4th Grade Heat and Energy Review Ch. 5 & 7

True or False: Metal is a better insulator than wood.

• False

• True

Answer explanation

Metal is a CONDUCTOR of electricity, and wood is an INSULATOR.

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

What is the flow of energy from warmer objects to cooler objects?

• energy

• heat

• temperature

• cold

Answer explanation

Heat raises the temperature of cooler objects.

Tags

NGSS.MS-PS3-3

Shelly puts an ice pack on her leg. Which best describes what will happen to the ice pack?

• The heat from her leg will flow into the ice pack and warm it.

• The cold from the ice pack will flow into her leg and freeze it.

• Both the ice pack and her leg will freeze.

• Neither her leg or the ice pack will change.

Tags

NGSS.MS-PS1-4

Why do electricians wear safety clothing made of leather and plastic?

• It keeps them cool.

• They can reflect light energy.

• They can channel electricity.

• They are good insulators of electricity.

Which is the best conductor of electricity?

• a drinking glass

• a copper mug

• a rubber ball

• a plastic plate

An oven changes electrical energy into _______ energy?

• solar

• heat

• temperature

• baking

What will happen to this light bulb?

• It will light up

• It will not light up

• It will explode

• Nothing will happen

Answer explanation

The circuit is open, since there is a gap no electricity is flowing to the light bulb.

A string of Christmas lights has one bulb that is burned out. What happens to the rest of the lights in the series circuit?

• The rest of the lights will turn on.

• The other lights will not turn on.

• Only a few lights will turn on.

• The other lights will shine even brighter.

Answer explanation

Since this is a series circuit, the burned out bulb breaks the circuit and the other lights will have no electricity.

How is a SERIES circuit different from a PARALLEL circuit?

• In a series circuit, the electricity follows many paths. In a parallel circuit, the electricity follows one path.

• In a series circuit, the electricity follows one path. In a parallel circuit, the electricity follows many paths.

• A series circuit uses static electricity, and a parallel circuit uses current electricity.

• A series circuit is less likely to be broken than a parallel circuit.

Answer explanation

A series circuit follows one path.

A parallel circuit has many paths.

How do you increase the strength of an electromagnet?

• You wrap the wire around more times.

• You unwrap some of the wire.

• You find heavier items to test it on.

• You find lighter items to test it on.

Answer explanation

Increasing the number of wire wraps around the nail will increase the current and strength of the magnetic force.

Tags

NGSS.MS-PS2-3