Heat energy from solar radiation absorbed at the Earth's surface is known as ________.
A. blackbody radiation
B. terrestrial radiation
C. geothermal energy
D. solar heat
Answer: B
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Population change =
A.
(Births + Deaths) 
(Immigration + Emigration)
B.
(Births 
Emigration) + (Deaths 
Immigration)
C.
(Births 
Immigration) + (Deaths 
Emigration)
D.
(Births + Emigration) 
(Deaths + Immigration)
E.
(Births + Immigration) 
(Deaths + Emigration)
On the average, how much of the Sun's energy that is intercepted by Earth is reflected back to space?
10% 20% 30% 40%
Since 1900, greenhouse gas emissions associated with burning fossil fuels and deforestation have warmed Earth's atmosphere by approximately ________
A) 5°C B) 0°C C) 1°C D) 8°C E) 3°C
A rocket's acceleration increases when traveling upward from the ground due to
A. weaker gravity with increased height. B. a decrease in mass as fuel is burned and ejected. C. increasing applied net force. D. none of the above