Pure Substances

Carbon is considered an element while carbon dioxide is considered a compound. This is because carbon dioxide is –

• made of two different elements mixed together.

• made of two different elements bonded together.

• made of elements and compounds together.

Tags

NGSS.MS-PS1-1

The smallest particles of matter are called

• neutrons

• atoms

• electrons

• protons

Two or more substances physically combined and that can be separated is called —

• a compound 
• a pure substance
• an element
• a mixture

A substance made of only one type of atom is called —

• an element
• a mixture
• a compound

Matter is _______________________________.

• The amount of matter in an object.

• The amount of space an object occupies.

• Anything that has mass and volume.

When the temperature of matter decreases the particles ...

• speed up and move farther apart
• speed up and move closer together
• slow down and move farther apart
• slow down and move closer together

Tags

NGSS.MS-PS1-4

When the temperature of matter increases the particles ...

• speed up and move farther apart
• speed up and move closer together
• slow down and move farther apart
• slow down and move closer together

Tags

NGSS.MS-PS1-4

True or False: elements AND compounds are pure substances.

• True

• False

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