Grade 6 Science Revision Sheet PDF 2024-2025

First Term 2024 – 2025 Name: _______________________________ Class: ________________________________ 1| Page Topic 1 Lesson (1) Describing and Classifying Matter A. Choose the correct answers: 1. Menna is chopping and shaping some of large pieces of wo...

First Term 2024 – 2025 Name: _______________________________ Class: ________________________________ 1| Page Topic 1 Lesson (1) Describing and Classifying Matter A. Choose the correct answers: 1. Menna is chopping and shaping some of large pieces of wood into uniform shapes to build her shelter. What kind of change is taking place as the wood is chopped? A. a change in matter B. a change in physical property C. a change in substance D. a change in chemical property 2. Evan and his friends are working on a group project on matter. Michelle says that matter is anything that has mass. Ricky says that matter must have mass and also be touchable. Evan thinks matter must have mass and also be visible. Leon disagrees and says that matter has both mass and takes up space. Who is correct? A. Michelle C. Evan B. Ricky D. Leon 3. Sierra helps her father install an air purifier in her house. What type of separation method does an air purifier use to remove dust and allergens from the air? A. distillation C. evaporation B. filtration D. magnetic attraction 2| Page  4. Min is conducting an experiment where he compares the properties of water and lemonade. The first stage of the experiment is focusing only on the physical properties of the water and lemonade. Which comparison point would Min not use in the first stage? A. color C. flammability B. conductivity D. boiling point 5. Annie learns that the compound sulfuric acid is called the universal chemical. The acid is used in everything from gasoline to paper. Annie uses beads in three different colors to model sulfuric acid. Based on the model, what is the chemical formula of sulfuric acid? A. S2HO4 B. O2H4S C. S4O2H D. H2SO4 B. Circle the correct word(s) to complete the sentence: 1. Ahmed burns some of small twigs and branches to start a fire in order to cook his dinner. Burning wood is an example of a change in (Physical / Chemical) property. 3| Page  2. A group of two or more atoms held together by chemical bonds is a (compound / mixture). C. Answer the following questions: 1. Label his illustrations by placing the words from the word bank in the correct boxes. Each illustration has two different labels. The same label can be used for more than one illustration. Not Ato Element m Molecule Every label will be used: (Element Compound Atom Molecule) 2. What are two ways in which mixtures differ from compounds? ________________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ 4| Page 3. Oliver's science project consists of six sealed and labeled containers. He challenges his classmates to identify pure substances versus mixtures. Use the graphic organizer to identify each substance as a pure substance or mixture. (Air Smog Oxygen Sugar Coffee Chocolate milk) Pure Substances Mixtures ____________________ ___________________________ ____________________ ___________________________ ____________________ ___________________________ ____________________ ___________________________ ____________________ ___________________________ 5| Page  Topic 1 Lesson (2) Measuring Matter A. Choose the correct answer: 1. Apollo 17 astronauts collected the last samples of moon rocks to bring back to Earth in 1972. The astronauts took measurements of the moon rocks using three categories not affected by gravity. This is because the Earth and moon have different forces of gravity. Which measurement did they not use? A. mass C. weight B. density D. volume 2. Maria needs to calculate which object has a mass of 27 grams. If each object has an identical volume of 3 cm³, which object has a mass of 27 grams? A. A C. C B. B D. D 3. Madi places each object in large bowl of water in order to determine if any float. Which of the objects, if any, will float? A. A B. All objects will float C. C D. No objects will float 6| Page 4. Since the moon's gravity is less than Earth's, all objects, including mammals, have different weights on the moon than on Earth. Use the table below to calculate how much a dog weighs on the moon. A. 25 lbs B. 30 lbs C. 40 lbs D. 45 lbs 5. A balloon filled with air does not rise as high as a balloon filled with helium. What does this tell you about the density of Helium? A. Helium is denser than air B. Helium is less dense than air C. The two gases have the same density D. When heated, helium becomes more dense 6. The formula for calculating density is ----------------------- A. Mass × Volume C. Mass ÷ Volume B. Mass × Weight D. Volume ÷ Mass 7| Page B. Write (T) if the statement is true, or (F) if its false: 1. The SI unit of mass is the cubic meter. ( ) 2. An object that floats in water has a density less than 1 g/mL. ( ) 3. The SI unit of volume is the kilogram. ( ) 4. An object’s weight is less on the moon than on Earth. ( ) 5. If you drop a marble into a glass of water, the marble will sink because its weight is greater than that of water. ( ) C. Write a letter on each line to identify the type of measurement: Andrew is creating a matching game as a review for his science unit on measuring matter. Help him match the descriptions with the type of measurement they describe. Write M for mass, and V for volume, and D for density. 1. Amount of space that matter occupies 2. Measured in grams per cubic centimeter (g/cm³) 3. Measure of mass of a material in a given volume 4. Measured in grams (g) 5. Measured in cubic centimeters (cm³) 6. Amount of matter in an object 8| Page D. Study the following table then answer the questions: Lauren makes an art piece using the densities of various liquids to create layers of colors. She first determines the density of each liquid. Then she pours them into a glass container and watches them separate into layers. 1. What information did she need to find the density of each liquid? 2. How did she calculate density? 3. Which liquid sinks to the very bottom, and which floats at the very top? ________________ ____________________________ ___________________________ 9| Page  Topic 2 Lesson (1) States of Matter A. Using the words below complete each of the following: (Solids – Gases – Liquids- honey - vinegar) 1-……………… have no definite shape and no definite volume. 2-…………………. Have no definite shape but definite volume. 3-……………………… have definite shape and definite volume. 4-………………...… is an example of a liquid with high viscosity, while……………..