Science Grade 4 First Term 2024-2025 Past Paper PDF

## Science ### Grade 4 ### First Term 2024 - 2025 ### Final Revision **Mr. Ahmed Elbasha** * طبقاً لأخر تعديل في المادة للعام الدراسي 2025-2024 ### (1) Write the scientific term: | Number | Question | Answer | |---|---|---| | 1 | The main control center in the human body. | Brain | | 2 | The energ...

## Science ### Grade 4 ### First Term 2024 - 2025 ### Final Revision **Mr. Ahmed Elbasha** * طبقاً لأخر تعديل في المادة للعام الدراسي 2025-2024 ### (1) Write the scientific term: | Number | Question | Answer | |---|---|---| | 1 | The main control center in the human body. | Brain | | 2 | The energy that is stored in food and batteries. | Chemical Energy | | 3 | The time taken by organism's body to respond to different information. | Reaction Time | | 4 | It is the force that is exerted when objects rub against each other | Friction Force | | 5 | It is the visible form of energy. | Light Energy | | 6 | It is a type of force that makes objects move away from you. | Pushing Force | | 7 | It is tree that is found in snow and has a triangle shape. | Pine Tree | | 8 | The force that pulls objects downward. | Gravitational Force | | 9 | A system that controls all blood vessels and nerves are one of its parts. | Nervous System | | 10 | Small sacs surrounded with body function extract oxygen from air | Alveoli | | 11 | A group of ants that is responsible for sending smelly message when there is a shortage of food. | Nurse Ant | | 12 | It delivers messages between the spinal cord and different body organs. | Nerves | | 13 | They include the eyes, nose, ears, tongue and skin, and they receive information from the surroundings and send it to the brain. | Sensory Organs | | 14 | A type of surface that reflects light in different directions when the light falls on it. | Rough Surface | | 15 | A large muscle that contracts during breathing in and relaxes during breathing out. | Diaphram | | 16 | A property that helps animals blend in with their surrounding environment. | Camouflage | | 17 | A system that works inside the human body to keep the human away from danger. | Nervous System | | 18 | The energy that is used to operate television. | Electric Energy | | 19 | A feature in the bull shark, in which the upper surface of its body is darker than its lower surface. | Countershading | | 20 | A type of foxes that has sandy-colored fur to adapt its desert environment. | Fennec Fox | | 21 | Safety equipment used to provide soft cushion, when it is inflated automatically with a gas during collision of cars. | Air Bag | | 22 | A plant lives in saltwater habitat and has long, strong roots to resist the water waves | Mangrove | | 23 | The organ used to differentiate between the taste of different types of food | Tongue | | 24 | The ability to do work or cause a change. | Energy | | 25 | A process through which the body gets oxygen from the air and expels out carbon dioxide. | Respiration | | 26 | The energy of an object due to its motion. | Kinetic Energy | | 27 | The objects which allow light to pass through them. | Transparent | | 28 | A reptile that its body is covered by colored scales and has V-shaped feet. | Panther Chameleon | | 29 | A body that appears lighted in the sky at night, but it is not considered as a source of light. | Moon | | 30 | The organ responsible for processing information transmitted to it, then send messages to the sensory organs. | Brain | | 31 | Ants send a smelly message to alert the ants where to find the food. | Scent | ### ( 2 ) Choose the right answer: 1. All the following are transparent objects, except **c. wood.** 2. The presence of a thick white fur is an adaptation in **a. polar bear.** 3. **a. Light** energy is produced from the radio speaker. 4. The force that tries to stop an object moves on a surface is called **b. friction.** 5. All the following are light sources, except **c. eyes.** 6. When an object is in motion, this means that its **d. position** changes. 7. The energy of an object due to its motion is known as **d. kinetic** energy. 8. Fish use **d. gills** to breathe in water. 9. Animals are active at night are called **c. nocturnal.** 10. **c. Toads** produce high pitched sound during winter. 11. When you move something toward you, this represents **c. pulling force.** 12. **a. gravity force.** covers the body of arctic fox. 13. **a. Speed** is the ability to do work or make a change. 14. The bag is considered as **b. an opaque** surface. 15. Reading and writing are common type of communication between **b. humans.** 16. Which of the following can turn its head in all directions? **b. Owl.