Classification of Matter

Which of the following are pure substances?

• solutions
• compounds
• homogeneous mixtures
• colloids

Which of the following is NOT a pure substance?

• milk
• oxygen
• water
• carbon dioxide

A substance that is made up of only one kind of atom is a(an)

• compound
• homogeneous mixture
• element
• solution

If an unknown substance CANNOT be broken down into simpler substances, it is 

• a compound
• an element
• a homogeneous mixture
• a heterogeneous mixture

If a material contains three elements joined in a fixed proportion, it is a(an)

• mixture
• solution
• atom
• compound

Tags

NGSS.MS-PS1-1

Water is a compound because it

• can not be broken down into simpler substances
• always has two hydrogen atoms for each oxygen atom
• is made of water atoms joined together
• is heterogeneous

Tags

NGSS.MS-PS1-1

Which of the following is a mixture?

• carbon dioxide
• silicon
• silicon dioxide
• sand

Which of the following is a characteristic of a mixture?

• has varying properties
• has a fixed composition
• contains only pure substances
• does not reflect light

A mixture that appears to contain only one substance is a(an)

• homogeneous mixture
• heterogeneous mixture
• compound
• element

Which of the following is a heterogeneous mixture?

• water in a swimming pool
• sugar water
• a jar of mixed nuts
• stainless steel