What are three common fossil fuels? A. coal, oil, natural gas
B. iron, lead, carbon
C. coal, gold, silver
D. solar, wind, water

The discovery that the universe appears to be expanding led to a widely accepted theory called a.) the big bang theory b.) the doppler effect c.) hubble’s law d.) solar nebular theory e.) the seyfert theory

In a system, when potential energy decreases, then entropy also decreases. true false

This is the substance(s) formed in a chemical reaction.