Which of the following is the best description of the first law of thermodynamics?
a. Atoms cannot be created or destroyed.
b. Energy input always equals energy output.
c. Heat is a form of kinetic energy.
d. Solar energy is converted into chemical energy in living systems.
e. All of these answers apply to the first law of thermodynamics.
B
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Permafrost is characteristic of the ____ biome
a. tropical savanna b. Arctic tundra c. Taiga d. thorn woodland e. deciduous forest
Lightning results from electrical charge differences ____
a. carried through the thundercloud by hail nuclei b. between the leading and trailing edge of a thundercloud c. between the upper and lower parts of a thundercloud d. carried from the lower thundercloud to the ground by rain e. carried from the center to the edge of the lower thundercloud by wind
________ have the highest velocities
A) Secondary waves (S-waves) B) Surface waves C) Refracted S-waves D) Primary waves (P-waves)
In which of the following directions do most tornadoes move?
A. northwest to southwest B. southwest to northeast C. southeast to northwest D. south to north