All _____________ has heat. Heat is a form of __________ caused by particles in an object that _______________. The _____________ the particles of an object vibrate, the _____________ the object will be. Because particles of an object are always moving, heat __________ is always happening. Heat always flows in the same direction: from ______ to ______. Heat transfer will stop once two objects reach the same _____________________. This is known as equilibrium.
There are three key ways that heat transfers. With ________ objects, heat transfers when the objects come into direct ____________ with other things. This is known as __________________. Liquids and gases are different. Because these two states of matter flow, or are ___________, heat transfer happens when warmer, _______ dense particles rise and cooler, ______ dense particles sink. This ongoing process is known as a _______________ current. Heat can also be transferred through space (distance) in the form of _________. This process is known as ___________________. All objects give off, or _______, some heat. All objects also take in, or ________, heat.