Solids – Clip

An avalanche is a rapid flow of solid snow and ice, composed of thick, heavy layers. They occur when surface snow layers cannot be supported by those below, causing them to break off and slide downhill, destroying everything in their path.

What is an avalanche primarily composed of?

• Water and mud

• Solid snow and ice

• Loose snow particles

• Sand and gravel

How are avalanches different from loose snow slides?

• They are made of water

• They are slower

• They consist of thick, heavy layers

• They occur only in summer

What happens when the surface snow layers are not supported?

• They form icebergs

• They evaporate

• They break off and slide downhill

• They melt away

What is the primary cause of an avalanche?

• Heavy rainfall

• Unsupported surface snow layers

• Earthquakes

• High temperatures

What is the result of an avalanche's movement?

• It creates new snow layers

• It destroys everything in its path

• It forms a new mountain

• It stops at the top of the hill