Question

using words from the word boxes below, complete the paragraph about heat transfer. all matter has heat. heat is a form of energy caused by particles in an object that vibrate. the particles of an object vibrate faster the warmer the object will be. because particles of an object are always moving, heat transfer is always happening. heat always flows in the same direction: from hot to cold. heat transfer will stop once two objects reach the same temperature. this is known as equilibrium. there are three key ways that heat transfers. with objects, heat transfers when the objects come into direct contact with other things. this is known as conduction. heat transfer happens when there are different states of matter. because these two states of matter flow, or are warmer, less dense particles rise and cooler, more dense particles sink. this ongoing process is known as convection. heat can also be transferred through space (distance) in the form of radiation. all objects also take in, or absorb, some heat. all objects give off, or emit, some heat.

Explanation:

Filled in blanks based on heat - transfer concepts like conduction (direct contact), convection (due to density differences in fluids), radiation (through space), and basic facts about heat as energy related to particle vibration and heat - flow direction.

Answer:

All matter has heat. Heat is a form of energy caused by particles in an object that vibrate. The faster the particles of an object vibrate, the more heat the object will have. Because particles of an object are always moving, heat transfer is always happening. Heat always flows in the same direction: from hot to cold. Heat transfer will stop once two objects reach the same temperature. This is known as equilibrium. There are three key ways that heat transfers. With objects, heat transfers when the objects come into direct contact with other things. This is known as conduction. Solids, liquids and gases are different. Because these two states of matter are warmer, less - dense particles rise and cooler, more - dense particles sink. This ongoing process is known as convection current. Heat can also be transferred through space (distance) in the form of radiation. All objects also take in, or absorb, some heat. All objects give off, or emit, some heat.