9TH GRADE SCIENCE

1
9TH GRADE SCIENCE
Final Review Game
2
B

• When you put oil and water into the same
  container, the oil floats on the water because
  the oil
• a. is more dense.
• b. is less dense.

3
B

• Always wearing protective glasses, tying back
  long hair, and being careful of loose clothes
  while conducting an experiment are examples of
• a. laws.
• b. safety rules.

4
A

• When finding the correct answer to a question or
  problem, scientists may use
• a. the steps of the scientific method.
• b. the steps to the Lincoln Memorial.

5
A

• Stopwatches, rulers, and computers are all ____
  that are used to collect data during an
  experiment.
• a. tools
• b. observations

6
A

• 1. A hypothesis is often developed out of
• a. observations.
• b. laws.
• c. experiments.
• d. Both (a) and (b)

7
B

• As you explore ____, you learn about the
  relationship between matter and energy.
• a. all branches of science
• b. physical science
• c. Earth science

8
A

• Which of these is NOT matter?
• a. sunshine
• b. a cloud
• c. you

9
D

• Your weight could be expressed in which of the
  following units?
• a. pounds
• b. kilograms
• c. Newtons
• d. Both (a) and (b)

10
A

• Which of the following statements about density
  is TRUE?
• a. Density depends on mass and volume.
• b. Density is weight per unit volume.

11
B

• Which of the following best describes weight?
• a. the same as mass
• b. dependent on where the object is in relation
  to Earth.

12
B

• Although the Statue of Liberty is made of copper
  (originally an orange-brown color), it is green
  because the copper has interacted with substances
  in the air to form new substances with different
  properties.
• This is an example of a
• a. physical change.
• b. chemical change.

13
A

• Considering that gold is one of the densest
  substances on Earth, which would you rather carry
  around school in your backpack all day, a
  kilogram of gold or a kilogram of feathers?
• a. gold, because it would take up less space in
  your backpack
• b. gold, because your backpack would feel lighter

14
A

• The SI unit for expressing the amount of matter
  in an object is the
• a. kilogram (kg).
• b. newton (N).

15
B

• When you add bleach to the water while you are
  washing your clothes, you are encouraging
• a. conductivity.
• b. a chemical change.

16
A

• An old car's bumper that was coated with chromium
  does not rust because chromium is
• a. not reactive with oxygen.
• b. ductile.

17
B

• How would you measure the volume of a screw?
• a. by placing it on a spring scale
• b. by placing it in a graduated cylinder of water
  and seeing how much liquid it displaces

18
A

• A book has a length of 25 cm, a width of 20 cm,
  and a height of 5 cm.
• What is its volume?
• a. 2,500 cm3
• b. 50 cm3

19
B

• Which of the following best describes the
  particles of a liquid?
• a. The particles are far apart and moving fast.
• b. The particles are close together but moving
  past each other.

20
B

• Boiling points and freezing points are examples
  of
• a. chemical properties.
• b. physical properties.

21
B

• Which of the following describes what happens as
  the temperature of a gas in a balloon increases?
• a. The speed of the particles decreases.
• b. The volume of the gas increases and the speed
  of the particles increases.

22
A

• Dew collects on a spider web in the early
  morning. This is an example of
• a. condensation.
• b. evaporation.

23
D

• The atoms and molecules in matter
• a. are attracted to one another.
• b. move faster at higher temperatures.
• c. are constantly moving.
• d. all of the above

24
A

• Which of the following contains plasma?
• a. a fire
• b. steam

25
B

• Which of the following occurs when a liquid
  becomes a gas?
• a. The particles give off energy.
• b. The particles break away from one another.

26
B

• The four most familiar states of matter are
• a. melting, freezing, vaporization, and
  condensation.
• b. solid, liquid, gas, and plasma.

27
B

• Which of the following is the LEAST viscous?
• a. honey
• b. water

28
A

• Which of the following is a chemical property?
• a. flammability
• b. density

29
B

• Nonmetals are
• a. good conductors of thermal energy.
• b. unmalleable.

