ANSWER
The previous picture represents mechanical weathering
Rocks break down into smaller and smaller pieces with no change in composition
What kind of weathering is described by these steps? Mechanical or Chemical
Freezing water exerts pressure on the rocks and make them split.
Water collects in collects in the cracks of rocks and rock layers.
Water thaws and the cycle called frost wedging, repeats.
Water expands as it freezes.
What specific kind of mechanical weathering is described by these steps?
Freezing water exerts pressure on the rocks and make them split.
Water collects in collects in the cracks of rocks and rock layers.
Water thaws and the cycle called frost wedging, repeats.
Water expands as it freezes.
What is the first step?
A. Freezing water exerts pressure on the rocks and make them split.
B. Water collects in collects in the cracks of rocks and rock layers.
C. Water thaws and the cycle called frost wedging, repeats.
D. Water expands as it freezes.
What is the second step?
A. Freezing water exerts pressure on the rocks and make them split.
B. Water collects in collects in the cracks of rocks and rock layers.
C. Water thaws and the cycle called frost wedging, repeats.
D. Water expands as it freezes.
What is the 3rd step?
A. Freezing water exerts pressure on the rocks and make them split.
B. Water collects in collects in the cracks of rocks and rock layers.
C. Water thaws and the cycle called frost wedging, repeats.
D. Water expands as it freezes.
What is the 4th step?
A. Freezing water exerts pressure on the rocks and make them split.
B. Water collects in collects in the cracks of rocks and rock layers.
C. Water thaws and the cycle called frost wedging, repeats.
D. Water expands as it freezes.
What specific example of chemical weathering is rust?
ANSWER: oxidationOxidation is the reaction of oxygen with other
substances
Carbon produced by organisms combines with water to form carbonic
acid. What is the name of this process?
ANSWER: carbonation
Carbon produced by organisms combines with water to form carbonic acid. What kind of rock
does this dissolve most effectively?
ANSWER: Limestone
Burning of fossil fuels can produce _______ that will break down rock.
ANSWSER: acid precipitation (or acid rain)
What is the name of the kind of weathering that occurs when tiny tree roots get into the cracks of rocks and break them apart as they grow?
ANSWER: Tree root wedging
Is Tree Root Wedging Mechanical or Chemical Weathering?
ANSWER: MechanicalIt is also an example of organic activity
because it is a living organism that causes this weathering
This type of weathering occurs when layers of rock peel off and leave behind a dome shaped rock.
ANSWER: Exfoliation
What are 2 ways frost wedging and thermal expansion/contraction are different?
ANSWER: frost wedging involves water freezing in the cracks of rock
Thermal Expansion/Contraction involves grains of rock heating (expanding) and cooling (contraction)
How are frost wedging and thermal expansion/contraction the same?
ANSWER: they both involve change in temperature from hot to cold
They both are examples of mechanical weathering
Explain 2 ways that abrasion of rock is likely to occur.
Answer: Rocks colliding in moving waterWind: rock particles scrape other rocksGravity: rocks fall and collide into other rocksGlaciers: as they move rocks in the glacier
scrape against other rocks
When decayed plant or animal material break down rocks, is this mechanical or chemical?
ANSWER: Chemical
Describe the difference between mechanical and chemical weathering.
ANSWER: mechanical is when rocks physically break down into smaller and smaller pieces, there is no chemical change.
Chemical is when rocks are dissolved or changed chemically due to a reaction with other substances
Why is it important to have water in soil?
ANSWER: Nutrients travel up the roots of plants through water.
Why is it important to have air in soil?
ANSWER: the air provides space for water and nutrients to travel through out the soil and to plant roots
Why is it important to have organic matter in soil?
ANSWER: organic matter will provide nutrients to the soil