How do climate scientists determine carbon dioxide concentrations for the ancient atmosphere?
What will be an ideal response?
When glacial ice forms from snow, bubbles of air are trapped inside the ice. These bubbles are archives of the past atmosphere composition. Scientists measure the carbon dioxide concentrations in the bubbles. The age of each analyzed sample is determined by observing the annual layering in the ice.
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The shape and nature of an urban landscape reflect the values and intentions of the people associated with it
Indicate whether this statement is true or false.
When you exercise, you can feel your body getting warmer, perhaps even starting to sweat. Why does exercise make you warmer?
A) Glucose oxidation speeds up during exercise to power muscular activities, and as a byproduct, extra heat is generated. B) Your body is using anaerobic respiration, which releases more heat than oxidation. C) More glucose is synthesized, requiring additional heat. D) Your body is using fermentation to produce alcohol, which takes heat to break down.
What is the most populous country on earth?
A) China B) Egypt C) Japan D) Pakistan E) Turkey
Which greenhouse gas is found in great quantities in permafrost soils?
A. Nitrous oxide B. Ozone C. Methane D. Carbon dioxide