Homework Help for Science (page 4)
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Why couldn't you stand on the sun's surface?
A) The Sun has no surface at all, the photosphere is an illusion.
B) You could stand on the surface.
C) The Sun doesn't have a solid surface.
D) The Sun's surface is too highly magnetized for anything to survive there.
E) You could stand on it if a sufficiently protective spacesuit could be designed.
which of the following statements accurately describes nuclear fusion reactors?
a) Fusion reactions require very high temperature
b) Nuclear fusion occurs in Earth's crust.
c) Fusion reactions can fuse three isotopes of hydrogen into one helium.
d) Fusion would be a more advanced technology if governments had provided some money for research or if attempts to develop it were more than just a few years old.
What would be the expected effect on plants if the atmospheric CO2 concentration was doubled?
A) All plants would experience increased rates of photosynthesis.
B) C3 plants would have faster growth; C4 plants would be minimally affected.
C) C4 plants would have faster growth; C3 plants would be minimally affected.
D) C3 plants would have faster growth; C4 plants would have slower growth.
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