3.Test: Click Reset. Set the number of C atomsto seven. A. How many hydrogenmolecules (H2) will be needed for there to be no excess reactants? Use the slider to set the number of H2moleculesto this value. B.How many methanemolecules will be formed? C. Click Play. What happened?

The climate of the continental united states is generally 1. tropical 2. temperate 3. arctic 4. highland

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains

The picture represents the process that produces most of the energy used by living organisms on earth. which process is represented in the picture? a) the magnetic attraction between two hydrogen nuclei. b) the fusion of hydrogen nuclei to produce a helium nucleus in the core of the sun. c) the fission of hydrogen nuclei to produce a helium nucleus in the core of the sun. d) the chemical reaction between hydrogen nuclei to produce a helium nucleus in earth's atmosphere.