Weathering and Erosion

The agents of which type of weathering include water, oxygen, carbon dioxide, living organisms, and acid rain?

• mechanical weathering

• erosion

• chemical weathering

• soil

Which form of mechanical weathering involves water freezing and thawing in cracks in the rock that eventually break apart the rock?

• abrasion

• release of pressure

• freezing and thawing

• burrowing

What are the two factors that affect the rate at which weathering occurs?

• climate and mass of rock

• climate and size of rock

• type of rock and size of rock

• type of rock and climate

The diagrams  shows a natural process that weathers rock.
 Which statement best explains why this process results in weathering?

• frozen water acts as a solute

• water expands when it freezes

• the mass of water increases when it freezes

• frozen water dissolves most types of rock

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-4

What is mechanical weathering?

• Process through which rocks are physically broken into smaller pieces.

• Rocks are broken down through chemical changes.

• Rocks are worn away from acid in plant roots.

• Rocks broken down by machinery.

Tags

NGSS.MS-ESS2-2

Mechanical weathering increases the rate of chemical weathering. As rock breaks into smaller pieces, the surface area of the pieces increases Figure below. With more surfaces exposed, there are more surfaces on which chemical weathering can occur.
After hit with acid rain, tiny cracks form. Does this make it more likely or less likely to break apart?

• More Likely

• Less Likely

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-2

How do plants weather rocks?

• during photosynthesis

• when roots grow into cracks of rocks and expand the rock

• when the plant moves water from the roots to the leaves

This rock may chemically weather easily because is has many spaces or holes in it that allow water to seep through it, meaning it is:

• permeable

• abrasive

• erosion

• unchangable

Tags

NGSS.MS-PS1-2

What is weathering?

• The process by which
  water, ice, wind or gravity
  moves fragments of rock
  and soil.

• The process by which
  water, ice, wind or gravity
  deposit rock sediments
  and soil in a new place.

• The breaking down of
  Earth’s crust into smaller
  and smaller pieces.

Tags

NGSS.MS-ESS2-2

What is erosion?

• The process by which
  water, ice, wind or gravity
  moves fragments of rock
  and soil.

• The process by which
  water, ice, wind or gravity
  deposit rock sediments
  and soil in a new place.

• The breaking down of
  Earth’s crust into smaller
  and smaller pieces.

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-4