BIOLOGY MIDDLE SCHOOL

Temperature can weather rocks because _____.most rocks do not absorb heat evenly
water contracts when it freezes
heat can cause minerals to oxidize
rocks usually melt in the hot sun

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When wet rocks dry out, they can crack and break. This process, called slaking, is an example of what?
chemical weathering
physical weathering
water erosion
wind erosion

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In which of the following locations would chemical weathering happen most quickly?
Amazon rainforest
Sahara desert
North Pole
Great Plains
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Which of the following is an example of chemical weathering?
A river carrying dirt into a lake.
Wind carrying sand from a beach.
Chemicals in water dissolving minerals in rock.
Friction between two rock surfaces grinding away minerals.

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Choose all the answers that apply.

Erosion:
can damage aquatic ecosystems
removes fertile topsoil
can decrease revenue from agriculture
is caused mainly by wind and water
is the breakdown of rock and other material

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Choose all the answers that apply.

Erosion can be reduced by:
contour plowing
putting up fences
planting trees
removing topsoil

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Which of the following statements is true?
Since the Dust Bowl, erosion has not been a problem in the United States.
The most fertile part of soil is found a few feet below the surface.
Runoff happens when the ground cannot absorb anymore water.
Oxidation happens when carbonic acid gains electrons from oxygen.

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PLEASE HELP 911

Answers

Answer 1
Answer:

Answer:

given below

Explanation:

1) correct answer is option c)

when the temperature changes it leads to oxidize the mineral which leads to create crack.

2) correct answer is option b)

physical weathering is the process of to crack and break in wet rock.

3) correct answer is option a)

In amazon rainforest the chances of chemical weathering is very high.

4) correct answer is option d)

erosion is the process in which the rock and mineral  break down into smaller pieces.

5) correct answer is option c)

planting tree can reduce erosion as tree binds the top layer of soil.

6) true answer is option c)

runoff occurs when no water is absorbed by the soil.
Answer 2
Answer: rocks can oxidize in heat and the minerals can cause the rock to crack and break off .

slaking is physical weathering because the rock is still the same, but its wet.

chemical weathering would happen the most quickly in the amazon rainforest.

chemicals in water dissolving minerals in rock is chemical weathering.

erosion removes fertile topsoil, is caused mainly by wind and water, and can decrease revenue from agriculture.

erosion can be reduced by planting trees and contour plowing.

runoff happens when the ground cannot absorb anymore water is a true statement.
 

 

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Which statement describes a disadvantage of nonrenewable resource?


HURRY

Answers

Answer:

it is difficult to change the habit of using the resource

Explanation:

Gasoline for example is a convenient energy source and because it is convenient and relatively cheap it is hard to stop using it.

Answer:

d

Explanation:

It is difficult to change the habit of using the resource.

What causes temperatures in the summer to be higher than temperatures in the winter?

Answers

Due to the earth's tilt, It will be hotter in some areas that are facing to the sun but in some areas it will be colder beacuse the earth is not facing to the sun.
During this time the sun is closer to the earth in its yearly revolution around the sun. In winter another place on earch is hotter because it is closer than we are. 

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Answers

Natural Selection and Evolution Not all members of a species are the same. Every species exhibits this is due to variation and not all individuals in a population will survive to reproduce due to different traits.

What are the  two evidences that supports the fact that species change due to certain genetic variations?

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Answer: VARIATION & TRAITS;GENES

Explanation:

I JUST DID IT;)

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Answers

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Answer:

Do you need answer for all of them?

Explanation:

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Answers

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Answers

It turns the acid lake into ph7 neutralising it making drinkable.
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