Differentiate between molecules and compounds

Which phrase is the best summary of the model shown? a. the transfer of the sun's energy through trophic levels b. a series of aerobic and anaerobic reactions c. a transformation of light energy into chemical energy d. the breakdown of food molecules

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion

9. the history of life on earth is recorded in