Question

5)A soil profile includes all of the following EXCEPT;

	a)Hot liquid magma
	b)Top soil and organic layer
	c)Weathered and parent rock
	d)Subsoil 6)People have made land more vulnerable to erosion through the following; a)Clearing forests on steep slopes or with large clear cut areas. b)Overgrazing rangeland with more livestock than the land can support. c)All of the above. d)Overcultivating fields through poor planning or excessive tilling. 7)The following is true concerning the rotation of crops in a field; a)Only A. b)Farmers rotate soybeans with corn to help increase nitrogen in the soil. c)Return nutrients to the soil. d)Both A and B. 8)The use of inorganic synthetic fertilizers have resulted in the following; a)Greatly boosted our global food production. b)Less energy consumed in the production of the fertilizers. c)Fewer pollution problems with water supplies. d)None of the above 9)The following are true concerning pesticides EXCEPT; a)Exposure to pesticides has NO severe health consequences for people. b)Most of the pesticides are applied to agricultural land. c)Most pests evolve resistance to pesticides over time. d)As industrialized farming has increased, so has the use of pesticides. 10)Genetically modified organisms (GMO) are organisms that have been genetically engineered using a)Only choice B. b)DNA from several different organisms and different species. c)Only genes from similar organisms in the same species. d)Both A and B.

Answer 1

5. a)Hot liquid magma

Magma is a molten and semi-molten rock mixture found under the surface of the Earth, not included in the soil profile.

6.c)All of the above.

Deforestation, overgrazing and over cultivating the soil has made land more vulnerable to erosion.

7.b)Farmers rotate soybeans with corn to help increase nitrogen in the soil

Farmers use soybeans and other legumes in rotation with grass crops such as corn or wheat. Grass crops are unable to take their own nitrogen from the air so they either need the nitrogen in the soil that the legumes provide for them in crop rotation or they need a chemical fertilizer containing nitrogen.

8.d. none of the above

The overuse of synthetic fertilizers has caused pollution.

9. a)Exposure to pesticides has NO severe health consequences for people.

This is not true as the use of pesticides has caused many pollution problems and health problems.

10. d)Both A and B.

A genetically modified organism (GMO) is an organism or microorganism whose genetic material has been altered to contain a segment of DNA from another organism of the same species or another species.