Science 9 Final Review with Cel.ly

1. Science 9 Final Review with Cel.ly

2. 1. The process by which moleclues at the surface of liquid absorb enough energy to change into a gas is called • Transpiration. • Evaporation. • Condensation. • Percipation.

3. 2. The two main branches of science are • Physics and chemistry. • Natural and social science. • Natural and physical science. • Biological and earth science.

4. 3. Which of the following is NOT a major source of freshwater pollution? • Human and animal wastes • Industrial wastes • wetlands • Agricultural chemicals

5. 4. Pesticides are most likely to be found in runoff from • Roads. • Farm fields. • Homes. • Factories.

6. 5. A scientific model is a • Representation of a real event or object. • Small building used to conduct experiments. • Mathematical statement of a theory. • New theory that takes the place of an incorrect one.

7. 6. The main branches of natural science are • Physics and chemistry. • Biology, zoology, and ecology. • Medicine and agriculture. • Life, physical, and earth science.

8. 7. The first step in the scientific method is usually • Making an observation. • Forming a hypothesis. • Collecting data. • Testing a hypothesis.

9. 8. A series of logical steps that is followed in order to solve a problem is called the • Experimental process. • Scientific theory. • Scientific method. • Model method.

10. 9. Technology can best be defined as • Science that uses computers. • New inventions. • Applied science. • The use of lenses and microscopes

11. 10. Which question cannot be answered by an experiment? • Does penicillin kill Salmonella bacteria? • Is rabies caused by a virus? • Did a comet impact kill the dinosaurs? • Can radiation cause cancer?

12. 11. Approximately what percentage of Earth’s water is fresh water? • 97% • 71% • 30% • 3%

13. 12. Groundwater is found • In the unsaturated zone. • In the saturated zone. • In the impermeable layer. • Above the water table.

14. 13. Scientists test a hypothesis by • Formulating questions. • Designing models. • Doing experiments. • Drawing conclusions.

15. 14. Most of the Earth’s fresh water is found in • Huge masses of ice near the North and South Poles. • Cracks and spaces in underground soil and rock. • The oceans. • Rivers and lakes.

16. 15. New water that enters an aquifer from the surface is called • Recharge. • A spring. • An artesian well. • A geyser.

17. 16. The total amount of water on Earth • Is increasing. • Is fairly constant. • Is decreasing. • Depends on the weather.

18. 17. Which of the following could cause a river to flood? • Colder than normal spring temperatures • A period of less rain than usual in an area • An increased volume of water entering the river channel • Natural levees forming alongside the river

19. 18. Which of the following is not a branch of biology? • geology • ecology • zoology • medicine

20. 19. Scientific theories can be changed or replaced when • New technology is invented. • New discoveries are made. • Scientists decide to work on different problems. • Scientists make models of events or objects.

21. 20. A lake that stores water for human use is called a • Reservoir. • Wetland. • Watershed. • Pond.

22. 21. Using water wisely to avoid wasting it is called • Desalination. • Distribution. • Conservation. • Irrigation.

23. 22. Fossil fuels come from • Living plants and animals. • Atomic reactions. • Soil. • Remains of dead organisms.

24. 23. In order to move from the ocean to the atmosphere, a water molecule must • Release energy. • Absorb energy. • Condense. • Transpire.

25. 24. Which of the following are NOT a common source of drinking water? • icebergs • rivers • reservoirs • aquifers

26. 25. The process by which plants release water into the air is called • Precipitation. • Condensation. • Evaporation. • Transpiration.

27. 26. Which of the following is a way to conserve water? • Taking longer showers • Reusing water in a factory to cool hot machinery • Letting the water run while you brush your teeth • Using open ditches to carry water for irrigation

28. 27. For a scientific theory to be valid, it must allow you to • Perform experiments. • obtain new results each time. • Find a new, more complex explanation. • Make predictions

29. 28. Specific sources of pollution that can be identified are called • Point sources. • Nonpoint sources. • Runoff. • Sewage.

30. 29. A pollutant often found in road runoff is • Sewage. • Pesticides. • Oil. • Industrial chemicals.

31. 30. Household wastewater and the wastes in it are called • Sewage. • Flocs. • Sludge. • Gray water.

32. 31. What does it mean to say that “no experiment is a failure”? • All experiments are observations of real events. • All experiments yield desired results. • All experiments give scientists work to do. • All experiments involve manipulating variables.

33. 32. Many homes are not connected to public sanitary sewers might dispose of sewage using a(n) • Aquifer. • Septic system. • Reservoir. • Well.

34. 33. Which of the following statements about ecosystems is not true? • Ecosystems include living and nonliving things. • Temperature and climate are not part of an ecosystem. • An ecosystem can be as small as a rain puddle. • Sunlight, air, and water can be parts of an ecosystem.

35. 34. The land area that supplies water to a river system is called a • Watershed. • Tributary. • Divide. • Stream.

36. 35. Which of the following animals are adapted to cold, wet places? • Polar bears. • Lions. • Elephants. • Mosquitoes.

37. 36. Group of plants and animals that are adapted to similar conditions form a(n) • Population. • Ecosystem. • Community. • Organism.

38. 37. In a balanced ecosystem with predators and prey, if the number of prey decreases • The number of predators will decrease. • New predators will move into the area. • There will be no change in the ecosystem. • The number of prey will eventually increase.

39. 38. A forest destroyed by a fire will gradually become a complex ecosystem with a wide variety of plants and animals in a process called • Regeneration. • Evolution. • Succession. • Development.

40. 39. An example of a short-term ecological change is • A volcanic eruption. • A large and devastating forest fire. • Change in seasons. • Global temperature change.

41. 40. Nonrenewable resources are • Resources that are used faster than they can be replaced. • Very expensive resources. • Energy from the sun. • Rare earth elements.

42. 41. Which of the following is not a renewable resource? • sunlight • wind • Water • Natural gas

43. 42. Solar cells • Photograph sunspots. • Convert sunlight into electricity. • Convert sunlight and carbon dioxide into sugars. • Convert electricity into solar energy.

44. 43. Fossil fuels include • Coal and oil. • Wood and charcoal. • Coal, natural gas, and oil. • Hydrogen, oxygen, and acetylene.

45. 44. Which of the following is not considered an alternative source of energy? • Energy from the sun • Wind and water energy • electricity • Natural gas

46. 45. Which of the following statements about wind energy is not true? • Wind energy is a nonrenewable energy resource. • Wind energy is used to sail ships. • Wind energy is not reliable. • Windmills are currently being used to provide energy.

47. 46. Which of the following is not a fossil fuel? • oil • natural gas • coal • hydrogen

48. The layer in which weather occurs. The layer of water in the oceans. The layer of gases that surrounds the Earth. The that contains the ozone layer. 47 The atmosphere is

49. Earth’s atmosphere is important to living things because it Contains dust. Provides all the gases needed. Maintains a constant relative humidity. Is very thin compared to the size of the Earth. 48

50. As you rise farther in the atmosphere, air pressure Doesn’t change. Decreases. First increases then decreases. Increases. 49