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7th grade exam - all topics

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Questions and Answers

How are metamorphic rocks formed?

By volcanic eruptions

By exposure to air and water

By being buried deep in the Earth at high temperatures and pressures (correct)

By rapid cooling of magma

Minerals have a (very complex) ______ formula

chemical

Sedimentary rocks are formed from weathered ______

sediment

What is the next stage after the Red Giant phase in the life cycle of a star?

White Dwarf Signup and view all the answers

What is the fate of Earth and its neighboring planets when the Sun becomes a Red Giant?

They will be swallowed up Signup and view all the answers

The Red Giant phase occurs when a star runs out of hydrogen.

True Signup and view all the answers

Supernova explosions are the largest and most powerful explosions in the universe.

True Signup and view all the answers

Which of the following can form U-shaped valleys by scraping pieces off surrounding rocks?

Glaciers Signup and view all the answers

The movement of weathered rock particles is called ...........

removal Signup and view all the answers

Explain the concept of tectonic plates and their movement in the Earth's crust.

Tectonic plates are moveable lithospheric plates that sit and move along the molten asthenosphere below. They are responsible for the movement and shifting of the Earth's crust. Signup and view all the answers

Which scale is used to describe the resistance of a mineral to scratching?

Mohs scale of hardness Signup and view all the answers

What happens to rocks if they are buried deep in the Earth at high temperatures and pressures?

They form new minerals and metamorphic rocks Signup and view all the answers