Stored Energy & Motion
What do we call energy that is stored and waiting to be used?
Potential energy
Can energy be created or destroyed, or can it only change from one form to another?
It cannot be created or destroyed; it can only change forms
What tiny parts of an atom move from place to place to create electricity?
Electrons
Thermal energy is the science term for what kind of energy?
Heat energy.
What force happens when two touching objects rub together, causing them to slow down and create heat?
Friction.
What do we call the energy of anything that is moving, like a rolling ball or running legs?
Kinetic energy
When you clap your hands together, the kinetic energy of your hands turns into what kind of energy?
Sound energy.
What do we call a complete, closed loop that electricity must travel through to turn on a light?
A circuit.
What root word found in thermometer, thermos, and thermostat means "heat"?
Therm.
If two identical toy cars are rolling down a ramp, which one has more kinetic energy: the fast car or the slow car?
The fast car.
When a roller coaster sits still at the very top of a high hill, what kind of energy does it have?
Potential energy
When electrical energy flows into a classroom light bulb, what two forms of energy does it turn into?
Light energy and thermal (heat) energy.
What word describes materials like metal paper clips or copper wires that let electricity flow easily?
Conductors
What special tool can turn energy from the sun directly into electrical energy?
Solar cells (or solar panels).
Why does it take much more energy to kick a heavy medicine ball than a light soccer ball?
The medicine ball has more mass.
What happens to energy when you stretch a rubber band and then let it go?
The stored potential energy turns into kinetic energy.
When you run fast during recess, your kinetic energy turns into what type of energy that makes you feel warm?
Thermal energy (or heat energy).
What word describes materials like plastic, wood, or rubber that stop electricity from flowing?
Insulators.
When you touch a metal slide on a sunny day, the thermal energy was transferred to the slide by the _______.
sun
When two cars crash into each other, where does their motion energy go?
It turns into sound energy, heat energy from friction, and crumpling metal.
Where does your body get energy to help you run and play?
From the food you eat.
Eating breakfast gives you chemical energy. What energy transformation happens when you use that energy to kick a soccer ball?
Chemical energy turns into kinetic energy.
Why are metal wires in power cords wrapped in plastic?
Plastic is an insulator that protects people from getting shocked by electricity.
If you place a metal spoon inside a hot bowl of soup, the spoon handle soon gets warm to the touch. What kind of energy moved from the hot soup into the metal spoon?
Thermal energy (or heat energy).
What safety feature built into cars is designed to absorb energy by bending during a crash to keep passengers safe?
Crumple zones.