9. It is the hotness and coldness of the body.
a. Temperature
b. thermometer
c. heat
d. kinetic energy
10. What does the Second Law of Thermodynamics tell about heat?
a. Heat will always flow from colder substance to hotter ones.
b. Heat will always flow from hooter substance to colder ones.
c. Heat will always flow in any temperature of a substance.
d. Heat will always flow from colder substances only.​