The solar radiation we receive on Earth is the result of ________.
A. nuclear fission as carbon is split into any number of smaller atoms
B. the oxidation of combustible material within the Sun's core
C. the nuclear fusion of hydrogen into helium
D. nuclear fission as helium is split into hydrogen
E. the nuclear fusion of iron into hydrogen
Answer: C
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A volcanic mudflow is called a Lahar.
Indicate whether the statement is true or false.
Botulism toxin acts by doing which of the following?
A) inhibiting the synthesis of acetylcholine B) irreversibly inhibiting acetylcholinesterase C) reversibly inhibiting acetylcholinesterase D) preventing the release acetylcholine from vesicles
If nitrogen, N2, were pumped into your lungs at high pressure, what would happen to its solubility in your blood stream?
A) The greater the pressure, the greater the solubility. B) The greater the pressure, the lower the solubility. C) You cannot change solubility of a substance by changing the pressure. D) Nitrogen is not soluble in your blood.
Water enters the atmosphere by ____________________ from the ocean surface. Most of this water
condenses and returns to the ocean as ____________________. Fill in the blank(s) with the appropriate word(s).