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1-Why are scientists worried about the ozone hole? increase in skin cancer incre

ID: 997330 • Letter: 1

Question

1-Why are scientists worried about the ozone hole?

increase in skin cancer

increase in plant growth

decrease in ocean temperature

all of the above

2-Which type of radiation is effective at damaging DNA?

UV-A

UV-B

UV-C

visible

3- What does one Dobson unit (DU) equal?

1 ppb

1 ppm

100 ppb

100 ppm

4-What type of radiation is absorbed by molecular oxygen in the stratosphere?

UV-A

UV-B

UV-C

visible

5-Which type of chemical bond requires the least amount of energy to break?

single

double

triple

quadruple

A.

increase in skin cancer

B.

increase in plant growth

C.

decrease in ocean temperature

D.

all of the above

Explanation / Answer

1)A

2)A

3)A, DU isequal toapproximateley 1.25ppb

4)B

5)A