** 17. All of the following are forms of codes, except **d. Cow.** 18. Digestion process begins in the **a. stomach.** 19. Bull shark can hunt in **c. fresh and salt water.** 20. All the following organs belong to the respiratory system, except **d. stomach.** 21. **a. Owls** are nocturnal animals with bowl-shaped faces. 22. When a car suddenly stops, the passengers move **d. downward.** 23. When the roller coaster stops, its kinetic energy **c. decreases.** 24. **b. Thick fur** is considered a behavioral adaptation in living organisms. 25. When exposed to danger, the **c. nervous** system helps to recognize it and avoid it. 26. You have the most potential energy at height **a. four meters.** 27. **b. Jerboa** moves in zigzag paths. 28. All of the following are components of digestive system, except **d. liver.** 29. The speed of a car that travels 400 meters in 40 seconds is **c. 10 m/sec.** 30. Dolphins depend on their sharp senses of **c. smell** to get food. 31. The form of energy that can be seen is **b. light** energy. 32. The absorption of nutrients in the digestive system occurs in the **a. small intestine.** 33. The main control center of the human body is **a. brain.** 34. Fast messages send by nervous system which we can't think about is **b. heart.** 35. Gills in fish are considered as **a. structural** adaptation. 36. To communicate through sight sense, we need **d. touching something.** 37. From structural adaptations in water lily plant is that it has **c. tiny leaves.** 38. You see yourself in the mirror due to the property of **c. reflection.** 39. As the inclination angle of the ramp increases, the speed of the moving body **b. increases.** 40. The system responsible for moving your hand away from danger, such as touching a hot cup of tea, is the **c. nervous** system. 41. When you move something toward you, this represents **a. pushing force.** 42. Which of the following sentences describes the friction force? **c. It slows down or stops the moving objects.** 43. The energy that is stored in an object due to its position, is known as **b. potential energy.** 44. The potential energy of an object depends on **c. its mass and its height from the Earth's surface.** 45. **a. Puffing up its body during danger** is considered as a behavioral adaptation in the panther chameleon. 46. If there is nothing to stop the movement of an object, this object will **a. stay in motion.** 47. Camouflage means that the animal **b. is hard to be seen among its surrounding.** 48. Umbrella-shaped trees include **d. barbary fig and water lilies.** 49. The five senses of humans and animals include **b. sight, touch, movement, hearing, and smell.** 50. The mirror-like membrane present at the back of eyes of **b. cats only.** 51. Fennec foxes and arctic foxes live in burrows, this belongs to **c. both structural and behavioral** adaptation. 52. Speed is a measurement of how **c. fast** something is moving . 53. A very big truck needs **c. very big engine** to move. 54. Push or pull actions are considered as types of **a. force.** 55. The nervous system can do all the following functions, except **d. falling of rains.** 56. The speed of an object is measured in **c. kilometers per hour**. 57. **a. Reptiles** are animals that become active at night. 58. The friction force produces **c. thermal** energy. 59. There is a **b. chemical** force between the car's tires and the road that decreases its speed gradually. 60. A ball at the top of the hill stores **a. potential** energy. 61. **c. Trachea** passes the food from pharynx to stomach. 62. Paper and wood are **a. opaque** materials. 63. Penguin's feet have blood vessels that bring **c. warm water** from up to his feet. 64. Fish breathe oxygen dissolved in water by **b. gills.** 65. By increasing the speed of moving object, the kinetic energy will **a. increase.** 66. All of the following are components of nervous system, except **d. brain.** 67. One of the adaptations that helps the animal to protect itself from enemies **a. camouflage.** 68. The speed of a car that travels 300 kilometer in 3 hours is **a. 150** km/hr. 69. Collisions usually produce **b. sound energy.** 70. In the electric lamp, electrical energy is changed into **c. light** energy. 71. The organ responsible for the sight sense is **b. the eye.** 72. When you throw a ball in the air, the gravity will make it move **c. downward.** 73. The organ which stores solid wastes until it is released outside body is **d. anus.** ### (3)Complete the following: 1. Food is digested completely in **the small intestine**. 2. The spinal cord is one of the main parts of **the nervous system**. 