Heat only travels in this direction unassisted.
What is from hot to cold?
When you jump off a high platform and fall to the ground, this energy decreases continuously during your fall.
What is potential energy?
This is what happens to the temperature of a parcel of air when it is compressed and no heat enters or leaves.
What is increases?
Riding your bike, you accelerate enough to double your speed, in doing so this is what happened to your kinetic energy.
What is quadrupled?
Einstein famously hypothesized that mass is equivalent to this.
What is energy?
In a mixture of air, a hydrogen atom and an oxygen atom move with the same kinetic energy. In comparing their speeds, you determine this.
What is the hydrogen atom moves faster than the oxygen atom?
The four means in which thermal energy can be transferred.
What is conduction, convection, radiation, and change of phase?