Weathering

Imagine Isla, Ava, and David are on a field trip. They come across a natural chemical or physical process that breaks down rock on Earth's surface. What is this process called?

• weathering

• erosion

• deposition

• jackhammering

This type of weathering occurs when rocks weaken then break down due to chemical changes in the composition of the rock.

• mechanical weathering
• chemical weathering
• erosion weathering
• deposition

Weeds growing into the cracks in a sidewalk and the sidewalk begins to crumble is an example of:

• mechanical weathering
• chemical weathering

Potholes forming in the road after a cold winter is an example of:

• mechanical weathering
• chemical weathering

A metal statue slowly turning green after years of being outside is an example of:

• mechanical weathering
• chemical weathering

Rocks along a riverbed that are smoothed from continuously moving water and sediment rubbing against them is an example of:

• mechanical weathering
• chemical weathering

A piece of sandstone changing color (from brown to rusty red) from exposure to water and air is an example of:

• mechanical weathering
• chemical weathering

The formation of stalactites and stalagmites in a cave as water mixed with carbon dioxide creates carbonic acid, which dissolves away the limestone, is an example of:

• mechanical weathering
• chemical weathering

Exposure to rain and oxygen causes the metal minerals in rocks to rust and fall apart.  This is an example of:

• mechanical weathering
• chemical weathering

Imagine Kai and Avery are on a field trip to a historical graveyard. They notice that the face of a marble gravestone is wearing away due to acid rain. This phenomenon is an example of what?

• mechanical weathering

• chemical weathering