3. When you kick a ball upward **gravity** force affects on it. 4. Fennec fox has **a tan-colored fur** that helps him hide in the desert. 5. Firefly beetles use their **glow** to release flashes. 6. If a truck moves in high speed so it has more **energy**. 7. Among animals can live in polar environment **the polar bear** and **the penguins.** 8. The fishing cats hunt at night due to bouncing of **light** and **camouflage** strategy to hunt. 9. Humans, amphibians and reptiles have **to breathe oxygen** gas in air. 10. Engineers use **shock absorbers** to slow down the motion of the Shockwave truck. 11. The speed affects the **kinetic** energy of a moving object. 12. In the electric bell, **electrical** energy changes into **sound** energy. 13. Among safety equipment used during collision of cars are **air bag** and **seat belt** 14. When you push a table on the floor, the **energy** transfers from your body to the table. 15. To increase the **kinetic** energy of any moving object we must increase its speed 16. Fireflies use the sense of **light** to communicate with each other. 17. **Owls** and **bats** are from sharp senses in owls. 18. In electric heater, **electrical** energy changes into **heat** energy. 19. A ball at the top of a hill stores **potential** energy. 20. The force that causes falling objects toward the Earth is **gravity** force 21. When the fuel runs out, the car decreases it's speed due to **friction** force. 22. When the mass of an object increases, so its kinetic energy **increases.** 23. The long ears of the fennec fox are example of **a behavioral** adaptation. 24. Humpback whales communicate with each other with their **sound** senses 25. **Energy** is the ability to do work. ### (4)Put (√) or (X) : 1. Seatbelt is one of safety equipment in cars. **(√)** 2. Exhaled air carries oxygen. **(X)** 3. Gravity pulls objects downward. **(√)** 4. We can determine the sound pitch by smelling sense. **(X)** 5. The moon is a source of light, as it reflects sunlight. **(√)** 6. The stopping object can't move until a force acts on it. **(√)** 7. Whales can communicate with each other by using songs. **(X)** 8. Gravity is the force that pulls objects downward to the Earth. **(√)** 9. Digestion process begins in stomach with the help of saliva. **(X)** 10. Kilogram is the measuring unit of speed. **(X)** 11. Bats use their sense of smell to avoid dangers. **(X)** 12. The brain is responsible for processing information. **(√)** 13. Energy can be changed from one form to another. **(√)** 14. Gravity force is an upward pulling force. **(X)** 15. Speaking, writing are ways to communicate with people. **(√)** 16. Hitting a tennis ball needs a pulling force. **(X)** 17. The bus that covers 60 kilometers in 1 hour has a speed = 60 m/sec. **(X)** 18. In the electric fan, the electrical energy changes into kinetic energy. **(√)** 19. The fennec fox has short ear. **(X)** 20. Potential energy is the energy of moving body. **(X)** 21. Light travels in straight lines. **(√)** 22. We eat food to obtain energy. **(√)** 23. Respiratory system is the system responsible for entering air to the body. **(√)** 24. Speed is the physical quantity measured by kilogram. **(X)** 25. Objects fall down to the Earth due to friction force. **(X)** 26. Wood is a transparent object that allows light to pass through it. **(X)** 27. Some animals can see clearly at night. **(√)** 28. Exhaled air carries carbon dioxide. **(√)** 29. Thick white fur is an adaptation in bears that live in polar regions. **(√)** 30. As the height of an object from the Earth's surface increases, its potential energy decreases. **(X)** 31. The force that attracts objects down to the Earth is called pushing force. **(X)** 32. Unbalanced forces cause a change in the object position. **(√)** 33. We can measure the covered distance in kilometer unit. **(√)** 34. Dolphins have strong sight sense. **(√)** 35. Airbag absorbs the energy of the passengers during collision. **(√)** 36. Cats have excellent night vision, while humans are not. **(√)** 37. The main difference between pulling and pushing forces is the direction of the force. **(√)** 38. Sharp spines are examples of adaptation of some plants to prevent animals from eating them. **(√)** 39. At night, cat's eyes look like small lighted lamps. **(√)** 40. The sandy-colored fur of caracal helps it blend in with snow in polar environment. **(√)** 41. After car collision, the airbags deflate as fast as they inflate. **(√)** 42. Unbalanced forces keep an object in its place without moving. **(X)** 43. The moon is not considered as a