Rocks: Readworks Questions

Which of the following is an example of a metamorphic rock?

• Sandstone
• Basalt
• Granite
• Obsidian

How are metamorphic rocks formed?

• By being exposed to heat and heavy pressure
• By cooling and solidifying magma
• By undergoing metamorphosis
• By compacting and cementing sediments

What happens to lava when it cools?

• It undergoes metamorphosis
• It becomes magma
• It hardens into rock
• It erodes and breaks apart

What happens to magma when it cools?

• It erodes and breaks apart
• It becomes lava
• It hardens into rock
• It undergoes metamorphosis

What are sediments?

• Mineral grains that are large enough to see with the naked eye
• Dissolved minerals that fill the spaces between sediments
• Hot, melted rock deep within a volcano
• Tiny bits of rock and sand combined with fragments of once-living things

What happens to sediments as they dry?

• They turn into solids
• They erode and break apart
• They cool and solidify into rock
• They become compacted and cemented together

What happens to sediments over long periods of time?

• They cool and solidify into rock
• They become compacted and cemented together
• They undergo metamorphosis
• They erode and break apart

What happens to igneous rocks that cool slowly?

• They have large mineral grains
• They erode and break apart
• They undergo metamorphosis
• They have small mineral grains

Which of the following is an example of an igneous rock?

• Diorite
• Mudstone
• Sandstone
• Limestone

What happens to magma when it solidifies below Earth's surface?

• It erodes and breaks apart
• It undergoes metamorphosis
• It becomes lava
• It hardens into rock