Mechanical Weathering

What is ice mechanical weathering

• roots do the same thing

• animals burrowing

• water in rocks freezes and expands and cracks the rock

• rocks bang into each other (water and gravity)

what is animal mechanical weathering

• water in rocks freezes and expands and cracks the rock

• roots do the same thing

• rocks bang into each other

• animals burrowing

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

The process that breaks down rocks and other materials on Earth's surface is called

• weathering
• erosion
• soil conservation
• decomposition

Tags

NGSS.MS-ESS2-2

How does wind abrasion work?

• Sediment is blown off a surface from wind.
• Wind-blown sediment strikes a surface.
• Wind blows large chunks of rock off a surface.
• Sediment falls off of a surface on its own.

Which of the following is an example of mechanical weathering?

• Acidic groundwater dissolving limestone
• frost wedging
• Paper being burned

A marble statue is left exposed to the weather.  Within a few years, the details on the statue have begun to weather away.  This weathering probably is caused by...

• oxygen in the air
• carbonic acid in rainwater
• lichens
• abrasion

Tags

NGSS.MS-ESS2-2

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

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.

Tags

NGSS.MS-PS1-2

What types of rocks are formed by weathering?

• Metamorphic rocks

• Igneous rocks

• Sedimentary rocks

• Volcanic rocks