Ty poured some sand into a pan. which ofther material should ty add to the pan in order to model stream erosion? a acid b plants c rocks d water

D water

Streams of water can either from river or oceanic water source can remove and transport materials from one place to another. The loose sediments from the bottom of the river or any other water source can also be removed by this process. This is called as stream erosion.

Water is the chief physical agent for stream erosion therefore, water should be poured along with the sand into a pan.

c. the complete loss of plant life in the area occupied by the surface mine

*100% CORRECT ANSWERS

Question 1  

Why is soil important to plants?

all of the choices are correct

Question 2  

Soil is a mixture of .

solids, liquids, and gases

Question 3  

Where does the organic material in soil originate?

decomposing plant and animal matter

Question 4  

Which layer of soil is most likely of greatest importance to plant growth?

O - organic matter

Question 5  

Which of the following areas would most likely have the deepest layer of topsoil?

grassland

Question 6  

Which of the following is defined as combinations of soil particles that vary in size and

aggregates

Question 7  

What are the two types of minerals?

metallic and nonmetallic

Question 8  

Which of the following readings is used to determine the availability of minerals?

all of the choices

Question 9  

Which of the following methods of extraction is the most damaging to the environment?

surface mining

Question 10  

Which of the following is a way in which surface mines impact an environment

ecologically?

soil erosion

Question 11  

What is the most likely consequence of open pit mining on plant life?

the complete loss of plant life in the area occupied by the surface mine

Question 12  

How is coal extracted from mountaintop removal mines?

Dynamite is used to break apart rocks and then draglines are used to remove the broken rock  and reach the coal.

Question 13  

Which of the following best explains why clear-cutting forests is more destructive than  selectively cutting down trees in forests?

Clear-cutting eliminates all trees leaving none behind to maintain soil fertility or house native  animals.

Question 14  

Which of the following statements about pesticides is true?

Pesticides prevent the destruction of crops.

Question 15  

National parks reduce the human impact on land by .

preventing human development

Question 16

What was an unexpected consequence of the green revolution?

The overuse of fertilizer lead to reduced crop yields over time.

Question 17  

Biological pest control involves .

using biological mechanisms to eliminate pests