Lesson 7, Unit 10

How does physical weathering change rocks? Give some examples of physical weathering.

What is a synonym for contract?

• Shrink

• Expand

• big

• tall

What is ice wedging?

Define physical and chemical weathering

Groups:

(a) Physical

,

(b) Chemical

• Minerals change

• Physical

• Heat

• Chemical

• Minerals stay the same

• Acidic Rain

The process that breaks down rocks and other materials on Earth's surface is called

• Weathering

• Erosion

• Deposition

• Decomposition

Which pair are homophones?

• care, car
• steep, stair

• bar, bear

• pair, pear