Properties of Matter Part Two

Which type of scientist tests unknown substances at crime scenes?

• forensic

• investigator

• materials

• regulator

How are substances identified?

• by their properties

• scientists recognize them

• by interrogating the criminal

• with tiny labels on the atoms

What is the purpose of identifying crime scene substances?

• to solve crimes

• it is a fun puzzle

• to give someone a job

• to create new materials

What does conduct mean?

• to absorb

• to carry

• to expand

• to shock

Which material conducts electricity well?

• silver

• paper

• plastic

• wood

Which material conducts electricity poorly?

• fabric

• iron

• steel

• water

The property of how well a substance conducts or carries thermal energy is

What is heat transfer?

• Heat disappears from a substance

• Heat is created within a substance

• Heat moves to a different place

• Heat changes temperature quickly

What is thermal conductivity?

• carries electricity

• strengthens electricity

• carries heat

• strengthens heat

What does it mean to have high thermal conductivity?

• It stays cold

• It reflects light

• It vibrates slowly

• It is very hot