Question

What do you call the variables in an experiment that remain the same in all test groups?
A. Experimental Variables
B. Responding Variables
C. Controlled Variables
D. Consistent Variable

Answer 1

Controlled variables

Answer 2

Which logging practice is the cheapest but causes the most destruction of habitat?
A. Contour cutting
B. Clear-cutting
C. Selective cutting
D. All management strategies destroy the same amount of habitat.

Answer 3

b

Answer 4

Antibiotics have been used to treat bacterial ear infections in children. The bacteria are no longer affected by some of these antibiotics. What do you call this development in the bacteria?
A. Resistance
B. Coevolution
C. Speciation
D. Genetics

Answer 5

(A) Resistance

Answer 6

What do you call the variable in an experiment that you measure, also called the dependent variable?
A. Responding Variable
B. Controlled Variable
C. Tested Variable
D. Experimental Variable

Answer 7

I'd lean towards (A) Responding Variable. It's another name for a dependent variable.

Answer 8

What human activity includes raising wheat?
A. Industry
B. Logging
C. Mining
D. Agriculture

Answer 9

That's definitely (D) Agriculture.

Answer 10

Which of the following is not a result of heavy use of irrigation water?
A. Leaching of nutrients
B. Increase in salt concentration of the soil
C. Increase in soil fertility
D. Water shortages in western states

Answer 11

I'd probably go with (C) increase in soil fertility. Heavy irrigation, or excessive use of it, can result in the other damaging choices.

Answer 12

What occurred during the industrial revolution?
A. Increased use of firewood
B. Decreased use of resources
C. Decreased use of coal
D. Increased use of fossil fuels

Answer 13

Controlled variables
And increased use of fossil fules

Answer 14

Which is not a possible cause of famine?
A. war
B. food surplus
C. environmental degradation
D. disease

Answer 15

(B) Food surplus. If you have a lot of food to distribute, you shouldn't be suffering from a famine. War, environmental degradation, and disease can all lead up to famine conditions with the destruction of resources and people who can actually grow and harvest the food everyone needs.

Answer 16

Which of the following is considered an advantage of genetically modified foods?
A. The use of these crops may increase yields and help reduce food shortages.
B. The use of these crops may cause mutations in pest populations.
C. These crops may be cheaper to grow.
D. The use of these crops may have no health risks.

Answer 17

Antibiotics have been used to treat bacterial ear infections in children. The bacteria are no longer affected by some of these antibiotics. How could you describe the role of the antibiotics in this process?
A. Speciation
B. Resistance
C. Adaptation
D. Selective pressure

Answer 18

I'd probably go with (A) The use of these crops may increase yields and help reduce food shortages.

Answer 19

A. The use of these crops may increase yields and help reduce food shortages.
C. Adaptation