Comets are largely made out of
A) rock and ice.
B) hydrogen gas.
C) rock.
D) hydrogen compounds.
E) metal.
A) rock and ice.
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The path of totality for a solar eclipse is swept out by the tip of the Moon's umbra as the umbra moves over Earth
a. True b. False Indicate whether the statement is true or false
If a pizza absorbs more energy than it emits, its temperature
A) decreases. B) is unaffected. C) increases. D) none of the above
The different species of finches found on the Galapagos islands are evidence of Darwin's theory of natural selection because
A) all species are competing for the same resources B) they are capable of interbreeding with each other C) they have all evolved adaptations from a common ancestor to suit the environmental conditions found on different islands D) some species are more successful than others
Oxygen in Earth's atmosphere is outgassed in volcanic eruptions
a. True b. False Indicate whether the statement is true or false