Describe the carbon cycle
What will be an ideal response?
ANSWER: On land, carbon is held as biomass, in live plant material, and in dead material on the ground and in the soil. During photosynthesis, plants take up CO2 from the atmosphere and release oxygen while growing, the amounts varying by season. The addition of CO2 due to human activities is significantly larger than the plants and oceans can take up; thus, these activities add carbon into the atmosphere.?
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A neutron makes a better nuclear bullet than a proton or an electron because it
A. has the greatest mass. B. can be accelerated by electromagnetic fields. C. carries no electrical charge. D. all of the above
Which is not a part of Scandanavia
A. Norway B. Denmark C. Sweden D. Finland
The rock shown here, with sediment just visible to the naked eye, is a
A. shale. B. conglomerate. C. sandstone.
What has enabled the dramatic increase in milk production in developing countries?
A) refrigerated trucks that make the milkshed irrelevant B) rising incomes that permit urban residents to buy more milk products and an increase in milk yield per cow C) genetically modified cows that can produce more milk in harsh conditions D) global warming that causes more ideal land for dairy farms E) much more land dedicated to dairy farming