Mechanical and Chemical Weathering

What type of weathering is it when acid rain breaks down and changes the rock.

• chemical weathering 
• physical or mechanical weathering
• erosion

Tags

NGSS.MS-ESS2-2

NGSS.MS-PS1-2

What is sediment?

• a chemical reaction
• tiny pieces of weathered rock carried by wind or water
• pollution

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-2

Ice wedging will

• wear down rocks as they bounce together 
• break up rocks when the water in cracks freezes and thaws
• peel away loosend material from the surface of rocks. 

Tags

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

Tags

NGSS.MS-ESS2-2

How does freezing water cause the weathering of rocks?  The freezing water—

• keeps the rocks in place
• makes the rocks last longer
• expands cracks and breaks rocks
• causes rocks to fall in landslides

Tags

NGSS.MS-ESS2-2

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-ESS2-1

NGSS.MS-ESS2-2

During chemical weathering, what can happen to the type of rock that has undergone chemical weathering?

• a new rock is produced that is larger than the original rock
• a new rock is produced that is the same as the original rock
• a new rock is produced that is different from the original rock 
• no new rock is created - it is just smaller in size

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-2

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 is the same as Physical Weathering

• True

• False

Tags

NGSS.MS-ESS2-2

These rocks were broken apart from the continuous freeze/thaw of water in the cracks of the rocks. This is an example of:

• ice wedging
• acid rain
• permeability
• abrasion

Tags

NGSS.MS-ESS2-2