Why is chemical cycling necessary for life on the earth?
What will be an ideal response?
The earth receives a continuous supply of energy from the sun, but it receives no new supplies of life-supporting chemicals. Organisms must continually recycle the chemicals they need in order to survive.
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____________ ____________ was the first to circumnavigate the world at high latitudes. What will be an ideal response?
Geologists are correlating past geologic events to see if there are correlations with climate changes
Indicate whether the statement is true or false
The North American Great Lakes:
a. occupy kettles. b. are large tarns. c. are oxbow lakes. d. occupy former river valleys deepened by glacial erosion. e. occupy deflation hollows scoured out by the glacial wind.
An earthquake with a high rating on the moment magnitude scale can receive a low rating on the Mercalli scale
Indicate whether the statement is true or false