CHEMICAL VS PHYSICAL WEATHERING

The process of breaking up rocks on Earth's surface is called...

• sediment

• erosion

• weathering

• deposition

Tags

NGSS.MS-ESS2-2

These rocks were made smooth by wind blowing smaller rock particles across their surface.  This is an example of:

• ice wedging
• chemical weathering
• acid rain
• abrasion

This type of weathering occurs when rock is physically broken down into smaller pieces of rock.

• mechanical weathering
• chemical weathering
• erosion weathering
• deposition

How might a weathered mountain appear different than an unweathered mountain?

• Weathered mountain would be taller.
• Weathered mountain would be rounder and less jagged.
• Weathered mountain would be more jagged and less rounded.
• Weathered mountain would have no trees.

Tags

NGSS.MS-ESS2-2

What can you infer about ice?

• It usually causes chemical weathering.

• It expands as it freezes.

• It barely causes weathering at all.

• It does not exert pressure on rocks.

Tags

NGSS.MS-ESS2-2

How is mechanical weathering different from chemical weathering?

• Chemical weathering happens over a much shorter time frame than mechanical weathering.

• Chemical weathering occurs in the tropics; mechanical weathering occurs in temperate climates.

• Chemical weathering occurs in mountains; mechanical weathering occurs on flat surfaces.

• Chemical weathering changes the chemical composition of materials; mechanical weathering does not.

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-ESS2-2

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

Grinding away of rock by rock particles carried by wind, water, ice and gravity is

• abrasion

• gravity

• carbon dioxide

• thermal expansion (temperature)

Tags

NGSS.MS-ESS2-2