What percentage of the commercial energy used in the United States is wasted unnecessarily?
a. 13%
b. 23%
c. 33%
d. 43%
e. 53%
D
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What differences exist between tropical wet (Af), tropical monsoon (Am), and tropical wet and dry (Aw) climates? Do you expect to observe any significant differences in types of vegetation in these different climates groups?
What will be an ideal response?
If you could travel back in time to when the Earth first formed as a planet: What kind of life would you encounter?
- All types of life in water and land, except people.
- All types of life in water and land, including people.
- Animal and plant life in water, but none on land.
- Simple, one celled organisms.
- There would be no life on Earth.
The conflict between Hutus and Tutsis (in Rwanda and Burundi) spilled into neighboring countries, especially the Democratic Republic of the Congo
Indicate whether the statement is true or false.
Under the surface of the Earth, where would one expect a convection current directed toward the surface?
A) under continents B) under subduction zones C) in the core D) under mid-ocean ridges E) under plates