Energy Types
What form of energy allows your eyes to see objects around you?
Light energy
What device changes stored chemical energy into electrical energy?
Battery
What happens when energy changes from one form to another?
Energy transformation
What happens when light bounces off a mirror?
Reflection
What do we call a group of parts that work together to perform a job?
System
A student strikes a drum, causing it to move back and forth and make noise. What produces the sound?
Vibration
A student disconnects one wire from a working circuit. What happens to the flow of electricity?
It stops because the circuit is open.
A toaster changes electrical energy into what type of energy?
Thermal energy
What happens when light bends as it moves from air into water?
Refraction
What is the difference between energy transfer and energy transformation?
Transfer moves energy; transformation changes energy into another form.
What type of energy is produced by vibrations?
Sound energy
What is a path that allows electricity to flow called?
Circuit
A speaker changes electrical energy into what form of energy?
Sound energy
A dark shirt becomes warmer after sitting in sunlight. What happened to the light energy?
It was absorbed.
A student wraps a wire in plastic. Why does the plastic help protect the student?
Plastic is an insulator that resists the flow of electricity.
Food, batteries, and fuel all contain this type of stored energy.
Chemical energy
What type of circuit has a break and does not allow electricity to flow
Open circuit
A flashlight uses a battery. Explain the energy transformation from the battery to the light.
Chemical → electrical → light energy.
How are reflection and refraction different?
Reflection is when light bounces; refraction is when light bends.
A battery powers a flashlight. The flashlight produces light and becomes warm. Is this an example of energy transfer or transformation? Explain.
Transformation because chemical energy changes into electrical, light, and thermal energy.
What type of energy does a moving object have?
Mechanical energy
What is the flow of electric charges through a circuit called?
Current
A fan is plugged into an outlet. It spins, makes noise, and becomes warm. Name the three forms of energy produced.
Mechanical, sound, and thermal energy.
A student places a pencil in a glass of water. The pencil appears bent even though it is straight. Explain why.
Light refracts, or bends, as it travels between water and air.
A student builds a circuit using a battery, copper wire, a light bulb, and a plastic connector that breaks the electrical path. Why will the bulb not light, and what needs to change?
The circuit is incomplete. The plastic connector must be replaced with a conductor or the path must otherwise be completed.