States of Matter and Temp
The Science of Forces
Thermal Energy Transfer
Conduction, Convection, Radiation
Energy Flow Systems
100
This is a measure of the average kinetic energy of the particles in a material.
What is temperature
100
If the net force acting on an object is zero, describe the object's state of motion according to Newton's First Law.
What is The object's motion does not change (it remains at rest or moves at a constant speed)?
100
Thermal energy is transferred in this direction between two substances with different initial temperatures.
What is from the warm substance to the cold substance?
100
This method of heat transfer involves the movement of currents in a fluid (liquid or gas), such as a hot air balloon rising.
What is convection?
100
What is the primary method of thermal energy transfer that causes the metal handle of a pot to get hot as it rests on an electric stove burner?
What is conduction?
200
When the temperature of a substance increases, this happens to the kinetic energy of its particles.
What is The kinetic energy increases?
200
A block being pulled at a constant velocity requires the student's pulling force to be equal to this opposing force.
What is the force of friction?
200
This state is reached when all objects in a system have the same temperature, and the net flow of thermal energy ceases.
What is thermal equilibrium?
200
What is the primary method of thermal energy transfer when you are cooking food by placing it directly on a hot skillet?
What is conduction?
200
When holding an ice cube in your hand, what is the primary method of heat transfer?
What is conduction (heat transfers from your hand to the ice)?
300
What is the glass of milk (the warmer substance)?
300
A boat is moving north at 3 m/s in a river with a current moving south at 1 m/s. If the current changes to 2 m/s south, how does the boat's net velocity change?
What is The boat's net speed slows down to 1 m/s north ($3 m/s - 2 m/s = 1 m/s)?
300
Describe the flow of thermal energy between a person and a cold metal chair they sit on.
What is Thermal energy flows from the warmer person to the colder chair?
300
Heat transfer by electromagnetic waves is the definition of this transfer method.
What is radiation?
300
How does an electric heater primarily warm a room without touching the objects or air?
What is radiation?
400
In the four models shown, the model that represents the substance at the lowest temperature is Model A, because its molecules are arranged like this state of matter. 
What is a solid?
400
A box is pushed with 50 N to the right, and the opposing friction force is 30 N to the left. What is the net force on the box, and in what direction will it move?
What is 20 N to the right?
400
A large swimming pool filled with cool water and a small pot of boiling water. Which system contains more total thermal energy, and why?
What is The large swimming pool, because it has far more particles, even though its temperature is lower?
400
Which two methods of thermal energy transfer rely on the collision or movement of particles?
What are conduction and convection?
400
When you use an air conditioner to cool a room, this is the primary method of heat transfer involved in circulating the air.
What is convection?
500
Given objects with an average kinetic energy of 1000J 2000J and 3000J, this object has the highest temperature.
What is the Object with $3000J of average kinetic energy)?
500
Using Newton's First Law, explain why a cyclist who stops pedaling will slow down instead of continuing to move at a constant speed.
What is The bicycle slows down because unbalanced forces (like air resistance and friction) act against its motion, and there is no forward force to counteract them?
500
If a hot metal block is placed in a well-insulated container of room-temperature water, describe the flow of energy and the final outcome.
What is Energy flows from the block to the water until they reach the same, intermediate temperature?
500
When a beaker of water is heated on a hot plate, describe the roles of conduction and convection in heating the water to a boil.
What is Conduction transfers heat from the plate to the beaker, and convection transfers heat through currents in the water?
500
A glass of water is placed in a sunny window. Explain the sequence of at least two thermal energy transfer types and the role of the glass cup in transferring energy from the sun to the water.
What is Radiation from the sun passes through the glass, heating both the glass and the water (direct radiation to the water is primary). Then, conduction transfers heat from the glass to the water molecules touching it, and convection transfers heat throughout the water as currents form?