7 th Grade Science

1. 7th Grade Science CATS Review

2. 0% The circus dog in the picture below is balancing a ball on his nose. The ball has __________ energy right now, but when he drops the ball it will have __________ energy. • potential; kinetic • heat; potential • kinetic; potential • heat; kinetic

3. 0% When a gas changes into a liquid, it is called ____________, and the speed of the molecules is ___________. • condensation; increasing • sublimation; increasing • condensation; decreasing • evaporation; decreasing

4. 0% Animals get energy from the food they eat. The original source of the energy in their food is • the soil. • the Sun. • the water cycle. • fertilizer.

5. 0% Elizabeth collects different types of rocks whenever she goes on vacation. She has rocks that contain shiny crystals, grainy rocks, and rocks that are smooth. These rocks are formed by different processes. Which of the following is NOT a process by which rocks are formed? • compaction of sediments • heat and pressure within Earth • freezing of sediments • cooling of magma at Earth's surface

6. 0% John and his mother have blue eyes. His brother, sister, and father all have brown eyes. John is often told that he "has his mother’s eyes." How can this trait be characterized? • It is an adaptation. • It is environmental. • It is acquired. • It is inherited.

7. 0% As the bell rings, which energy transformation occurs? • Chemical energy is converted into sound energy. • Chemical energy is converted into heat energy. • Mechanical energy is converted into sound energy. • Mechanical energy is converted into heat energy.

8. 0% The destruction of rain forests often occurs through what is called "slash and burn" agriculture. This means that trees are cut down and burned, and the land is then used for growing short-term crops or for raising cattle. Which of the following is a result of 'slash and burn' agriculture that can affect the cycles of oxygen and carbon dioxide in the air? • The amount of oxygen in the air will be increased. • The forest will receive less rain. • The amount of oxygen in the air will be reduced. • The amount of carbon dioxide in the air will be reduced.

9. 0% Which of the following is a compound? • salt water • hydrogen • ozone • table salt

10. 0% Which of the following is a characteristic of elements? • They break down when reacting with acids. • They cannot be divided into smaller substances. • They can be altered with an electric current. • They are always metals.

11. 0% Which is a naturally-occurring pollutant? • junkyards • factory smoke • garbage dump • volcanic ash

12. 0% Some rocks are formed by heat and pressure. What is the heat source for rock formation? • heat from forest fires • heat from the Sun • heat from electrical currents • heat from Earth's interior

13. 0% Tom is going to buy two hamsters. He wants to breed them and sell the baby hamsters to a local pet store. The store owner tells him that his customers prefer dark brown hamsters with white bellies, long fur, black eyes, and long tails. Tom found a female hamster with all of those characteristics. Which male hamster should Tom buy in order to have the BEST chance of breeding baby hamsters with MOST of those characteristics? • X • Y • W • Z

14. 0% The fish, the dog, and the bird are alike in many ways. One way is that they all have • legs. • hair. • lungs. • backbones.

15. 0% In which phase of matter are molecules the most tightly packed? • solid • liquid • water • gas

16. 0% Most of the chemical energy of the gasoline burned in a car is not used to move the car but is changed into • electricity. • magnetism. • sound. • heat.

17. 0% Greg is trying to push a box of books across the floor of his room. The box of books doesn't move because the forces on the box are ____________. When his little brother walks in and starts pushing with him, the box begins to slide across the floor. His brother's pushing, combined with his, makes the forces on the box ______________. • shifting; still • balanced; unbalanced • not acting on the box; moving • unbalanced; balanced

18. 0% Organisms that require two parents reproduce __________, while organisms that require only one parent reproduce __________. • dominantly; recessively • sexually; asexually • recessively; dominantly • asexually; sexually

19. 0% The offspring of a plant that reproduces asexually will • develop fruit even if the parent did not. • fail to grow and develop normally. • be incapable of producing flowers. • share all of the parent's characteristics.

20. 0% Which of these shows the correct relationship between tissues, organs, cells, and organ systems from least complicated to most complicated? • cells tissues organs organ system • cells organs tissues organ system • organs tissues cells organ system • organs organ system tissues cells

21. 0% A water cycle diagram is shown below. • precipitation • evaporation • condensation • run-off What does Arrow 1 represent?

22. 0% Which one of the following statements about eclipses is true? • During a lunar eclipse, the Moon passes between Earth and the Sun. • During a solar eclipse, the Moon passes between Earth and the Sun. • An eclipse will always occur during a meteor shower. • An eclipse may last as long as five days

23. 0% The rate of change of an object's _____________ is called ______________. • distance; acceleration • acceleration; force • velocity; acceleration • acceleration; speed

24. 0% Plants use carbon dioxide for which of the following processes? • waste disposal • circulation • movement • food production

25. 0% Fill in the blanks in the chart below with the correct terms. • Biotic; Community; Population • Organisms; Community; Population • Organisms; Population; Community • Biotic; Population; Community

26. 0% What is the purpose of biological adaptation? • to increase reproductive success of an organism • to increase the speed with which an organism can run • to make it harder for an organism to find food • to increase the height of an organism

27. 0% Mimi is able to see the image from the television reflecting off the surface of a mirror. Why can't she see it reflect off the surface of a sheet of newspaper? • Light waves travel through the sheet of paper but not through the mirror. • The mirror reflects the light and the sheet of paper scatters the light. • The mirror is thicker than the sheet of paper. • The mirror is translucent and the sheet of paper is transparent.

28. 0% Genes are responsible for: • all preferences of an organism. • all traits of an organism. • all inherited traits of an organism. • no traits of an organism.

29. 0% Beth carries the recessive gene for red hair. Her husband Steve does not. Which Punnett Square correctly represents the possibilities that their children will have red hair? • w • x • y • z W. Y. Z. X.

30. 0% __________ and __________ are two opposite processes that shape shoreline features. • Erosion; weathering • Erosion; deposition • Sedimentation; deposition • Weathering; accumulation

31. 0% The function of the immune system is to: • protect the body from foreign substances and disease. • circulate blood throughout the body. • protect the organs of the body. • produce hormones.