1. the atmospheric gas that forms a mild acid when dissolved in water is (1 point)
carbon dioxide
oxygen
aluminum
sulfur
2. what would cause the inscription on a marble gravestone to become harder and harder to read over time? (1 point)
frost wedging
mechanical weathering
exfoliation
chemical weathering
3. which of the following is not a factor that affects the rate of weathering in rocks? (1 point)
biological evolution
climate
rock characteristics
amount of exposed surface area

The answers are;

1.Carbon dioxide in the atmosphere mixes with rainwater for form carbonic acid;

CO2 + H2O  H2CO3 (a reversible reaction)

It is a weak acid because it dissociates partly in water with a pH of about 5.

2.Chemical weathering on the marble gravestone is due to rain. The rain is slightly acid because it has to dissolve carbon dioxide to form carbonic acid. The carbonic acid dissolves marble  (composed of largely calcium carbonate);

H2CO3 + CaCO3  Ca(HCO3)2 aq (CaHCO2 is soluble)

3.Biological evolution does not affect weathering of rock. Climate does. The higher the temperatures the rainfall, the higher the rate of weathering. Soft rocks like limestone are easily eroded by rainwater that rocks like quartz. The higher the surface area of rock exposed to these elements the higher their rate of weathering.

answer: blah

explanation:

bc blah

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.