Rocks: Changed Rocks

The video discusses metamorphic rocks, which are formed from other rocks due to heat and pressure. It explains how limestone transforms into marble and describes the immense pressure deep inside the Earth. The classification of metamorphic rocks is based on grain arrangement, with examples like slate and quartzite. The video highlights the variety and characteristics of these rocks.

What is the primary process that transforms limestone into marble?

• Heat and pressure

• Sedimentation

• Erosion

• Weathering

Which analogy is used to help understand the pressure inside the Earth?

• Stacking books on a table

• Stacking plates in a cupboard

• Stacking rocks in a garden

• Stacking books on your hand

How are metamorphic rocks classified?

• By their size

• By their grain arrangement

• By their age

• By their color

What characteristic allows slate to split into flat pieces?

• Parallel grain layers

• Random grain arrangement

• Smooth surface

• High mineral content

Which metamorphic rock has grains arranged randomly?

• Slate

• Limestone

• Quartzite

• Marble