Weathering

What often happens to rocks that undergo chemical weathering?

• They form crystals.  

• They produce acids.

• They become stronger.

• They crumble more easily.

Tags

NGSS.MS-PS1-2

Which are the main causes of crack growth in rocks over time?

• plant roots and ice wedging

• ice wedging and wind abrasion

• animal burrowing and plant roots

• animal burrowing and wind abrasion

Tags

NGSS.MS-ESS2-2

Leaves release acids into the soil as they decay. How could the decaying leaves affect the rocks in the soil underneath them?

• They could increase the amount of physical weathering.

• They could decrease the amount of physical weathering.

• They could increase the amount of chemical weathering.

• They could decrease the amount of chemical weathering.

Tags

NGSS.MS-LS2-3

NGSS.MS-PS1-2

Zora puts the two pebbles shown in a rock tumbler. The tumbler spins so the rocks bump against each other. When she takes the pebbles out, she discovers that pebble 1 had more abrasion than pebble2.

What can she conclude about the pebbles?

• Pebble 2 is softer than pebble 1.    

• Pebble 2 is harder than pebble 1.

• Pebble 2 is less reactive than pebble 1.

• Pebble 2 is more reactive than pebble 1.

Tags

NGSS.MS-PS1-2

Changing temperatures cause the rock to ________ or__________.

• Break / Contract

• Grow / Shrink

• Expand / Contract

• Expand / Shatter

______________ is the breaking down of rock material by physical and chemical processes. 

• Weathering

• Erosion

• Deposition

• Sedimentary Exchange

Tags

NGSS.MS-ESS2-4

______________ weathering is the process of rock breaking down into smaller and smaller pieces.

• Chemical 

• Physical

• Complete

• Shared

What happens to a rock when it is weathered?

• It is broken into smaller pieces.

• It is moved by wind, air, or water.

• It is built up as material is deposited.

• It is changed into another type of rock.

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-2

______________ occurs when water seeps into the cracks of rocks and expands when it freezes.

• Icing

• Wedging

• Expansion

• Ice Wedging

Tags

NGSS.MS-ESS2-2

_____________ weathering is the breaking down of rocks by chemical reactions.

• Chemical

• Physical

• Deposition

• Erosion

Tags

NGSS.MS-PS1-2