(Q).
If most electricity in the United States is made in coal power stations, then what kind of power stations create most of the electricity in the United States? Answer choices: - coal - making - motors - energy - cars - made - heat - two
(A).
coal

(Q).
If plant reproduction often requires something that causes allergies, then what is required for plant reproduction? Answer choices: - By wind and rain - Something that is found on a cloud - fertilization occurs - Males and females - Something that comes from a volcano - Something that is invisible - Something that causes allergies - sperm and egg fuse
(A).
Something that causes allergies

(Q).
If the flow of heat into the system causes thermal expansion, then he flow of heat into the system causes what? Answer choices: - thermal shields - thermal detonation - thermal expansion - Plant growth is reduced - chemical reaction - Evaporation - kinetic energy - thermal heat
(A).
thermal expansion