A. Choose the correct answer:

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1 EGYPTIAN AMERICAN INTERNATIONAL SCHOOL Science Department Term 3 GRADE 3 Revision A. Choose the correct answer: 1. Soojin visited a pond near her house and drew the sketch below.it includes ducks, two kinds of fish,and two kinds of plants. How many different populations can be seen in this habitat? a) One b) Two c) Three d) Five 2. Krystina draws a sketch of a desert in her notebook.she includes lizards,cacti.spiders,owls,rocks and soil.which would make the best title for Krystina s sketch? a) A desert community b) A desert ecosystem c) A desert population d) A desert habitat 3. A scientist studies a group of zebras that all live together in the same area. She records information about when they migrate. Which part of an ecosystem is the scientist studying? a) Community b) Population c) Habitat d) Environment 1 P a g e

2 4. What makes up an ecosystem? a) all the animals living in a rain forest b) the space where a plant or animal lives c) all of one kind of animal or plant in the same area d) living and nonliving things that interact in the same space 5. What is the term for everything that surrounds a living thing? a) community b) environment c) habitat d) population 6. Which word describes all the deer living in the same area? a) community b) ecosystem c) habitat d) population 7. Most of Earth is made up of which type of ecosystem? a) desert b) freshwater c) grassland d) saltwater 8. Animals live in a certain habitat depending on their traits and how they live. Look at the picture. In which habitat do you think this animal lives? a) A desert b) A grassland c) A rainforest d) A river 2 P a g e

3 9. Look at the picture of the pond ecosystem. What are some populations in this ecosystem? a) fish, ducks, water b) grass, fish, ducks c) rocks, ducks, fish d) water, rocks, grass 10. Which ecosystem gets a lot of rain and is very warm and humid? a) desert b) grassland c) saltwater d) tropical rainforest 11. Look at these eggs. What has happened? a) A mixture was formed. b) A solution was formed. c) There was a chemical change. d) There was a physical change. 3 P a g e

4 12. Look at these pictures. Which substance was most likely in the model of the volcano before vinegar was added? a) baking soda b) flour c) milk d) water 13. Which of these is a physical change? a) A rock is broken down into smaller pieces. b) A metal bicycle rusts. c) A piece of wood catches fire and burns. d) A piece of fruit turns brown and mushy. 14. Declan mixed lemon juice, water and sugar in a large jug. He stirred until the sugar was dissolved. What type of mixture did Declan make? a) Solution b) Property c) Separation d) Condensation 4 P a g e

5 15. Origami is the art of paper folding. Swans, flowers, and many other shapes can be made out of colored paper. What type of change takes place in origami? a) Chemical change b) Color change c) Physical change d) Solution change 16. When wood burns, smoke, ash and charcoal are formed. This is an example of a) Physical change b) Chemical change c) Solution d) Mixture 17. If you stir sugar into hot tea, the sugar will completely mix in the water, forming a a) Solution b) Property c) Separation d) Dissolve 18. The three states of matter are solid, liquid, and gas. How is a solid different from a liquid? a) A solid has a definite shape. A liquid takes the shape of its container. b) A solid takes the shape of its container. A liquid has a definite shape. c) A solid has a definite volume. A liquid does not have a definite volume. d) A solid does not have a definite volume. A liquid has a definite volume. 5 P a g e

6 19. The three states of matter are solid, liquid, and gas. How is a solid different from a gas? a) A solid spread out to fill its container. A gas has a definite shape. b) A solid takes the shape of its container. A gas spreads out to fill its container. c) A solid has a definite volume. A gas does not have a definite volume. d) A solid does not have a definite volume. A gas has a definite volume. 20. This thermometer shows the temperature outside. Read the thermometer. What will happen to an ice cube if you put it outside? a) It will not change. b) It will change to a gas. c) It will change to a solid. d) It will change to a liquid. 6 P a g e

7 21. Water changes state during evaporation and condensation. How is evaporation different from condensation? a) During evaporation, water changes from a liquid to a gas. During condensation, water changes from a gas to a liquid. b) During evaporation, water changes from a gas to a liquid. During condensation, water changes from a liquid to a gas. c) During evaporation, water changes from a liquid to a solid. During condensation, water changes from a solid to a liquid. d) During evaporation, water changes from a solid to a liquid. During condensation, water changes from a liquid to a solid. 22. Yesterday, John s pond was frozen. Today, the temperature outside is 10 C. Can John ice skate on the pond? a) Yes, the pond is solid ice. b) No, the pond is starting to melt. c) No, the pond is starting to condense. d) Yes, the pond is made of water vapor. This table shows a weather report for a town. Precipitation snow Temperature? 23. What can you infer about the air temperature? a) It is about 0 C. b) It is about 25 C. c) It is about 50 C. d) It is about 100 C. 7 P a g e

8 24. Which is true about mixtures? a) All mixtures are solutions. b) Making a mixture forms new matter. c) Mixtures can be separated. d) Mixtures contain only solids. 25. Rusting is an example of a a) mixture. b) solution. c) chemical change. d) physical change. 26. What stays the same in a physical change? a) the color of matter b) the kind of matter c) the shape of matter d) the size of matter 27. What is the correct term for when all the substances in a mixture are evenly mixed? a) dissolve b) solution c) physical change d) chemical change 28. You observe with your senses of sight, sound, taste, touch and smell. Which sense should you not use to observe when you do an experiment? a) sight b) smell c) sound d) taste 8 P a g e

9 B. Match using letters: 1. All the living and non-living things in a place and their interactions. A. Environment 2. Everything that surrounds a living thing. B. Population 3. The place where an organism lives and can find everything it needs to survive. 4. All the organisms of the same kind that live together in an ecosystem 5. All the populations of organisms that live and interact in an area. C. Ecosystem D. Community E. Habitat 1. A matter that takes up a definite amount of space and has a definite shape 2. A matter that takes up a definite amount of space and takes the shape of the container 3. A matter that does not take a definite amount of space and doesn t have a definite shape 4. A process by which liquid water that turns to a gas 5. A process by which gas can change back to a liquid. A. Gas B. Solid C. Evaporation D. Liquid E. Condensation 9 P a g e

10 1. Physical change ( ) A. Is two or more substances that are combined without changing any of them. 2. Dissolve ( ) B. Is a type of mixture in which all the substances are evenly mixed. 3. Chemical change ( ) C. Is to completely mix one substance in another. 4. Mixture ( ) D. It s a change in which the kind of matter stays the same. 5. Solution ( ) E. In this kind of change new kinds of matter are formed. C.Answer the following questions: 1. Tasha sets up an experiment as shown below. What piece of safety equipment does she need before performing the experiment? Explain. 10 P a g e

11 2. Rita observes what happens when she mixes baking soda and water. She then observes what happens when she mixes baking soda and vinegar. What do you think she will observe? What did she learn? 3. Look at this picture. This candle shows two types of change in matter. Explain. 4. Gloria believes the milk in her refrigerator has gone through a chemical change. How can she use her senses to confirm her hypothesis(guess)? 11 P a g e