EGYPTIAN AMERICAN INTERNATIONAL SCHOOL Science Department Semester 1 GRADE 4 Revision 2 A. Choose the correct answer: 1. What is the main source of energy for the food web shown? A. hawk B. rabbit C. plants D. toad 2. In this food web, from where does the frog get energy? A. from the cricket B. from the fish C. from the grass D. from the snail 1 P a g e
3. One day on Earth is 24 hours. Some planets have shorter days. Other planets have longer days. What determines the length of a planet s day? A. tilt B. moons C. rotation D. revolution 4. Seasons are reversed in the Northern and Southern Hemispheres. Why do the Northern and Southern Hemispheres never experience the same season at the same time? A. Seasons are longer in the Northern Hemisphere. B. Seasons are shorter in the Southern Hemisphere. C. because the Northern Hemisphere always tilts toward the sun D. because they tilt toward and away from the sun at different times of year 5. Earth is tilted on its axis. Which of these would not exist if Earth had no tilt? A. gravity B. seasons C. lunar phases D. Earth s rotation 6. Earth revolves around the sun. How long does it take for Earth to complete one revolution? A.one day B.one week C.one month D.one year 7. Which material would be best to wrap around a very hot cup to prevent getting burned? A. foam B. paper C. plastic wrap D. aluminum foil 8. Which material would make the best container to warm food over a campfire? A. aluminum B. plastic C. rubber D. wood 2 P a g e
9. Cala has two metal cups and two foam cups. She places one of each type on a metal plate and one of each type on a foam plate. She then fills each cup with very hot water. Which cup of water will lose heat the fastest? A. foam on foam B. foam on metal C. metal on foam D. metal on metal 10. The pots and pans in Sarah s kitchen are made of steel, copper, and aluminum. What is the best reason Sarah s pots and pans are made of these materials? A. They are easy to shape. B. They have low melting points. C. They are excellent conductors of heat. D. They have the ability to stop the flow of heat. 11. People are part of food chains. What is the role of people in a food chain? A. carnivore B. consumer C. herbivore D. producer 12. Earth is a planet in the solar system. A planet can have one or more moons. What is another word that means the same as moon? A. asteroid B. comet C. satellite D. star 3 P a g e
13. The picture below shows one of the phases of the moon. Which phase does the picture show? A. crescent B. new moon C. first quarter D. third quarter 14. The pictures below show some animals you might find in grassland food chains. Which animal is the carnivore? A. 1 B. 2 C. 3 D. 4 15. Kashvi likes to look out the window at the moon. She observes that it seems to change every week. Which sentence best explains why this happens? A. The moon moves between Earth and the sun. B. The moon rotates only once in about a month. C. The same side of the moon always faces Earth. D. The amount of the lighted part of the moon that faces Earth changes. 4 P a g e
16. The sun is at the center of the solar system. Which category of objects in the solar system does not revolve around the sun? A. moons B. comets C. asteroids D. dwarf planets 17. The picture shows a food chain. Which part of the food chain is missing? A. carnivore B. consumer C. herbivore D. producer 18. Sean looks at his calendar. He sees that tonight s phase of the moon will be a new moon. Which will be the next phase Sean sees after the new moon? A. full moon B. first quarter C. third quarter D. another new moon 19. The sun is at the center of our solar system. What are the largest objects that revolve around the sun? A. moons B. comets C. planets D. asteroids 20. The inner and outer planets can be grouped according to their characteristics. Which of these does not apply to the outer planets? A. densest planets B. very cold temperatures C. gases surrounding a solid core D. largest planets in the solar system 5 P a g e
21. There are eight planets in the solar system. Which is true of all planets? A. They have satellites. B. They rotate on their axes. C. They have a surface made of rock. D. They have nitrogen in their atmospheres. 22. Objects can have potential energy because of their position. Which object has potential energy? A. a parked car idling B. a rocket on its way to space C. a spinning top on the floor D. a mango hanging from a branch 23. Objects may have potential energy or kinetic energy. How do potential energy and kinetic energy compare to each other? A. Both describe objects at rest. B. Both describe objects in motion. C. Both are forms of mechanical energy. D. An increase in one leads to an increase in the other. 24. Objects can have potential energy because of their position. Which object has potential energy? A. book sitting on a table B. hands turning on a clock C. spinning wheels on a bike D. flag flapping in the wind 25. A rolling ball has kinetic energy. What does it mean for an object to have kinetic energy? A. The object is in motion. B. The object has stored energy. C. The object has used all of its energy. D. The object is passing on its energy. 26. Fossil fuels are a major source of energy. Which material is not a fossil fuel? A. coal B. natural gas C. oil D. wood 6 P a g e
27. Matthew and José are on a forest field trip. They observe that the forest floor is covered with dead plants. Matthew says, Those plants don t do anything good for the forest. What could José tell Matthew? A. José could tell Matthew that he is right. B. José could say that dead plants will become more food for the forest. C. José could say that the plants should be recycled so they will not cause pollution. D. José could say that cells in the plants will still use sunlight to produce more food. 28. Which statement is true about a community? A. A community is all the same species living in different ecosystems. B. A community is made up of one kind of population living in one place. C. A community is made up of different populations that depend on one another. D. A community is made up of different populations that do not interact with one another. 29. Which population is found in a rainforest ecosystem? A. antelopes B. monkeys C. sponges D. zebras B. Answer the following: 1. Although there are eight planets in the solar system, they have many differences. How are Jupiter and Earth different? Jupiter Earth Size Large Small Made of gases rocks Moons Many moons 1 moon Rings Has rings No rings Cores Small solid core Large solid core Life No life exists Life exists Year Long year Shorter year 7 P a g e
2. You have three cups of hot water. The first one has a spoon made of wood, the second one has a spoon made of metal and the third one has a spoon made of plastic. Which spoon will be the warmest? Why? The second spoon will be the warmest because the metal spoon is a conductor that allows heat to pass through it easily from the hot water. 3. Are blue jays that live in different parts of the United States members of the same population? Explain. No because they live in different parts of the U.S. A population is the same species of organisms that live in the same area. 4. Identify a heat source in your home. Then give an example of how this heat source transfers heat energy. A stove is a heat source. It transfers heat from the burner to the cooking pots by conduction. It heats the air around it by convection. An electric space heater is a heat source. It heats the air around it by convection. It also radiates heat around by radiation. The sun through the window is a heat source It transfers heat through radiation. 8 P a g e