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1. A by-product of respiration which is necessary for photosynthesis is______
oxygen
carbon dioxide
sugar
water vapor
2. A by-product of photosynthesis which is necessary for respiration is____
oxygen
carbon dioxide
sugar
water vapor
3. Select all that apply.
Exposure to excessive ultraviolet radiation can be harmful to your _____.
body
breathing
health
skin
4. X-rays are less dangerous to health than ultraviolet radiation.
True
False
5. The rapid reduction in life spans after Noah's flood may be due to _____.
reduction in shielding effects of the current atmosphere
a change in the properties of the atmosphere
increase in radiation after the flood
all of the above
6. Select all that apply.
The absence of meteorites within the Earth's rock layers indicates that _____.
the rocks formed rapidly
the rock layers are young
the rock layers are old
the rocks formed very slowly
7. The total amount of carbon dioxide in the atmosphere is estimated to have decreased by 10 to 15 percent since 1900.
True
False
8. Air pollution may have a greater effect on health than on atmospheric temperature.
True
False
9. The overall long-term effects of air pollution are not yet certain.
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