6th Grade Earth Science Review

How does heat flow in the mantle?

• Magma is heated becomes less dense and rises. Then cools and sinks.

• Magma is heated becomes more dense and rises. Then cools and sinks.

• Magma is heated becomes less dense and sinks. Then cools and rises.

• Magma is heated becomes more dense and sinks. Then cools and sinks.

Your hand becoming warmer when holding a hot mug is an example of what type of heat transfer?

• Radiation

• Convection

• Conduction

• Currents

Convection within the atmosphere and the oceans is powered by

• heat from the sun.

• winds.

• gravity

• the tilt of the Earth.

Which of the following is not an evidence for plate tectonics?

• Similar fossils on land masses separated by oceans.

• Land masses that seem to fit together.

• Mountain ranges and deposits on land masses separated by oceans.

• Similar languages and cultures on land masses separated by oceans.

Which of the following contributes to soil formation?

• Rock is broken down by weathering.

• Plants and animals add organic matter to soil.

• Both choices are correct.

• Neither answer is correct.

Winds move from areas of high pressure to areas of low pressure. What causes these differences in air pressure?

• Gravity differences.

• Unequal heating of the atmosphere and surface of the Earth.

• Wind chill.

• The rise and fall of the tides.

Gravity is the attractive force between two objects. It depends in

• the mass of the objects.

• the distance between the objects.

• Both answers are correct.

• Neither answer is correct.

Planets, comets, meteroids and asteroids are held in their orbits by

• the gravitational pull of the moon.

• the gravitational pull of the Sun.

• The gravitational pull of a black hole.

• Convection currents.

What causes the phases of the moon?

• The revolution of the Earth around the sun.

• The rotation of the Earth on its axis.

• The rotation of the moon on its axis.

• The revolution of the moon around the Earth.

In a lunar eclipse the _____ is directly between the sun and the ______.

• Earth, moon

• Moon, Earth