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Which best explains the movement of tectonic plates?
a) They move several centimeters each year because of convection within Earth
b) They move several miles each year because of convection within Earth
c) They move several feet each year because of convection within Earth
d) They move several kilometers each year because of convection within Earth

Which of the following is true?
a) Sound waves and P-waves are longitudinal waves, while light waves are transverse waves.
b) Light waves and P-waves are transverse waves, while sound waves are longitudinal waves.
c) Sound waves, P-waves, and light waves are all longitudinal waves.
d) Sound waves, P-waves, and light waves are all transverse waves.

Which BEST explains the relationship between parent rock and soil composition?
a) Weathered parent rock is the largest component of soil.
b) Weathered parent rock is the smallest component of soil.
c) Weathered parent rock determines the amount of air found in the soil.
d) Weathered parent rock determines the number of organisms in the soil.

Which is the basic composition of Earth's core?
a) The solid inner core is surrounded by a liquid outer core.
b) The liquid inner core is surrounded by a solid outer core.
c) Both the inner and outer core are solid.
d) Both the inner and outer core are liquid.

Which best summarizes the composition of the Earth's surface?
a) earth's surface contains more water than land
b) Three-fourths of earth's surface is land
c) One-fourth of Earth's surface is water
d) earth's surface contains more land than water

How does gravity support life on earth?
a) By keeping water and gases in the atmosphere close to earth's surface, which contributes to life processes
b) By forcing earth to continuously spin on it's axis, which contributes to day and night
c) by preventing meteors and comets from hitting Earth's surface, which protects living organisms from space fragments
d) by causing changes in the distance between Earth and the sun, which contributes to the seasons

Which is considered a good insulator of heat?
a) plastic, because heat is unable to flow easily through it.
b) Glass because it allows heat to flow easily
c) Aluminum, because it allows heat to flow easily
d) Silver, because heat is unable to flow easily through it.

Why are there high and low tides on Earth?
a) They are due to the gravitational pull between earth and the moon.
b) They are due to changes in the moon's tilt on it's axis
c) They are due to the magnetic force between earth and the moon
d) They are due to changes in the moon's speed every month.

Which contributes to Earth's ability to sustain life?
a) The atmosphere is breathable due to the unique mixture of gases
b) The atmosphere is extremely thin due to the temperature of the sun
c) The atmosphere prevents all space debris from reaching the surface due to the ozone layer
d) the atmosphere allows all of the sun's radiation to enter due to Earth's distance from the sun

How does the density of a 4-g sample of copper compare to that of a 12-g sample of copper
a) It's density is the same density as the 12-g sample.
b) It's density is one-half the density of the 12-g sample
c) It's density is twice the density of the 12-g sample
d) It's density is three times the density of the 12-g sample

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