CH 4 Environmental Science

When two or more substances are combined so each substance can be separated by physical means, the result is a(n)____. 

• chemical change
• element 
• compound
• mixture

The scattering of light by colloids is called ____.

• air pollution
• suspension 
• conservation 
• The Tyndall effect

Matter that has a definite volume and a definite shape is a ____. 

• solid
• plasma
• liquid 
• gas 

Matter in which atoms are tightly held in place is a ____. 

• gas
• plasma 
• solid
• liquid 

A gas-like mixture with no definite volume or shape that is made up of positively and negatively charged particles is a ____. 

• solid
• gas 
• liquid 
• plasma

Matter with no definite volume and no definite shape is a ____.

• solid
• liquid 
• gas 
• plasma

Matter that has a definite volume but no definite shape is a ____.

• liquid 
• solid
• plasma
• gas

Matter in which the particles are free to move in all directions until they have spread evenly throughout their container is a ____.

• plasma
• liquid 
• solid
• gas

Most matter ____ when heated.

•  condenses
• solidifies
• expands
• contracts

The theoretical point at which all molecular motion stops is called ____.

• the boiling point 
• the melting point
•  absolute zero 
• the frozen point