Which describes how mixtures differ from substances?

• Mixtures are homogeneous.

• Mixtures are liquids.

• Mixtures can be separated physically.

• Mixtures contain only one kind of atom.

Which image in the figure above is a model for a compound?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-1

Which is a chemical property?

• the ability to be compressed

• the ability to be stretched into thin wire

• the ability to melt at low temperature

• the ability to react with oxygen

Tags

NGSS.MS-PS1-5

You drop a sugar cube into a cup of hot tea. What causes the sugar to disappear in the tea?

• It breaks into elements.

• It evaporates.

• It melts.

• It mixes evenly.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which is an example of a substance?

• air

• lemonade

• soil

• water

The figure above is a model of atoms in a sample at room temperature. Which physical property does this sample have?

• It can be poured.

• It can expand to fill its container.

• It cannot easily change shape.

• It has a low boiling point.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-4

Which observation is a sign of a chemical change?

• bubbles escaping from a carbonated drink

• iron filings sticking to a magnet

• lights flashing from fireworks

• water turning to ice in a freezer

Tags

NGSS.MS-PS1-2

Zinc, a solid metal, reacts with a hydrochloric acid solution. Which will increase the reaction rate?

• cutting the zinc into smaller pieces

• decreasing the concentration of the acid

• lowering the temperature of the zinc

• pouring the acid into a larger container

Tags

NGSS.MS-PS3-3

In the figure above, what will be the mass of the final solution if the solid dissolves in the water?

• 5 g

• 145 g

• 150 g

• 155 g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which is NOT represented in a chemical equation?

• chemical formula

• product

• conservation of mass

• reaction rate

Tags

NGSS.MS-PS1-5