6th Grade NCFE Review

This chart gives the physical properties of copper. How does the density of a 4-g sample of copper compare to that of a 12-g sample

of copper?

• Its density is one-half the density of the 12-g sample.

• Its density is the same density as the 12-g sample.

• Its density is twice the density of the 12-g sample.

• Its density is three times the density of the 12-g sample.

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Which is considered a good insulator of heat?

• aluminum, because it allows heat to flow easily

• glass, because it allows heat to flow easily

• plastic, because heat is unable to flow easily through it

• silver, because heat is unable to flow easily through it

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Why are there high and low tides on Earth?

• They are due to changes in the moon’s tilt on its axis.

• They are due to the gravitational pull between Earth and the moon.

• They are due to the magnetic force between Earth and the moon.

• They are due to changes in the moon’s speed every month.

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Which contributes to Earth’s ability to sustain life?

• The atmosphere allows all of the sun’s radiation to enter due to Earth’s distance from the sun.

• The atmosphere prevents all space debris from reaching the surface due to the ozone layer.

• The atmosphere is extremely thin due to the temperatures of the sun.

• The atmosphere is breathable due to the unique mixture of gases.

How does gravity support life on Earth?

• by forcing Earth to continuously spin on its axis, which contributes to day and night

• by causing changes in the distance between Earth and the sun, which contributes to the seasons

• by keeping water and gases in the atmosphere close to Earth’s surface, which contributes to life processes

• by preventing meteors and comets from hitting Earth’s surface, which protects living organisms from space fragments

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The diagram below shows the composition of the surface of Earth.

Which best summarizes the composition of the surface of Earth?

• Three-fourths of Earth’s surface is land.

• One-fourth of Earth’s surface is water.

• Earth’s surface contains more land than water.

• Earth’s surface contains more water than land.

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Which is the basic composition of Earth’s core?

• The solid inner core is surrounded by a liquid outer core.

• The liquid inner core is surrounded by a solid outer core.

• Both the inner core and the outer core are solid.

• Both the inner core and the outer core are liquid.

Which best explains the movement of tectonic plates?

• They move several miles each year because of convection within Earth.

• They move several centimeters each year because of convection within Earth.

• They move several feet each year because of convection within Earth.

• They move several kilometers each year because of convection within Earth.

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This chart compares three different types of waves.

How do the wave characteristics compare for these waves?

• Sound waves and P-waves are longitudinal waves, while light waves are transverse waves.

• Light waves and P-waves are transverse waves, while sound waves are longitudinal waves.

• Sound waves, P-waves, and light waves are all longitudinal waves.

• Light waves, P-waves, and sound waves are all transverse waves.

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Which best explains the relationship between parent rock and soil composition?

• Weathered parent rock determines the number of organisms found in the soil.

• Weathered parent rock determines the amount of air found in the soil.

• Weathered parent rock is the largest component of soil.

• Weathered parent rock is the smallest component of soil.