Why Earthquakes Happen

Question 1

Scientists say an earthquake starts with something deep below the Earth and ends with something we feel on the surface. Which choice correctly matches the cause and its effect?

Accepted Answer

Rocks far underground slip or break suddenly, and the shaking makes the ground above move back and forth.

Answer

A volcano erupts far underground, and the shaking makes the ground above move back and forth.

Answer

Rocks far underground slip or break suddenly, and the ground above cracks open.

Answer

Strong winds blow far underground, and the shaking makes the ground above move back and forth.

Question 2

Lina felt the playground floor tremble while she was drawing. Which sentence correctly explains why the shaking began?

Accepted Answer

Far below the ground, pieces of rock slipped past each other, releasing energy that traveled up and made the surface shake.

Answer

A strong wind blew over the playground, pushing the ground and causing it to shake.

Answer

A big truck drove by the school, and the vibrations from its wheels moved through the pavement.

Answer

Water deep underground turned into steam and exploded, shaking the ground.

Question 3

Maya feels the floor of her classroom shake. Which sentence best explains why the shaking started?

Accepted Answer

Large rocks far below the earth slid and snapped, letting out energy that moves through the ground.

Answer

Strong winds pushed the building from the outside.

Answer

Heavy trucks driving on the road made the floor vibrate.

Answer

Rainwater soaked the soil so much that it caused the ground to sink.

Try three questions

Scientists say an earthquake starts with something deep below the Earth and ends with something we feel on the surface. Which choice correctly matches the cause and its effect?

Lina felt the playground floor tremble while she was drawing. Which sentence correctly explains why the shaking began?

Maya feels the floor of her classroom shake. Which sentence best explains why the shaking started?

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