Module 2 Energy Transfer

Which of the materials is a conductor?

• rubber
• chalk
• gold
• glass

What is one use for an insulator?

• It slows down the flow of electric current to produce heat and light.
• It stores electric energy for later use.
• It allows electric current to flow through it.
• It makes electricity charged objects safe to handle.

A good energy source for a simple circuit is

• a battery
• a copper wire
• a light bulb
• a switch

Dolphins communicate using special vibrations and sounds. How is this possible?

• Dolphins have very good hearing.
• The energy can flow easily through water.
• Dolphins make loud sounds only other dolphins can hear.
• The energy is transferred from one dolphin to another through sound.

Light travels in a _____ path.

• curved
• straight
• random

Why are sounds not heard in space?

• Space is too cold for sound waves to travel.
• There is too much matter to travel through in space.
• Space is a vacuum with few particles to travel through.
• Energy cannot travel in space.

How does sound energy travel?

• in strings
• in beams
• in pulses
• in waves

Sounds cannot travel through ________

A pom-pom launcher _____________

• transfers kinetic energy to thermal energy
• transforms kinetic energy to sound energy
• transforms stored energy to energy of motion
• transfers energy of motion to stored energy

When a student plays a guitar, how does the sound travel to reach your ears?

• using echos
• through potential energy
• through thermal energy
• through sound waves