Unit 2 Science Quiz

What is a Conductor?

• a material through which heat or electricity flows rapidly, like metal.

• Stops the flow of energy.

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

What is an insulator?

• a material through which heat or electricity flow slowly; stops the flow; wood and wool

• allows the flow of energy to pass through easily

Electric Circuit

• a candle being lit

• a closed pathway or loop which electricity flows

True or False: Electric currents are classified as AC or DC according to the wires that carry them.

• True

• False

True or false: Different types of electric currents are needed to produce light, heat, and sound.

• True

• False

An electric current always flows in a closed path, or loop.

• True

• False

True or False: Copper wires can carry an electric current because copper is an excellent conductor.

• True

• False

A simple electric circuit connects a D-cell battery to a light bulb. What three changes in energy occur in this circuit? PICK 3

• electric energy to light energy

• thermal energy to chemical energy

• chemical energy to electric energy

• electric energy to thermal energy

True or False: Electric currents can be used to produce motion, sound, heat, or light.

• True

• False

Fill in the blank: Generators convert ______ energy to electrical energy.

• heat

• mechanical

• light

• sound

Tags

NGSS.HS-PS3-3