Thermal Energy and Particles
What do particles do when a substance is heated?
What is move faster?
What type of heat transfer occurs when two objects touch?
What is conduction?
What happens to the particles of most substances when they are heated?
What is their particles spread out/expand?
What provides energy to a simple electric circuit?
What is a battery?
In which direction does heat transfer occur between objects at different temperatures?
What is from the warmer object to the cooler object?
What is the transfer of thermal energy from a warmer object to a cooler object called?
What is heat transfer?
What type of heat transfer moves energy through electromagnetic waves?
What is radiation?
What happens to most substances when they cool down?
What is they move closer together/contract?
What must a circuit have for electric current to flow continuously?
What is a closed loop (circuit)?
What type of heat transfer allows energy from the Sun to reach Earth?
What is radiation?
What is the difference between temperature and thermal energy?
What is the average versus the total amount of kinetic energy of particles?
What type of heat transfer occurs when warm air rises and cool air sinks?
What is convection?
Which transfers thermal energy more easily: a metal spoon or a wooden spoon?
What is a metal spoon?
What happens when a switch opens a circuit?
What is the circuit is opened (broken), so the current stops flowing?
Why does warm air rise?
What is warm air expands, becomes less dense, and rises above cooler, more dense air?
What happens to particle motion when a substance cools down?
What is the particles move more slowly?
A metal spoon gets warmer when left in hot soup. What type of heat transfer is this?
What is conduction?
Why does a metal spoon feel colder than a wooden spoon in the same room?
What is metal conducts thermal energy away from your hand faster than wood does?
What is the purpose of wires in a simple circuit?
What is to provide a path for electric current to flow (to conduct electricity)?
A student places an ice cube in warm water. Which way does thermal energy move?
What is from the warmer water to the colder ice cube?
Two of the same objects have the same temperature, but one has more mass. Which object has more thermal energy?
What is the object with more mass?
Explain how all three types of heat transfer can occur when a pot of water is heated on a stove.
What is conduction transfers energy from the stove to the pot; convection moves energy through the water; radiation transfers energy through electromagnetic waves from the hot stove or burner?
A balloon is warmed and expands. Use particle motion to explain why.
What is the gas particles move faster and collide with the inside of the balloon more often and with greater force, causing it to expand?
A battery, wires, and buzzer are connected, but the buzzer does not sound. What is one possible reason?
What is the circuit may be open, a wire may be disconnected, or the battery may be dead?
A student says, “Cold moves from the ice cube into the warm water.” Explain why this statement is incorrect.
What is thermal energy moves from the warmer water to the colder ice? (The ice gains energy and melts; cold does not transfer as an energy substance.)