Conductivity

Which of these materials is least useful as an insulator?

• Cardboard

• Aluminum

• Rubber

• Plastic

The ability of a metal to allow heat or electricity to pass through it.

• conductivity
• insulator
• mass
• density

What is the BEST example of a conductor? 

• A wooden block
• A ceramic mug
• A glass cup
• A metal bowl

Which of the following is NOT an insulator?

• Wool
• Plastic
• Copper
• Styrofoam

Gloves help keep your hands warm in winter because:

• They are conductors of heat.
• They are fuzzy.
• They are conductors of electrical energy.
• They are insulators.

Tags

NGSS.4-PS3-2

Heat transfers from an area of ____temperature to an area of ___ temperature.

• high to low
• low to high
• high to high
• It can travel high to low and low to high. 

A student touches a metal sink with her finger and notices that her finger feels cold.  Which of the following statements explains this observations?

• Heat energy flows from the student's finger to the metal.
• Heat energy flows from the metal sink to the student's finger.
• The student's finger was originally at the same temperature as the sink.

A barefoot student steps on a hot concrete surface. Most of the heat transferred to the student’s skin by this contact is by the process of—

• convection
• conduction
• vaporization
• radiation

The ability of a metal to allow heat or electricity to pass through it.

• conductivity
• insulator
• mass
• density

Which of the following increase the rate of conductivity?

• Large surface area

• Large temperature difference

• Small surface area

• Small temperature difference