chem unit #1 test review 2022

What process takes place when a gas turns into a liquid?

• condensation
• melting
• boiling

A change that occurs without changing the chemical makeup is a

• a heterogeneous mixture
• Color change 
• Physical Change

Dyes in water soluble markers may be separated by means of

• a heterogeneous mixture
• Liquid-Liquid Extraction
• Chromatography

The amount of matter in an object is its___.

• a heterogeneous mixture
• mass
• volume

Salt dissolved in water.

• a heterogeneous mixture
• solution
• element

The phase change where a substance changes from a solid directly to a gas is....

• a heterogeneous mixture
• sublimation
• vaporization

A chemical change can always be identified because...

• a heterogeneous mixture
• a new substance will form
• the color will change

Pure oxygen (O) is an example of...

• element
• a mixture
• a compound

What is a mixture? 

•  A mixture is two or more substances combined.
•  A mixture is two or more elements combined. 
• A mixture is two or more atoms combined. 

 What is a compound? 

• A compound is a substance made up of one kind of mixture.
• A compound is a substance made up of one kind of element.
• A compound is a substance made up of two or more elements.