Earth's atmosphere blocks much of the light that astronomers need to observe distant stars. to get around this problem, nasa put a powerful telescope a) on mars. b) on the moon. c) in orbit around earth. d) in orbit around the moon.

The answer is;  C

By putting the Hubble telescope in orbit around the earth, they avoid most of the earth’s dense  atmosphere. The atmosphere causes a phenomenon referred to as atmospheric differential diffraction of light that is the reason we see stars as twinkling (yet they really don't twinkle). Avoiding atmosphere, therefore, improves image quality, reduces mirages, and reduces errors in observation.  

answer; i believe the correct answer is (data); /// good luck

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.