Earth and Sky Review

An astronomer is...

• a scientist who designs machines, systems, or structures.

• a scientist who studies stars, planets, and other objects in the universe.

• a scientist who studies the processes and materials of the Earth.

• a scientist who studies and predicts weather.

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What force helps determine which way is up?

• a frictional force

• a gravitational force

• a magnetic force

• an electrical force

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Which demonstration supports Jorge's claim that Earth's gravity pulls objects toward its center?

• Dropping objects from different heights and timing their fall

• Weighing objects at different places on Earth

• Throwing objects at different angles and sketching their fall

• Dropping objects on level ground and hillsides and sketching their fall

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Why does "up" change even if people stay in one spot on Earth?

• because rocks can fall to the ground

• because the ground is still

• because the sky always looks the same

• because Earth spins

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How can students demonstrate gravity?

• Drop a marble and a feather from the same height.

• Roll different balls to see which travels furthest.

• Build paper airplanes to see which flies fastest.

• Make toy cars collide and change direction.

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What happens when people drop rocks?

• The rocks will fall into another country.

• The rocks will hit the next person.

• The rocks will fall to Earth because gravity pulls toward the center of Earth.

• The rocks will fall and bounce back up.

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What is a constellation?

• An arrangement of stars as seen from Earth.

• A huge object that gives off heat and light.

• The time it takes Earth to orbit the sun once.

• The pull between Earth and other objects.

What causes day and night according to the diagram?

• Earth's rotation around the sun.

• Earth's rotation on its axis.

• The moon's rotation around Earth.

• The sun’s rays' strength.

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Why couldn't Xenia see the constellation Orion during a summer camping trip?

• The light from the campfire made it difficult to see Orion.

• Orion can only be seen during the daytime in summer.

• Orion is a winter constellation and can't be seen at night in summer due to Earth's orbit.

• The brightness of the Sun made it difficult to see Orion.

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What causes nighttime where Sebastian lives?

• Earth must revolve around the sun.

• Earth must revolve around the moon.

• Earth must rotate on its axis.

• The moon must revolve around Earth.

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