science 9 final review with cel.ly

Science 9 Final Review with Cel.ly

1. The process by which moleclues at the surface of liquid absorb enough energy to change into a gas is called

a) Transpiration.b) Evaporation.c) Condensation.d) Percipation.

2. The two main branches of science are

a) Physics and chemistry.b) Natural and social science.c) Natural and physical science.d) Biological and earth science.

3. Which of the following is NOT a major source of freshwater pollution?

a) Human and animal wastesb) Industrial wastesc) wetlandsd) Agricultural chemicals

4. Pesticides are most likely to be found in runoff from

a) Roads.b) Farm fields.c) Homes.d) Factories.

5. A scientific model is a

a) Representation of a real event or object.b) Small building used to conduct experiments.c) Mathematical statement of a theory.d) New theory that takes the place of an incorrect

one.

6. The main branches of natural science are

a) Physics and chemistry.b) Biology, zoology, and ecology.c) Medicine and agriculture.d) Life, physical, and earth science.

7. The first step in the scientific method is usually

a) Making an observation.b) Forming a hypothesis.c) Collecting data.d) Testing a hypothesis.

8. A series of logical steps that is followed in order to solve a problem is called the

a) Experimental process.b) Scientific theory.c) Scientific method.d) Model method.

9. Technology can best be defined as

a) Science that uses computers.b) New inventions. c) Applied science.d) The use of lenses and microscopes

10. Which question cannot be answered by an experiment?

a) Does penicillin kill Salmonella bacteria?b) Is rabies caused by a virus?c) Did a comet impact kill the dinosaurs?d) Can radiation cause cancer?

11. Approximately what percentage of Earth’s water is fresh water?

a) 97%b) 71%c) 30%d) 3%

12. Groundwater is found

a) In the unsaturated zone.b) In the saturated zone.c) In the impermeable layer.d) Above the water table.

13. Scientists test a hypothesis by

a) Formulating questions.b) Designing models.c) Doing experiments.d) Drawing conclusions.

14. Most of the Earth’s fresh water is found in

a) Huge masses of ice near the North and South Poles.

b) Cracks and spaces in underground soil and rock.c) The oceans.d) Rivers and lakes.

15. New water that enters an aquifer from the surface is called

a) Recharge.b) A spring.c) An artesian well.d) A geyser.

16. The total amount of water on Earth

a) Is increasing.b) Is fairly constant.c) Is decreasing.d) Depends on the weather.

17. Which of the following could cause a river to flood?

a) Colder than normal spring temperaturesb) A period of less rain than usual in an areac) An increased volume of water entering the river

channeld) Natural levees forming alongside the river

18. Which of the following is not a branch of biology?

a) geologyb) ecologyc) zoologyd) medicine

19. Scientific theories can be changed or replaced when

a) New technology is invented.b) New discoveries are made.c) Scientists decide to work on different problems.d) Scientists make models of events or objects.

20. A lake that stores water for human use is called a

a) Reservoir.b) Wetland.c) Watershed.d) Pond.

21. Using water wisely to avoid wasting it is called

a) Desalination.b) Distribution.c) Conservation.d) Irrigation.

22. Fossil fuels come from

a) Living plants and animals.b) Atomic reactions.c) Soil.d) Remains of dead organisms.

23. In order to move from the ocean to the atmosphere, a water molecule must

a) Release energy.b) Absorb energy.c) Condense.d) Transpire.

24. Which of the following are NOT a common source of drinking water?

a) icebergsb) riversc) reservoirsd) aquifers

25. The process by which plants release water into the air is called

a) Precipitation.b) Condensation.c) Evaporation.d) Transpiration.

26. Which of the following is a way to conserve water?

a) Taking longer showersb) Reusing water in a factory to cool hot machineryc) Letting the water run while you brush your teethd) Using open ditches to carry water for irrigation

27. For a scientific theory to be valid, it must allow you to

a) Perform experiments.b) obtain new results each time.c) Find a new, more complex explanation.d) Make predictions

28. Specific sources of pollution that can be identified are called

a) Point sources.b) Nonpoint sources.c) Runoff.d) Sewage.

