Earth’s early atmosphere was very rich in oxygen (O2). Indicate whether the statement is true or false
F
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In the southern hemisphere, objects are deflected to the
A) right, but based on objects moving to the north or south only. B) left, but based on objects moving to the north or south only. C) right, irrespective of which way it is moving. D) left, irrespective of which way it is moving.
Which of the following is the National Capitol of Canada?
A. Toronto B. Ottawa C. Vancouver D. Montreal
What causes a decrease in oxygen levels beyond the sunlit layer?
A) The respiration from marine animals and bacteria B) The by-products of photosynthesis C) There are fewer animals present D) None of these choices
What collects on surfaces that are good radiators of heat (such as a car or blades of grass) when large amounts of the heat are lost during the night?
a. hail b. dew c. convectional precipitation d. frontal precipitation