Unit 1 Concept Check A

__________ can be separated by physical means.

• Elements
• Pure Substances
• Compounds
• Mixtures

Flammability is an example of a(n)

• physical property
• physical change
• chemical property
• chemical reaction

Which of the following is a sign that a chemical reaction has occurred?

• change in shape
• melting
• formation of a gas
• dissolving

Tags

NGSS.MS-PS1-2

Brass (made of copper and zinc) is an example of a(n)

• solution

• heterogeneous mixture

• element

• compound

Matter is neither created or destroyed

• Law of Conservation of Energy
• Law of Conservation of Properties
• Law of Conservation of Mass
• Law of Conservation of Chemical

Matter 

• is everything, including energy.
• has mass and takes up space.
• has weight.
• only exists on earth.

Carbon monoxide (CO) gas is an example of a(an)

• solution
• heterogeneous mixture
• element 
• compound

Which of the following is NOT an evidence of a chemical reaction?

• freezing
• formation of gas
• production of light
• energy absorbed

The state of matter with the least particle movement and and energy is 

• plasma
• gas
• liquid
• solid

A mixture that must me continuously shaken or it will settle out is called a(n)

• colloid
• solution
• suspension
• compound