29. A pollutant often found in road runoff is

a) Sewage.b) Pesticides.c) Oil.d) Industrial chemicals.

30. Household wastewater and the wastes in it are called

a) Sewage.b) Flocs.c) Sludge.d) Gray water.

31. What does it mean to say that “no experiment is a failure”?

a) All experiments are observations of real events.b) All experiments yield desired results.c) All experiments give scientists work to do.d) All experiments involve manipulating variables.

32. Many homes are not connected to public sanitary sewers might dispose of sewage using a(n)

a) Aquifer.b) Septic system.c) Reservoir.d) Well.

33. Which of the following statements about ecosystems is not true?

a) Ecosystems include living and nonliving things.b) Temperature and climate are not part of an

ecosystem.c) An ecosystem can be as small as a rain puddle.d) Sunlight, air, and water can be parts of an

ecosystem.

34. The land area that supplies water to a river system is called a

a) Watershed.b) Tributary.c) Divide.d) Stream.

35. Which of the following animals are adapted to cold, wet places?

a) Polar bears.b) Lions.c) Elephants.d) Mosquitoes.

36. Group of plants and animals that are adapted to similar conditions form a(n)

a) Population.b) Ecosystem.c) Community.d) Organism.

37. In a balanced ecosystem with predators and prey, if the number of prey decreases

a) The number of predators will decrease.b) New predators will move into the area.c) There will be no change in the ecosystem.d) The number of prey will eventually increase.

38. A forest destroyed by a fire will gradually becorme a complex ecosystem with a wide variety of plants and animalsina process called

a) Regeneration.b) Evolution.c) Succession.d) Development.

39. An example of a short-term ecological change is

a) A volcanic eruption.b) A large and devastating forest fire.c) Change in seasons.d) Global temperature change.

40. Nonrenewable resources are

a) Resources that are used faster than they can be replaced.

b) Very expensive resources.c) Energy from the sun.d) Rare earth elements.

41. Which of the following is not a renewable resource?

a) sunlightb) windc) Waterd) Natural gas

42. Solar cells

a) Photograph sunspots.b) Convert sunlight into electricity.c) Convert sunlight and carbon dioxide into sugars.d) Convert electricity into solar energy.

43. Fossil fuels include

a) Coal and oil.b) Wood and charcoal.c) Coal, natural gas, and oil.d) Hydrogen, oxygen, and acetylene.

44. Which of the following is not consider an alternative source of energy?

a) Energy from the sunb) Wind and water energyc) electricityd) Natural gas

45. Which of the following statements about wind energy is not true?

a) Wind energy is a nonrenewable energy resource.

b) Wind energy is used to sail ships.c) Wind energy is not reliable.d) Windmills are currently being used to provide

energy.

46. Which of the following is not a fossil fuel?

a) oilb) natural gasc) coald) hydrogen

The atmosphere is

a) The layer in which weather occurs.

b) The layer of water in the oceans.

c) The layer of gases that surrounds the Earth.

d) The that contains the ozone layer.

47

48Earth’s atmosphere is important to living things because it

a) Contains dust.

b) Provides all the gases needed.

c) Maintains a constant relative humidity.

d) Is very thin compared to the size of the Earth.

49As you rise farther in the atmosphere, air pressure

a) Doesn’t change.

b) Decreases.

c) First increases then decreases.

d) Increases.

