Igneous and Metamorphic Rocks: Contact Metamorphism

The video explains how cooking eggs is a chemical change, similar to contact metamorphism in rocks. When eggs are cooked, heat causes chemical changes, altering their color and texture. Similarly, contact metamorphism occurs when magma intrudes existing rock, causing it to become superheated and form new rock types.

Why do we cook eggs instead of eating them raw?

• To change their chemical structure

• To reduce their nutritional value

• To make them taste better

• To make them easier to peel

What happens to the part of the egg closest to the heat?

• It becomes transparent

• It turns white

• It remains unchanged

• It becomes softer

What is contact metamorphism?

• A process where rocks are eroded by water

• A process where rocks melt completely

• A process where rocks are formed by sedimentation

• A process where rocks change due to heat from magma

What causes rocks to undergo contact metamorphism?

• Heat from the sun

• Erosion by wind

• Pressure from tectonic plates

• Heat from nearby magma

What is the result of contact metamorphism?

• Formation of new rock types

• Complete melting of rocks

• Rocks becoming more porous

• Rocks turning into sand