The statement 2 + 2 = 4 would be considered a in the science world.

hypothesis

How many variables are altered in a good experiment? a.1 b.0 c.2 d.3

Why can't you grow plants with adhesion water?

Biomass can be used to generate electricity. biomass relies heavily on agricultural crops. plants release carbon dioxide and water in combustion. plants use photosynthesis to originally generate the energy that is needed. the chemical energy of these plants all started with what energy source?