The wavelengths of radiation emitted by Earth are ________
longer than those emitted by the sun
shorter than those emitted by the sun
about the same as those emitted by the sun
none of these
longer than those emitted by the sun
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The United States produces ________% of the global supply of coal but currently consumes ________% of the global demand.
A) 26.6%, 10.3%
B) 26.6%, 11.9%
C) 10.3%, 26.6%
D) 11.9%, 26.6%
E) 11.9%, 10.3%
The frequency of something within a given unit of area is
A) concentration. B) density. C) distribution. D) pattern. E) dispersion.
Although tropical rain forests are only about 2% of the earth's land surface, they contain about 50% of the world's land plant and animal species.
Answer the following statement true (T) or false (F)
One significant difference between an ionic bond, where electrons are taken from one atom and added to another atom, and a covalent or metallic bond, where electrons are shared, is ________
A) ionic bonds make a material more malleable than covalent and metallic bonds B) ionic bonds are stronger than covalent or metallic bonds C) ionic bonds produce ions but covalent and metallic bonds do not produce ions D) ionic bonds do not result in the attraction of oppositely charged atoms, but covalent and metallic bonds do