Elements, mixtures and compounds

These contain only one kind of atom. 

• element 
• compound 
• mixture 
• water 

Carbon Dioxide is a ______ 

• compound 
• element 
• mixtures 
• Battle of Bunker Hill 

Tags

NGSS.MS-PS1-1

Which of the following represents an element?

• H₂O
• H₂
• NaCl
• CaCO₃

Salt Water can be classified as:

• Element

• Compound

• Heterogeneous Mixture

• Solution

Which contains only elements?

• A

• B

• C

• D

Which contains a pure substance? (Choose all)

• A

• B

• C

• D

Tags

NGSS.MS-PS1-1

Which is a heterogeneous mixture? (Choose all)

• 1

• 2

• 3

• 4

Which is the best example of a pure substance?

• pizza

• gold

• saltwater

• air

Tags

NGSS.MS-PS1-4

Earth’s air is made up of molecules of different gases that are not joined chemically. Which term best describes air?

• compound

• mixture

• pure substance

• element

Brass is a metal that is bright red and gold. It is formed by combining, not chemically, two elements, zinc and copper. Based on the information, how would brass be classified?

• an element

• compound

• mixture

• suspension