the way rocks are broken down into smaller bits and soil is called
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The way rocks are broken down into smaller bits and soil is called. weathering. Name 3 things that cause weathering (wearing away) of the rock of the earth’s crust. Wind Water Plants. How does wind cause weathering?. - PowerPoint PPT PresentationTRANSCRIPT
Social Studies 3GCh 2
The way rocks are broken down into
smaller bits and soil is called
weathering
Social Studies 3GCh 2
Name 3 things that cause weathering (wearing away) of the rock of the earth’s crust.
1)Wind 2)Water3)Plants
Social Studies 3GCh 2
How does wind cause weathering?
Wind picks up sand and blows it against rocks, causing them to wear away.
Social Studies 3GCh 2
How does water cause weathering?
• Water moving over rocks, wears them down or picks them up and bounces them around, causing them to break.
• Water also freezes, expands and cracks the rock into smaller pieces.
Social Studies 3GCh 2
How do plants cause weathering?
When plant roots grow into cracks in rocks, they split the rock.
Social Studies 3GCh 2
Which rock looks weathered the most?
•The smoothest
Social Studies 3GCh 2
The movement of soil or bits of rock by wind and water
is callederosion
Social Studies 3GCh 2
The slow erosion to land is caused by….
1) Wind2) Water3) Glaciers4) Gravity
Social Studies 3GCh 2
How do water, ice, wind and gravity cause
erosion.1) Water washes away soil2) Ice (glaciers) scrape up rocks and
soil as they move downhill3) Wind picks up small particles and
moves them to a new spot4) Gravity causes things to move
downhill
Social Studies 3GCh 2
How is a delta formed?
Water moving downstream wears away rock into sediment, and
deposits it at the end of the river. The sediment piles up into new
land, called a delta.Delta’s are often the shape of a
triangle.
Social Studies 3GCh 2
What are glaciers?Huge sheets of ice that form in places that are frozen all year round.
Continental glaciers are much bigger than valley
glaciers.
Social Studies 3GCh 2
How do glaciers change the land?
• Gravity causes glaciers to move downhill about 1 foot a day, and cut into the land along the way.
• They scrape up rocks and soil, and pile them up into hills.
• They scoop out large holes that sometimes fill with water which become lakes.
• They scoop out deep valleys
Social Studies 3GCh 2
Name the layers of the Earth from inside, out.
1) Inner core2) Outer core3) Mantle4) Crust
Social Studies 3GCh 2
What is creep?Gravity causing the erosion of soil, by moving it slowly downhill.Creep causes roads to crack and fences to become crooked.