30
B

• Which of the following is an element?
• a. sodium chloride
• b. sodium

31
A

• Silicon, boron, and antimony are
• a. metalloids.
• b. colloids.

32
B

• A feather and a rock dropped at the same time
  from the same height would land at the same time
  when dropped
• a. by an astronaut on the space shuttle.
• b. by an astronaut on the moon.

33
B

• A 5 kg object has less inertia than a ____
  object. (1 kg 1,000 g)
• a. 4 kg
• b. 6,000 g

34
A

• Materials that can flow to fit their containers
  include
• a. both gases and liquids.
• b. gases.

35
A

• Of the following, where would atmospheric
  pressure be greatest?
• a. at sea level
• b. on a mountaintop

36
A

• Most substances
• a. are more dense than air.
• b. have the same density as air.

37
D

• The atmosphere stretches approximately ____ above
  us.
• a.10 km
• b.50 km
• c.15 km
• d.150 km

38
B

• A bicycle tire remains inflated because air
  particles
• a. form a crystal matrix inside the tire.
• b. are constantly moving and pushing against the
  inside of the tire.

39
A

• A bicycle tire feels harder as you pump more air
  into it because as you pump more air into the
  tire,
• a. more air particles push against the walls of
  the tire, increasing the tire pressure.
• b. fewer air particles push against the walls of
  the tire, increasing the tire pressure.

40
B

• Fluid pressure is always directed
• a. up.
• b. in all directions.

41
A

• You heat an empty aluminum soda can for several
  minutes with a high-wattage hair dryer, causing
  the heated, "energized" particles of air inside
  the can to escape through the opening. Quickly,
  you seal the can's opening with strong tape. As
  the can cools, atmospheric pressure will
• a. crush the can.
• b. do nothing to the can.

42
B

• Steel is almost eight times more dense than
  water. A steel ship can float in water instead of
  sink because of its
• a. mass.
• b. shape.

43
B

• Where would you notice the most pressure?
• a.10 m above the surface of the Earth
• b.100 m below the surface of water

44
A

• You do not notice atmospheric pressure on your
  body because
• a. the fluids inside your body also exert
  pressure.
• b. of gravity.

45
B

• Which of the following is NOT a renewable
  resource?
• a. wind energy
• b. nuclear energy

46
D

• Which of the following is a conversion from
  chemical energy to thermal energy?
• a. Food is digested and used to regulate body
  temperature.
• b. Charcoal is burned in a barbecue pit.
• c. Coal is burned to boil water.
• d. All of the above

47
B

• In every energy conversion, some energy is always
  converted into
• a. kinetic energy.
• b. thermal energy.

48
B

• An object that has kinetic energy must be
• a. heavy
• b. in motion.

49
A

• Which of the following is NOT a fossil fuel?
• a. firewood
• b. gasoline

50
B

• Which of the following is NOT an energy resource?
• a. plant matter
• b. an electric generator

51
A

• Suppose you have just lifted a 50 N bowling ball
  2 m above the floor. Which of the following is
  true?
• a. You performed work equal to 100 J to lift the
  ball.
• b. The balls gravitational potential energy is
  equal to 50 J.

52
B

• The kinetic energy of an object can be found if
  the objects ____ are known.
• a. weight and height
• b. speed and mass

53
B

• When one object does work on another, energy is
• a. destroyed.
• b. transferred.

54
B

• What is the kinetic energy of a car with a mass
  of 4000 kg traveling at 20 m/s?
• a.80,000 J
• b.800,000 J

55
A

• Which of the following vehicles has the MOST
  kinetic energy?
• a. large truck traveling 30 m/s
• b. large truck traveling 25 m/s

56
A

• Because work and energy are so closely related,
  they are both expressed in
• a. Joules.
• b. kilocalories.

