Compared to life today the rate of diversification in early organism was probably
A) exactly the same as it is today
B) much slower than it is today
C) much faster than it is today
D) just slightly slower than it is today
C
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The ____________________ is a region around a star where liquid water can exist
Fill in the blank(s) with correct word
Based on our current theory of Earth's formation, the water we drink comes from
A) ice that condensed in the solar nebula in the region where Earth formed.
B) chemical reactions that occurred in Earth's crust after Earth formed.
C) chemical reactions that occurred in Earth's core after Earth formed.
D) material left behind during the giant impact that formed the Moon.
E) comets that impacted Earth.
0.45 kg of a metal at 90.°C is added to 0.40 kg of water at 20.0°C
(a) If the final temperature of the mixture is 26.°C, what is the specific heat of the metal? (b) If the water container has a significant heat capacity, will this increase or decrease the metal specific heat determined in part "a"given the same data?
A nuclear power plant is very similar to
A) nuclear bombs, but with more control. B) any conventional power plant, but with uranium as fuel. C) a photovoltaic solar cell power plant. D) all of the above E) none of the above