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Contemporary's GED Science
Robert Mitchell

Earth Science

Chapter Review Quiz


Choose the best answer to each question. You may refer to pages 339–368 in Contemporary’s GED Science if you need additional help. When you have finished the quiz, click on Submit Answers to receive feedback and results. You may also choose to e-mail your results to your instructor.


How do scientists believe that Earth most likely formed?
Need a Hint?
A)from a star that cooled
B)from the collapse of a solar nebula
C)from the collision of two other planets
D)from a piece of the Sun that broke away
E)from an exploding star

What was the source of the water that formed the oceans on Earth?
Need a Hint?
A)river water
B)underground bodies of water
C)the Sun
E)water vapor from volcanic eruptions and ice from comets

Which phrase best describes the visible surface of Earth?
Need a Hint?
A)50 percent water and 50 percent land
B)about 70 percent water and 30 percent land
C)about 70 percent land and 30 percent water
D)about 90 percent land and 10 percent water
E)about 90 percent water and 10 percent land

Which of the following statements best describes a geochemical cycle?
Need a Hint?
A)A geochemical cycle is the movement of elements from one chemical storehouse to another.
B)A geochemical cycle is the periodic occurrence of an ice age.
C)A geochemical cycle is the slow change in adaptation that organisms show over time.
D)A geochemical cycle refers to the seasonal changes of weather.
E)A geochemical cycle refers to the solar heating of Earth.

Which of the following is the best definition of plate tectonics?
Need a Hint?
A)Earth's core is hot, molten rock and is the source of heat that leads to volcanic eruptions.
B)The land below Earth's oceans is flat and does not have underwater mountains and valleys similar to mountains found on the continents.
C)Earth's surface (crust) is made up of several large sections of land (plates) that slowly move around on the mantle, changing the position of continents as they move.
D)Earth's continents will someday be grouped together as a single, large landmass.
E)Earth is about 4.6 billion years old.

What role does ozone play in making life possible on Earth?
Need a Hint?
A)Ozone is an atmospheric gas that humans and other organisms breathe, thus making life possible on Earth.
B)Ozone forms a blanket of atmospheric gas that surrounds Earth and helps keep Earth warm, preventing the occurrence of ice ages.
C)Ozone is a protective layer of atmospheric gas that protects Earth from the impact of large asteroids.
D)Ozone is an atmospheric gas that absorbs much of the dangerous, high-energy ultraviolet sunlight that otherwise would reach Earth's surface.
E)Ozone gas is the gas used by plants during the process of photosynthesis, making the production of food possible.

What feature of Earth is responsible for the four seasons (summer, fall, winter, and spring)?
Need a Hint?
A)the tilt in Earth's rotation axis
B)the fact that Earth's surface is mainly water
C)the distance of Earth from the Sun
D)the movement of the Moon around Earth
E)the fact that summer months are generally much warmer than winter months

What does a weather reporter mean by the statement, "The humidity level is 50 percent."
Need a Hint?
A)The air temperature is halfway between freezing and boiling.
B)There is a 50 percent chance of rain today.
C)Air pressure (barometric pressure) is rising.
D)The air currently contains 50 percent of the water vapor that it can hold.
E)There is an equal amount of blue sky and cloud cover.

How is weathering different from erosion?
Need a Hint?
A)Weathering occurs only during winter months; erosion occurs only during summer months.
B)Weathering is the movement of rock fragments; erosion is the breaking down of rocks into smaller pieces.
C)Weathering is the breaking down of rock into smaller pieces; erosion is the movement of rock fragments.
D)Weathering is a breaking down of rock, while erosion is a combining of smaller rocks to make larger rocks.
E)Erosion occurs before weathering.

What information can scientists gain from the study of fossils?
Need a Hint?
A)Fossils give clues about what causes seasons on Earth.
B)Fossils give clues about how Earth formed.
C)Fossils give clues about the exact age of Earth.
D)Fossils help scientists predict weather on a day-to-day basis.
E)Fossils give clues about extinct forms of life and about the aging process of Earth itself.