57
B

• ____ is stored in a stretched rubber band.
• a. Kinetic energy
• b. Potential energy

58
A

• Before a music box will play music, you must do
  work on the spring inside by winding it up. This
  work is stored as ____, giving the music box the
  ability to play music.
• a. potential energy
• b. kinetic energy

59
B

• What is the gravitational potential energy of a
  540 N diver standing on a platform 3 m high?
• a.180 J
• b.1620 J

60
B

• At what point does a roller coaster have the
  greatest kinetic energy?
• a. the top of the biggest hill
• b. the bottom of the biggest hill

61
B

• The chemical energy of the food we eat is a
  result of a conversion of
• a. thermal energy to light energy.
• b. light energy to chemical energy.

62
A

• Our most important nonrenewable resource is/are
• a. fossil fuels.
• b. wind energy.

63
B

• If fossil fuels are nonrenewable, why do we use
  them for energy?
• a. They do not produce pollution.
• b. They provide a large amount of thermal energy
  per unit of mass.

64
A

• A single uranium fuel pellet contains the energy
  equivalent of about one
• a. metric ton of coal.
• b. day's worth of solar energy.

65
A

• Coal was formed from the remains of ____ that
  were in swamps millions of years ago.
• a. plants
• b. animals

66
B

• Most coal used in the United States today is
  burned by
• a. trains for power.
• b. power plants to run electric generators.

67
B

• Which nonrenewable resource is used the most to
  heat businesses and homes?
• a. oil
• b. natural gas

68
B

• Which fossil fuel creates the most fuel
  emissions?
• a. oil
• b. coal

69
B

• The United States' primary source of electrical
  energy is generated by
• a. the wind.
• b. burning fossil fuels.

70
B

• An electric generator
• a. creates energy.
• b. converts energy of one type into another.

71
A

• Without the ____ from the sun, life on Earth
  would not be possible.
• a. nuclear energy
• b. sound energy

72
B

• When you turn on a light bulb, you convert
• a. potential energy into electrical energy and
  light energy.
• b. electrical energy into light energy and
  thermal energy.

73
B

• Which of the following converts sound energy to
  electrical energy?
• a. geyser
• b. microphone

74
B

• More efficient light bulbs produce more
• a. thermal energy.
• b. light energy.

75
B

• Which statement about protons is true?
• a. Protons circle the nucleus of an atom.
• b. Protons are part of the nucleus of an atom.

76
A

• What did Democritus, Dalton, Thomson, Rutherford,
  and Bohr all have in common?
• a. They each contributed to the development of
  the atomic theory.
• b. They each identified new elements.

77
B

• Which of the following has the LEAST mass?
• a. proton
• b. electron

78
B

• Atoms are composed of
• a. atomic mass units.
• b. electrons, protons, and neutrons.

79
B

• The atomic number of an atom is the total number
  of ____ in the nucleus.
• a. protons and electrons
• b. protons

80
A

• Which of the following is a true statement about
  elements?
• a. Each element has a unique atomic number.
• b. All elements are found in their uncombined
  form in nature.

81
A

• Which of the following is NOT found on the
  periodic table?
• a. the density of each element
• b. the atomic mass of each element

82
A

• Most metals
• a. are made of atoms with few electrons in their
  outer energy level.
• b. are made of atoms with many electrons in their
  outer energy level.

83
A

• Mendeleev arranged the elements
• a. in order of increasing atomic mass.
• b. in order of increasing atomic number.

84
D

• When an element seemed to be missing from his
  periodic table, Mendeleev
• a. predicted that the element would be
  discovered.
• b. predicted the properties of the missing
  element.
• c. left a gap in his table for the missing
  element.
• d. All of the above

85
A

• You can see your reflection in a mirror because
  metals tend to be
• a. shiny.
• b. conductive.

86
B

• Air is mainly composed of elements that are
• a. metals.
• b. nonmetals.

87
B

• Unlike most transition metals, mercury
• a. is gold-colored.
• b. is in the liquid state at room temperature.