Review Pure Substances and Mixtures

An _______________ is made up of one or more of the same kind of atom chemically combined.

• atom

• element

• molecule

• compound

True or False: elements AND compounds are pure substances.

• True

• False

A _________________ mixture is one where the substances are evenly spread throughout.

• heterogeneous

• homogeneous

• pure substance

Which of these is an element?

• Salt (NaCl)

• Water (H20)

• Oxygen (O)

• Carbon Dioxide (CO2)

A pure substance that cannot be broken down into other substances by chemical or physical means. 

• compound          
• atom
• mixture 
• element

Which of these is a compound?

• Aluminium (Al)

• Carbon Dioxide (CO2)

• Nitrogen (N)

• Sand

Tags

NGSS.MS-PS1-1

A combination of substances that can be physically separated from one another

• mixtures

• compound

• element

• molecule

a substance in which the parts are clearly different shapes and colors; different throughout

• mixture

• homogeneous

• heterogeneous

• element

What is a subscript?

• a number that comes after the symbol and tells how many atoms there are

• a number that comes before the symbol and tells how many neutrons there are

• a number that tells how many protons and neutrons there are in an atom

• a person who lives underground and writes the scripts to television shows

• element

• compound

• heterogeneous mixture

• homogeneous mixture

Tags

NGSS.MS-PS1-1