What caused our solar nebula to contract and spin, eventually creating the planets?
A) Gravitational interactions between particles
B) Gravitational attraction from black holes
C) Nuclear fusion joining atomic particles
D) Solar winds from nearby stars
Answer: A
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The Kyoto Protocol requires that developing nations reduce their greenhouse gas emissions to a level below their 1990 levels
Indicate whether the statement is true or false
The water cycle includes water in the
A) atmosphere, biosphere, ground, surface, and ocean. B) hydrosphere. C) oceans and atmosphere only. D) both A and B
El Niño occurs in conjunction with changes in this atmospheric phenomenon: ________
Fill in the blank(s) with the appropriate word(s).
Construction of a reservoir for a hydroelectric plant causes very few environmental and social problems.
Answer the following statement true (T) or false (F)