____________________ is a discharge of electricity, a giant spark, which usually occurs in mature thunderstorms.

Explain the reactions that occur in a nuclear power plant

What will be an ideal response?

The relationship between the dung beetles and the cattle is a type of

A) mutualism. B) parasitism. C) intraspecific competition. D) interspecific competition.

On the average, the "friction layer" extends to approximately ________ meters above the ground

A) 1 B) 10 C) 100 D) 1,000 E) 10,000

Which fuel is not considered biomass?

A. wood B. crop residues C. charcoal D. animal manure E. coal