input with options: Q: When fossil fuel is burned the chemical energy is converted into what?   A:
output: thermal energy

input with options: Q: What organs filter wastes from blood so they can be excreted from the body?   A:
output: kidneys

input with options: Q: What is the term for a theoretical framework for describing evolutionary change in populations through the change in allele frequencies?   A:
output: population genetics

input with options: Q: What molecule consists of two atoms of hydrogen and one atom of oxygen?   A:
output:
water