Tropical climates are the most extensive climate regions, occupying 36% of Earth's land and ocean areas
Indicate whether the statement is true or false
TRUE
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In the healthy environment of a sustainable soil,
A) the levels of humus steadily decline, but the aeration increases. B) sandy or silty soils are steadily converted to clay soils. C) abundant populations of bacteria are steadily replaced by mycorrhizae. D) the humus-forming processes of topsoil is renewed by the addition of detritus and humus.
Pangaea is currently dated at
A) 4.6 billion years ago. B) 225 to 200 million years ago. C) 65 million years ago. D) the beginning of the Holocene. E) about half the timespan of Earth's existence.
Because there are no active plate boundaries in or near Canada, that country has no detectable earthquake activity.
Answer the following statement true (T) or false (F)
The conversion of solar to chemical energy in photosynthesis occurs when energy from a(n) _______ is transferred to a(n) _______.
Fill in the blank(s) with the appropriate word(s).