Elements, Compounds, Mixtures

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

• An element

• a compound

• a mixture

• a salt

A substance made of two or more PHYSICALLY combined substances is --

• a compound

• a mixture

• an element

• a salt

Which of the following are mixtures?

• water

• blood

• salt

• air

• soil (dirt)

Which of the following are compounds?

• water

• oxygen

• pizza

• salt water

• carbon dioxide

Tags

NGSS.MS-PS1-1

Which of the following are elements?

• Oxygen

• water

• salt

• Hydrogen

• Gold

2 grams of sugar is dissolved into 100mL of water that has a mass of 100 grams. What is the mass of the sugar water mixture?

• 202 g

• 102 g

• 100 g

• between 100 and 102 grams

Tags

NGSS.MS-PS1-5

After surfing in the ocean, a boy left his surfboard to dry in the sun. He later noticed that small white crystals had formed on the surfboard. Which of the following is the best explanation?

• The water evaporated and the salt was left on the surfboard

• Sand was attracted to the surfboard

• The surfboard reacted with the ocean and was rusting

• Fish from the ocean left scales on the surfboard.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Which of the following are ways to separate a mixture?

• Evaporation

• Using a filter

• Using a magnet

• Separating by hand

• Perform a chemical reaction

Which of the following can be classified as pure substances?

• Elements

• Compounds

• Mixtures

Iron and Carbon are heated and stirred to make steel. This is an example of a--

• mixture

• element

• compound

• salt

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS1-5