… is an example of a liquid with low viscosity. B. Write true or false: 1. All solids are hard. ( ) 2-Carbon dioxide takes the shape and the volume of the container. ( ) 3- Surface tension is an inward pull among the molecules of a liquid that brings the molecule on the surface closer together, causes the surface to act as if it has a thin skin. ( ) 4- Particles of a solid move around one another, while liquid particles can vibrate in place only. ( ) 5- Volume can be measured in cubic centimeters (cm3) or liters (L) ( ) 6- Liquids with high viscosity can flow easily. ( ) 10 | P a g e C. Choose the correct answer: 1- In the Figure below which particles are closely packed together? a. solid particles b. liquid particles c. gas particles 2- Which of the following is not a crystalline solid? a. Salt b. glass c. sugar 3- A Liquid’s resistance to flow is called: a. melting b. surface tension c. Viscosity d. vibration D. Answer the following questions:. 1. Compare between crystalline and amorphous solids. Crystalline solid: ____________________________________________________________ ____________________________________________________________ Amorphous solids: ____________________________________________________________ ____________________________________________________________ 2. A liquid is also called a fluid. Why? ____________________________________________________________ 11 | P a g e  Topic 2 Lesson (2) Changes of State A. Write the correct scientific term: (Evaporation – Melting – Freezing – Freezing point – Condensation- Melting point – Boiling point) 1. The process in which solids change into liquids. (……………………………) 2. The process in which liquids change into solids. (……………………………) 3. The process in which liquids change into gases. (………………………..…) 4. The process in which a gas changes to a liquid. (……………………………) 5. The temperature at which a liquid changes into solid. (………………….........) 6. The temperature at which a substance changes from a solid to a liquid. (………………………) 7. The temperature at which a liquid boils. (……………………………) B. Write true or false: 1.You can increase the thermal energy of a substance by heating.( ) 2.Melting is a change in state that involves a decrease in thermal energy. ( ) 3.Both sublimation and boiling occur only on the surface of a substance.( ) 4.The reverse of melting is freezing. ( ) 5.Melting point and freezing point can be used to identify substances. ( ) 6. When a gas turns to a liquid, the energy of the particles increases. ( ) 12 | P a g e  7. Vaporization is the reverse of freezing. ( ) 8. Sublimation is the change of state from a solid directly to a gas without passing through the liquid state. ( ) C. Fill in the blanks: 1. When the particles …………….... thermal energy, they move faster and thetemperature will …………………..……… 2. When the particles..................... thermal energy, they move slowerand the temperature will …………….………………. 3. The two main types of vaporization are: ………………………..…… and …………………………………. 4. Pressure = ………………………………….……………… 5. As the liquid is heated, when the pressure inside of a liquid equals the atmospheric pressure the liquid …………………………….. D. Answer the following questions: 1. How is boiling different from evaporation? ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ 13 | P a g e 2. Compare between thermal energy and temperature by writing the definition of each: Thermal Energy Temperature __________________ __________________ __________________ __________________ __________________ __________________ Definition __________________ __________________ __________________ __________________ 14 | P a g e  Topic 3 Lesson (1) Energy, Motion, Force, and Work A. Choose the correct answer: 1- …………………. is the force exerted on an object that causes it to move in the same direction in which the force is exerted. a-Work b-Power c-Kinetic energy. d-Potential energy 2-…………………. is the ability to do work or cause change. a-Work b-Power c-Energy d-Mass 3- Is a push or pull exerted on an object? a-Work b-Force c-Energy d-Mass 4- The amount of work done, or the amount of energy transferred in a unit of time is called a-Power b-Force c-Energy d- Pressure 5- If the work done to move a box a distance 4 meters equals 100 joules. Calculate the force. a-400 N b-25 N c-400 J d- 25 J 15 | P a g e  B. Using the words below complete each of the following: (Joule – Power – Watt – Work – Pascal) 1- Work divided by time equals ………………… 2- The unit of work is ……………………………….….. 3- The unit of power is …………………………..….. 4- Force multiplied by distance equals ………………………………... C. Fill in the blanks: 1. An object is in motion when it's ……………………… change. 2. For a given force, a maximum work is done when both the …………………… and the ……………….…… are in the same direction. D. Answer the following questions: 1. If you exerted a lot of force on a lid to open a jar, but the lid did not move. Did you make work? Why? ……………………………………………………………………………………………………………………………. Calculate the work done when a force of 65 Newton acted on a body to move it a distance of 10 meters. ……………………………………………………………………………………………………………………………. 2.Calculate the power that is used when you use a force 300 N to lift heavy tools for a distance of 5m in 30 sec. ……………………………………………………………………………………………………………………………………………………………..... …………........................................................................................................................................................................................................................................................................... 16 | P a g e  Topic 3 Lesson (2) Kinetic energy and Potential Energy A. Using the words below complete each of the following: (potential energy – Kinetic energy – Elastic potential energy – Gravitational potential energy) 1. Energy that an object has due to its motion. (……………………………….) 2. The energy an object has because of its position. (……………………………….) 3. Potential energy of stretched or compressed objects. (………………………….) 4. Potential energy that depends on the height of an object. (…………………….) B. Choose the correct answer: 1. Which factor(s) affect the kinetic energy? a. mass only b. speed and time c. speed and mass d. speed, mass, and time 2. The gravitational potential energy of an object is equal to its weight multiplied by its a. depth c. volume b. height d. diameter C. Problem Solving: 1. Lance is a 30-kg runner who, on a good day, runs at a speed of 5 m/s. What is his kinetic energy when he runs at this speed? …………………………………………………………………………………………………………………… 2. Calculate the gravitational potential energy of a bird weights 30 N standing on a tree branch of 4 meter hight from the ground. …………………………………………………………………………………………………………..…… Good Luck 17 | P a g e