Heat Energy
What direction does heat energy always flow?
From hot to cold.
What is a conductor?
A material that allows energy to move through it easily.
Name the five forms of energy.
MELTS-Mechanical, electrical, light, thermal, & sound.
What is transferred when a baseball hits a bat?
Energy.
What causes sound?
Vibrations.
Annie puts hot pizza on a cool plate. Where does the heat flow?
From the pizza to the plate.
What is an insulator?
A material that slows or stops energy from moving through it.
What kind of energy does a running child use?
Mechanical energy.
What makes waves move across water?
Energy moving through the water.
Which vibrates faster: high pitch or low pitch?
High pitch=faster vibrations.
A metal spoon is in hot soup. What happens to the spoon's temperature and why?
It increases because the hot soup transfers heat to the cooler spoon.
Which conducts heat better: metal or plastic?
Metal
What kind of energy do you feel from the sun that warms the sidewalk?
Heat energy.
A paddle moves faster in water. What happens to the energy?
More energy is transferred, creating bigger waves.
Why does a red rubber band make a low pitch?
During the day, the sun warms the ground. At night, why do temperatures drop?
Heat leaves the warm ground and transfers to the cooler air.
Julio tests five containers. Which will cool off fastest-conductors or insulators?
Conductors cool off fastest because they let the heat escape quicker.
A student shines a flashlight at a small solar-powered car. After a few seconds, the car begins to move forward. Which two forms of energy are involved, and how does the energy transfer happen?
The flashlight produces light energy, which the solar panel changes into electrical energy. The electrical energy powers the car’s motor, causing motion energy so the car moves.
Put the energy transfer in order: hand-bucket-water-boat.
Hand hits bucket → bucket vibrates → waves form in water → boat moves.
Why does the sound of crashing dishes stop?
The dishes stop vibrating.
Describe heat flow in this situation: A cold ice pack is placed on a warm arm.
Heat flows from the arm to the ice pack, cooling the arm and melting the ice.
Identify whether each is a conductor or insulator:
-Copper
-Rubber
-Gold
-Foam
Copper – conductor
Rubber – insulator
Gold – conductor
Foam – insulator
A classroom windmill has blades connected to a small generator that lights up a bulb when a fan blows on it. Describe three transfers of energy that occur in this process.
1. The moving air from the fan has motion energy.
2. The moving air transfers energy to the windmill blades, causing them to spin (more motion energy).
3. The spinning blades transfer energy to the generator, which changes it into electrical energy that lights the bulb (light energy).
Explain why waves kept moving after the girl stopped moving her hands in the tub.
Energy was still traveling through the water even though her hands stopped.
Explain why grains of rice move on a speaker when music plays.
The speaker vibrates, causing the rice to move because sound energy travels through vibrations.