1/29 8th Grade Quiz

The smallest unit of an element that still has the properties of that element is?

• a substance
• a mixture
• a compound
• an atom

Which of these is a pure substance?

• bread
• table salt
• garden soil
• sea water

Which of these is not an example of a molecule?

• CH4
• C
• C6H12O6
• H2O

Tags

NGSS.MS-PS1-1

Which of these is an example of a molecule?

• a small nugget of pure gold
• the smallest grain of salt in a salt shaker
•  a small drop of sugar water
• two oxygen atoms joined to a carbon atom

Tags

NGSS.MS-PS1-1

Which of these is a mixture?

• Uncooked chocolate chips and cookie dough blended together with a spoon.
• Distilled water
• A nugget of gold
• A molecule of Oxygen

Two or more elements chemically combined:

• an atom
• a compound
• a mixture
• a pure substance

Tags

NGSS.MS-PS1-1

A mixture that appears to be evenly mixed throughout:

• an atom
• a compound
• a homogeneous mixture
• a heterogeneous mixture

 mixture that does NOT appear to be evenly mixed throughout:

• an atom
• a compound
• a homogeneous mixture
• a heterogeneous mixture

A pure substance that cannot be separated into simpler substances by chemical or physical means.  

• Element
• Compound
• Mixture
• Chemical

Tags

NGSS.2-PS1-1

Salt is a _________. 

• compound 
• element 
• mixture 

Tags

NGSS.MS-PS1-1