50The main layers of the atmosphere are classified according to changes in

a) Altitude

b) Density

c) Temperature

d) pressure

51The layer in our atmosphere in which weather occurs is the a) Troposphere

b) Mesosphere

c) Stratosphere

d) exosphere

52From Earth to space, the main layers in our atmosphere are:

a) Stratosphere, troposphere, mesosphere, thermosphere

b) Thermosphere, troposphere, stratosphere, mesosphere

c) Troposphere, stratosphere, mesosphere, thermosphere

d) Mesosphere, troposphere, stratosphere, thermosphere

53What is the first layer of atmosphere an astronaut passes through during reentry form space?

a) Exosphere

b) Mesosphere

c) Stratosphere

d) ionosphere

54Radio waves are reflected back to Earth in the

a) Thermosphere

b) Ionosphere

c) Exosphere

d) mesosphere

55As depth beneath Earth’s surface increases, temperature and pressure

a) Both decrease

b) Both increase

c) Stay the same

d) Approach zero

56How do geologists observe Earth’s interior?

a) By recording and studying seismic waves

b) By directly looking under the many layers

c) By visiting deep mines

d) Sending robots deep beneath the surface

57Earth’s mantle is

a) A layer of molten metal

b) A layer of rock that forms Earth’s outer skin.

c) A dense ball of solid metal

d) A layer of hot rock

58Earth’s inner core is

a) A layer of hot rock.

b) A dense ball of solid metal.

c) A layer of molten metal.

d) A layer of rock that forms Earth’s outer skin.

59When you touch a hot pot or pan, the heat moves from the pot to your hand. This is called

a) Subduction

b) Magnetic energy

c) Heat transfer

d) Indirect evidence

60The transfer of heat through space is called

a) Radiation.

b) Subduction.

c) Conduction.

d) Convection.

61

Heat is transferred within a fluid by

a) Conduction.

b) Density.

c) Radiation.

d) Convection currents.

62When the heat source is removed from a fluid, convection currents in the fluid will

a) Eventually stop.

b) Change direction.

c) Speed up.

d) Continue at the same rate forever.

63The hydrosphere includes all of the following EXCEPTa) Groundwater

b) All of the options are included

c) Glaciers

d) Oceans

64Heated air moves from baseboard heaters to the rest of a room in a process called

a) Convection.

b) Insulation.

c) Conduction.

d) Radiation.

65A material that does NOT conduct heat well is called a(n)a) Radiator.

b) Insulator.

c) Metal.

d) Conductor.

66Earthquakes occur mostly

a) In the asthenosphere.

b) At plate boundaries.

c) At the edges of the continents.

d) In the middle of continents.

67The breakage of rocks along a fault line releases energy in the form ofa) P waves.

b) Seismic waves.

c) Light.

d) Heat.

68Which of the following is NOT a characteristic of S waves?

a) Travel slower than P waves.

b) Are transverse waves.

c) Travel through solids, liquids and gases.

d) Can be demonstrated by shaking a slinky or rope up and down.

69Waves that cause the most damage during an earthquake are

a) Surface waves.

b) P waves.

c) Ocean waves.

d) S waves.

70A seismograph measures

a) The force of the earthquake.

b) The location of the epicenter.

c) The speed of S waves.

d) How much the surface of Earth moves during an earthquake.

71The minimum number of seismograph stations necessary to determine the location of an earthquake’s epicenter is

a) One.

b) Two.

c) Three.

d) Four.

72Scientists can calculate the distance from the seismograph station to the focus using

a) The difference in arrival times of S and surface waves.

b) The difference in arrival times of P and surface waves.

c) The difference in arrival times of P and S waves.

d) None of the above

73The magma released from volcanoes is

a) Material from the core.

b) Liquid iron and nickel.

c) Molten rocks from the mantle and crust.

d) Radioactive.

74The magma of shield volcanoes is rich ina) Silica

b) Nitrogen and oxygen.

c) Hydrogen.

d) Magnesium and iron.

75A cinder cone volcano is caused by

a) Diverging plates.

b) Gas trapped in the magma.

c) Converging plates.

d) Vents.

76Composite volcanoes are made up of

a) Many layers of metamorphic rock.

b) Many layers of lava rich in magnesium and iron.

c) Many layers of cinders and lava.

d) Many layers of cinders.

77The point beneath Earth’s surface where rock breaks under stress and triggers an earthquake is called the

a) Footwall.

b) Syncline.

c) Epicenter.

d) Focus.

Could add questions from unit 4 test beginning with #18.