science HW question!?

if the sun didnt reach the surface, plants would _____

if plants _____, our CO2 and oxygen levels change.

Well, you need to think about what interactions there are initially between the atmosphere, land, and water.

This is a broad question with many potential answers, the first interaction that occurs to me is the hydrological cycle. Water from the sea is heated when sunlight passes through the atmosphere, causing evaporation. This water may then fall onto land as precipitation.

That's one interaction, now how would dust in the atmosphere affect that?

Well, the dust would prevent less sunlight from passing through it, reflecting it back into space. This would mean less evaporation. Hence, less precipitation onto land. It would result in a colder climate.

Concisely speaking, dust would affect the interaction between atmosphere, land, and water by reducing the amount of heat and light that can reach both water and land. It also affects the distribution, and retention of heat in the atmosphere; or a colder climate is created.

I don't know how much detail you want to go into, but you could also talk about vegetation, and weather systems. (and how they would be affects by dust in the atmosphere).

Hope I helped, even a little!

Dust in the atmosphere absorbs visible light but not infrared. So the land is darkened, but still warmed by sun light. Dust allows water vapor to condense when temperature falls, so rain is possible. Rain removes dust from the air.

Water vapor in the air is different because humidity reflects infrared. A cloudy day is cool because the sun's heat is reflected back into space, but a cloudy night is warm because the Earth's heat is reflected back to the Earth.

well, it would obviously block the rays from the sun from reaching the earth surface. without the sun's rays, organisms on earth will not be able to survive. as for the atmosphere and water.....

i have self assurance the answer is leptons. it really is a decrease case L. Quoting from wikipedia... "In physics, a lepton is a particle with spin, a million/2 (a fermion) that does no longer journey the sturdy nuclear stress. The leptons form a kinfolk of right now ahead debris that are different from the different conventional kinfolk of fermions, the quarks."