Review (2) 6P3.3 Conductor/Insulators

A student is given three identically sized blocks. Each block is made of a different material. What characteristic of the blocks should be examined to find out which block is made of metal?

• color

• weight

• conductivity

• texture

Which of these describes the property of being a thermal insulator?

• lustrous

• does not conduct heat easily

• malleable

• has a low specific heat capacity

Tags

NGSS.MS-PS3-3

Which material is best for making electrical wires?

• aluminum

• copper

• glass

• wood

A copper wire with a wooden handle is being held in a flame. After a few minutes, which will most likely happen to the wire?

• The wire will reflect the heat from the flame.

• The heat from the flame will travel through the wire.

• The wire will be unchanged by the heat from the flame.

• The light from the flame will change to electrical energy in the wire.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Which best describes why wood is often used for handles on metal pans?

• Wood is a good conductor and transfers the heat energy.

• Wood is a good insulator and allows the metal to contract

• Wood is a good insulator and limits the transfer of heat energy.

• Wood is a good conductor and blocks the metal from expanding

Tags

NGSS.MS-PS3-3

The handle of a frying pan is often coated in rubber because rubber provides

• heat insulation.

• electric conduction.

• a low melting point.

• a nonstick surface.

Which BEST explains why a sleeping bag manufacturing company would use down feathers to stuff the bags?

• The feathers are a good insulator.

• The feathers are soft and will not be lumpy.

• The feathers are a good protection from rain.

• The feathers are easily replaced when they slip out.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

What can be concluded from the following statements about a property of metals?

•A cast-iron skillet on a stove is used to fry bacon.

•A metal spoon left in a pot of soup heating on a stove is too hot to touch.•

An aluminum playground slide gets hot on a summer day.

• Metals combine with nonmetals.

• Metals are good insulators

• Metals conduct electricity.

• Metals conduct heat.

Tags

NGSS.MS-PS3-4

Which is considered a good insulator of heat?

• aluminum, because it allows heat to flow easily

• glass, because it allows heat to flow easily

• plastic, because heat is unable to flow easily through it

• silver, because heat is unable to flow easily through it

Tags

NGSS.MS-PS3-3

In order for a material to be effective for cooking, it must have which physical property?

• low melting point

• high electric charge

• high reactivity with water

• low thermal expansion

Tags

NGSS.MS-PS3-3