light source. **(√)** 44. Being exposed to air rich in dust for a long time harms human respiratory system. **(√)** 45. Some animals prefer hunting during the night than hunting during the day.. **(√)** 46. The object that travels down a ramp is affected by the force of gravity. **(√)** 47. Seatbelt is one of the safety equipment in cars. **(√)** 48. Animals communicate with each other by using different senses. **(√)** 49. The desert lizard blend in with large green trees, to hide from its enemies. **(√)** 50. If two objects cover the same distance in same time, so they have the same speed. **(√)** 51. The gravity force causes decreasing the object speed. **(X)** 52. Digestion process starts in the mouth. **(√)** 53. Fishing cat cannot see in the dark. **(√)** 54. Plants have structural adaptation only. **(X)** 55. Transparent objects include mirrors and lenses. **(√)** 56. By increasing the speed of a moving car, the distance that it moves will increase. **(√)** 57. The chemical energy is the stored energy in the battery. **(√)** 58. Potential energy is the energy of moving body. **(X)** 59. Digestion process begins in stomach with the help of saliva. **(X)** 60. Wood is from transparent materials. **(X)** 61. Animals that are active during the daytime are called nocturnal animals. **(X)** 62. The stopped object can't move until a force acts on it. **(√)** 63. Human has excellent night vision that is better than fishing cat. **(X)** 64. Parachutes are used to slow down the speed of Shockwave truek quickly. **(√)** 65. The echoes help dolphins determine the location of preys. **(√)** 66. Friction is a force that opposes motion. **(√)** 67. A normal truck can move faster than a jet airplane. **(X)** 68. Thick white fur is a structural adaptation in fennec foxes. **(√)** 69. Bats use sound waves in communication. **(√)** 70. Nocturnal animals have bigger eyes than humans. **(√)** 71. Energy doesn't transfer from an object to another. **(X)** 72. Bats use their sense of smell to avoid dangers. **(X)** 73. The chemical energy in the battery can be converted into electrical energy. **(√)** 74. Stomach is an important organ in the digestive system. **(√)** ### (5) Complete the following sentences using the words below 1. **Energy** is the ability to do work and it can change from one form to another is called 2. **Brain** is an organ in the nervous system. 3. **Acacia tree** has taproot to search for water. 4. By increasing the speed of an object, its kinetic energy **increases**. 5. **Humpback whale** sings under water for communication. 1. There are two forces that effect on a moving object which are **pushing** and **pulling** forces 2. The eye sends messages to the **brain** through the nerves. 3. As the motion of an object increases, its **kinetic** energy increases. 4. Owl's head turns in **all directions** to find the food. 1. **Wood** is an opaque object. 2. Fish have **gill** to breathe. 3. Friction force between the car tires and the road **decreases** its speed. 4. **Mangrove** tree has long and strong roots to resist water waves. 1. Light travels in **straight** lines. 2. The **nose** is the organ that sends information through nerves to the brain when you smell perfume. 3. **Humpback whale** sings under water for communication. 4. Fish use **gills** to breathe in water. 1. The organ that is responsible for sight is **eye**. 2. If the speed of object decreases, this means that its kinetic energy **decreases**. 3. There are two forces that affect on a moving object which are **pushing** and **pulling** forces 4. The form of energy that can be seen is **light**. 1. **Car seatbelt** is a safety equipment that is used to prevent car passengers from moving forward when the car stops suddenly. 2. **Glass** is considered an example for transparent materials. 3. **Brain** is an organ in the nervous system. 4. In electric bell, electrical energy changes into **sound** energy. 1. Echolocation is used by some animals as **unbalanced** 2. Any object moves from its place when the forces acting on it are **unbalanced** 3. **Eye** is the organ that we can use to receive light. 4. Digestion of food starts in the **mouth.** 5. Fish breathe **oxygen** gas which dissolved in water. ### (6) Give reason: 1. Bats can't see at night, but they can hunt their preys because they depend on echolocation to find prays at night 2. To prevent animals from eating its leaves, they have sharp spines around the leaves of acacia tree. 3. Opaque objects form shadows because the opaque body doesn't allow light to pass through. 