Question by msmithcc: can someone answer these questions for me please?
1. The O2 (diatomic oxygen) in the atmosphere
a. was present since the earth was formed.
b. was emitted by volcanoes.
c. is the result of sunlight decomposing water vapor.
d. was produced by photosynthesis.
2.A planet that consists largely of compressed gases is
a. Mercury.
b. Venus.
c. Mars.
d. Jupiter.
3. Planets travel in
a. Nearly circular ellipses
b. Oblong ellipses
c. Circles
d. It depends on the planet
4. The spectrum of a star can provide information of which one or more of the following?
a. the star’s magnetic field
b. the star’s temperature
c. the star’s relative motion toward or away from us
d. the star’s composition
5. Nuclear reactions in the sun’s interior convert
a. hydrogen into helium.
b. helium into hydrogen.
c. carbon into nitrogen.
d. uranium into plutonium.
6. At the end of its lifespan, a very heavy star
a. breaks up into several smaller stars.
b. cools down into a white dwarf.
c. expands into a red giant.
d. explodes into a supernova.
Best answer:
Answer by SueBeeRoo
I’m not gonna help you cheat on your take home test.
Know better? Leave your own answer in the comments!