.The class is playing tug of war during recess. There are 10 students on either side of the rope. What would explain that no one has moved? A. One team has more force than the other. B. One team has half the force of the other. C. The teams have equal and opposite forces. D. The teams have unequal and opposite forces. 33. Ahmed is sliding down the hill on a piece of cardboard. His sister pushes him from behind. What effect does this have on his motion? A. He stops. B. He speeds up. C. He slows down. D. His motion remains the same. 34. Which of the following indicates motion? A. bicycle B. sunlight C. running water D. guitar string 35. Which would die if it could not adapt to environmental change? A. a rock B. a car C. an apple tree D. a glass 10 36. What happens to organisms that cannot adapt to environmental change? A. The population increases. B. The organisms die off. C. The population stays the same. D. The biodiversity of the ecosystem increases. 37.How does the adaptation of traits over time benefit a species? A. It decreases the species survival rate during environmental change. B. It increases the species survival rate during environmental change. C. It changes all of the organism's structures. D. It changes all of the organism's learned behaviors 38.What can be adapted over time and generations to allow species to survive environmental change? A. water B. air C. soil D. traits 39. Antelope that live in wide, open plains must adapt by using A. thick fur which helps to keep them warm in winter. B. long legs which help them run fast. C. bright colors to help them attract a mate. D. their hard outer shell to protect them. 40. Read the following scenario. In which part of the event is your nervous system receiving a message? A. You touch your finger to a cactus thorn. B. You pull your hand away. C. You yell “Ouch!” D. Your finger begins to bleed. 41. What are the two organs that make up the central nervous system? A. the brain's cerebellum and the spine B. the sympathetic and parasympathetic nervous system C. the sensory and motor system D. the spinal cord and the brain 42.. Amanda suddenly woke up and smelled something burning. She crept down the stairs to see what was happening. She found her parents reading and sitting by the fire place, which was burning wood. Why did Amanda wake up? A. The smell of the fire sent a signal through her blood cells to her brain and she woke up. B. The smell of the fire sent a signal through her nerves to her brain and she woke up. C. Amanda's nose was stuffy from a cold, and she could not sleep. D. Amanda was too cold upstairs to sleep. 43.When gasoline is burned, stored chemical energy is released in the form of...and light. A. fumes B. carbon dioxide C. sparks D. heat 44. Eyes squint instinctively to avoid light when bright light falls on them suddenly. Which two systems are involved in this process? A. nervous and muscular B. nervous and respiratory C. circulatory and muscular D. circulatory and respiratory 11 45.When you clap your hands, what happens to the energy of motion in your hands? A. It becomes sound energy and heat energy. B. It becomes potential energy and solar energy. C. Some is lost, and some becomes sound energy. D. Some is lost, and some becomes chemical energy. 46…………….is considered as behavioral adaptation in living organisms. a.long ears b.living burrows c.big eyes d.countershading 47………………….is considered as structural adaptation in living organisms. a.bird migration b.panting c.brown fur d.puffing up body to appear bigger 48.When exposing to danger, the…………..system helps to recognize it and avoid it. a.circulatory b.digestive c.nervous d.respiratory 49.The force that slow slow down or decreases the speed of an object is the……….force a.pushing b.gravity c.friction d.pulling 50.The energy gained by ball when it falls from high place is………….energy. a.potential b.kinetic c.light d.chemical 51.If the angle of inclination of surface increases, so the speed of the rolling body…………… a.decreass b.increases c.isn’t affected d.equals zero. 52. How is speed determined? A. distance traveled per unit of time B. time per unit of distance traveled C. mass per unit of distance traveled D. volume per unit of mass 53.Which formula can be used to determine speed? A. distance/time B.time/distance C.mass/time D.time/mass 48.What is calculated as the distance traveled per unit of time? A. work B. speed C. density D. acceleration Complete the following sentences from the two brackets: 1. Kapok tree use the wind to carry its fluffy yellow seeds across its………….. (rainforest habitat – desert habitat). 2. Umbrella- shaped tree are……………..( water lily tree &pine tree – acacia tree & kapok tree). 3. Cactus plant grows in …………..(desert – wetland). 4.Savannah forest in Southern Africa characterized by …………temperature (hot – mild). 5. …………….. lives in Amazon rainforest of Brazil (Acacia tree - Kapok tree). 6. The fat layer under the animal's skin to warm it is an ……...adaptation )Structural – behavioral( 7. Water and air pollution, …………….. the natural environment(destroying – restoring). 8. Fish breathe………….gas which dissolved in water (Oxygen-carbon dioxide). 9. …………..in gills carry oxygen gas to the body(Blood vessels – Alveoli). 10. The sharpest sense that dolphins have is the sense of………..( hearing – sight). 12 11. Dolphins use a property called …………(echolocation – countershading). 12. Sound produced by dolphins travels in the form of waves called ……….waves. (sound – light). 13. Human can listen to music through ears, this sense called………(hearing – smell). 14. Bats are able to use the property of ………………. by using sound waves for finding their food in the dark (echolocation – countershading). 15. The brain connects to a group of nerves called the spinal cord passes through the ……………..( backbone – ribcage). 16. The parts of nervous system are sensory receptors, nerves, spinal cord and brain that responsible for…………….( sensation – respiration). 17. Owls rotate their heads in …………..(one direction - all directions). 18. The skin is an important organ of the…………system (Respiratory – Nervous). 