4. The inhaled air is different from exhaled air because the inhaled air is rich in oxygen gas, while the exhaled air is rich in carbon dioxide gas. 5. Arctic fox has a thick fur coat to keep its body warm in extreme cold climate. 6. Seatbelts in cars are very important because it keeps the driver from moving forward when the car stops suddenly. 7. Some animals have the ability to make camouflage adaptation to allow wind to move more gently through the leaves without cutting them. 8. Kapok tree has hand-shapedleaves to hide among the colorful rocks in the desert. 9. Wood is considered as an opaque material because it doesn't allow light to pass through 10. Some desert lizards have colorful scales to hide among the colorful rocks in the desert. 11. Fennec fox has a tan-colored coat to hide in a sandy, rocky environment and to protect it from the hot Sun. 12. Water lilies have wide floating leaves to absorb a large amount of sunlight. 13. Barbary fig has sharp spines to prevent animals from eating its fruits and leaves. 14. Dolphins can hear all kinds of sound because they have sharp senses of hearing, so they can hear all kinds of sound. 15. The brain has an important function in the nervous system because it is the main control center of the body. 16. Candle is considered as a source of light because it gives off its own light. 17. You can see an object placed behind a glass cup because the glass cup is a transparent material which allows light to pass through. 18. A mirror can reflect light better than a painted surface because the mirror is more smooth than the painted surface. 19. The fishing cat's eyes seem to glow in the dark because it has a mirror-like membrane. ### (7) What happens to ... ? 1. It produces a chemical reaction inside its body to light up and attract a mate: A firefly wants to attract a mate to reproduce. 2. The soldier ants send smelly messages to alert the other ants: There is a danger near to an ants colony. 3. The nurse ants send smelly messages to scout ants to alert them to find the food: The amount of food in the ants colony decreases. 4. It puffs up its body with air, opens its mouth wide and changes the color of its scales: If panther chameleon is exposed to danger 5. Animals can eat these leaves easily: If the acacia leaves are not guarded by sharp spines. 6. The size of chest increases, the air rich in oxygen gas enters the lungs: If the diaphragm moves downward during inhalation 7. The size of chest decreases, the air rich in carbon dioxide gas comes out of the lungs: If the diaphragm moves upward during exhalation. 8. Humans cannot get clean water to drink and fish cannot get clean water to breathe: If water pollution increases (for humans and fish). 9. They cannot hunt at night: If bats lose the ability to hear by using echolocation property. 10. The shadow of the wood sheet is formed on the wall, because light rays cannot pass through it: You place a wood sheet between a light source and a wall. 11. It doesn't have excellent night vision so cannot hunt at night: The mirror-like membrane in the fishing cat's eyes is not present. 12. Light passes through the glass window: Light falls on a transparent body such as a glass window 13. Light rays are reflected in different directions: Light falls on a rough surface 14. The Shockwave truck starts to stop gradually: The Shockwave driver opens the parachutes 15. Its speed decreases gradually until it stops: A car runs out of fuel on a flat road ### (8) Match: 1. a, b, c, d 2. a, b, c, d 3. a, b, c, d 4. a, b, c, d ### (9) Problems: 1. Find the speed of a runner, if you know that he covers 300 meters in 30 seconds: Speed=distance/time=300/30=10 m/s 2. Which of the following materials is a transparent material and which one is an opaque material? Air: Transparent Rocks: Opaque Wood: Opaque Water: Transparent Metal: Opaque 3. A truck travels a distance of 160 kilometers in 2 hours. Find its speed: Speed=distance/time=160/2=80 km/h 4. Find the speed of a car that moves a distance of 240 Kilometers in 3 hours: Speed=distance/time=240/3=80 km/h 5. A deer runs a distance of 200 meters in 5 seconds. Calculate its speed: Speed=distance/time=200/5=40 m/s 6. If the two cars move in the same time for 10 seconds, car (A) covers a distance 300 meter and car (B) covers a distance 100 m Which car is the faster? Speed (A)=distance/time=300/10=30 m/s Speed (B)=distance/time=100/10=10 m/s So, car (A) is faster. 7. Fig.(A) because reflected light ray are in one direction. 8. 1. Tracea 2. Stomach 3. Bull shark 4. stomach 5. Lungs 6. Anus. 9. 1. Tires 2. Sound 3. Kinetic energy 4. Increase 5. Water 6. Different 7. Brain 8. Unbalanced 9. Sun 10. Digestive 11. Structural