19. Bat is ………………animals (nocturnal – morning) 20. When you determine a sweet or bitter, you have used ( the nose – tongue) 21. ……..mix and grind food inside the mouth (Teeth only- Teeth and tongue) 22. Mangroves trees grow in………….(Fresh water - salt water) 23. The lungs are one of the important organs in the…….system )Respiratory - Digestive( 24. The cactus plant has spines that protect it from being eaten by desert animals, and this is considered a form of ………..... (behavioral Adaptation - structural Adaptation) 25. A tube with muscles that help push food into the stomach, called……... (Trachea- Esophagus). 26. In order for the human being to remain alive, there is an integration between the senses and the…….…. system to interact with the surrounding environment. (Respiratory – Nervous). Give one example for: 1.Transparent materials…………………………………………………………………….. 2. Opaque materials………………………………………………………………………… 3. Smooth and shiny material………………………………………………………………. 4.Rough material…………………………………………………………………………… 5. Source of light…………………………………………………………………………… Cross the odd word out: 1.The moon - The sun – Fire – The light bulb 2.Wood - glass – human body – metal 3. air – water – rocks – lenses 4. plastic- cloth – mirror – wood 5. Brain- spinal cord- Diaphragm- Nerves. Mention the type of adaptation for the following: 1. Brown or dark bear has dark fur (Structural adaptation) 2. Chameleon has V-shaped feet and a tail like a hand (Structural adaptation) 3. Barbary fig has sharp spines (Structural adaptation) 4. The jerboa has long hind legs(Structural adaptation) 5. The jerboa hops in zigzag paths (Behavioral adaptation) 13 6. Chameleons can move each of their eyes in a different direction (Structural adaptation) 7.The thick white fur of polar bear (Structural adaptation) 8.Puffing the body of panther chameleon with air (Behavioral adaptation) 9.Panting of fennec fox(Behavioral adaptation) Answer the following: 1.Jerboa have long and strong hind legs that help them to jump quickly and escape in dangerous times. Determine the type of adaptation…………………………………………. 2. Leaves of plants that float above the surface of the water are so wide that they can …………………………………………………………………………………………………. 3. How can firefly insects produce light to communicate with each other. ……………………………………………………………………………………………….…… ……………………………………………………………………………………………………. 4.Bats can’t see in the dark, but they can hunt their preys at night(Explain) ……………………………………………………………………………………………………. 5.Mention the importance of air bags and seatbelts …………………………………………………………………………………………………… …………………………………………………………………………………………………… Choose from column (B) what suits it in column (A): (A) (B) 1. Low-pitched sounds a. enable to transfer information 2. Codes b. travel better through warm water 3. High-pitched sounds c. travel better through cold water (A) (B) 1. The spinal cord a. It is similar in its processing of information to a computer 2. using the sense of sight b. When a foreign object is brought into your eye 3. The brain c. When an object falls from your hand 4. The reflex action occurs d. the transmission of commands to the muscle to contract (A) (B) 1. camouflage a. it does not absorb food 2. esophagus b. a type of adaptation that helps an animal to hide 3. sight c. it helps us see 14  (A) (B) 1. carbon dioxide gas a. is common organ in the digestive and respiratory system 2. respiration b. a gas necessary for respiration 3. throat (pharynx) c. a muscle that has an important role in the breathing process 4. diaphragm d. the process of pushing air in and out of the body 5. oxygen e. is a gas produced by respiration (A) (B) 1. nerve a. branches inside the lungs that resemble tree branches 2. bronchioles b. carry messages to the brain via the spinal cord 3. behavioral adaptation c. the kapok tree emits beautiful scents to attract bats Give one example for each the following: 1. A source of light that gives off its own light ………………………………………………………………………………………….. 2. An animal have a spectacular night vision, which enables it to see at night to hunt its prey ………………………………………………………………………………………………… 3. A sense that help fishing cat to see well in the dark ………………………………………………………………………………………………… 4.An animal lives in water and communicate by songs ………………………………………………………………………………………………… Problems: 1. Calculate moving objects that travel a distance of 25 meters through 5 second? …………………………………………………………………………………………………… …………………………………………………………………………………………………… 2. Calculate moving objects that travel a distance of 500 kilometers through 5 hours? …………………………………………………………………………………………………… …………………………………………………………………………………………………… 3. If Adel travels a distance of 50 meters through 10 second calculate the speed? …………………………………………………………………………………………………… …………………………………………………………………………………………………… 15 4.A train travels from Cairo to Tanta in a distance of 300 kilometers in 3 hours. Calculate the distance. ………………………………………………………………………………………………….. ………………………………………………………………………………………………….. 6. Calculate moving objects that travel a distance of 100 kilometers through 1 hour? …………………………………………………………………………………………………… …………………………………………………………………………………………………… 6.If two cars moved at the same time for 20 seconds, car (A) covered distance of 100 meters, While car (B) covered distance of 300 meters. Which of the two cars has the higher speed? …………………………………………………………………………………………………… …………………………………………………………………………………………………… …………………………………………………………………………………………………… In opposite figure: When the compressed spring is released a change in energy occurs from………..energy to ……………energy. Compare between each the following: 1.Inhalated air and exhaled air during breathing process of person. Inhaled air exhaled air 2.Structural adaptation and behavioral adaptation. Structural adaptation behavioral adaptation 3.Communication in humans and communication in animals. Communication in human communication in animals 16 Classify the following object into transparent and opaque objects: (rocks - air – wood – water -metals – glass window – human body – lenses) Transparent objects opaque objects What is the meant by? 1.Motion ……………………………………………………………………………………………….….. 2.Speed: ………..…………………………………………………………………………………………. 17 18