Classifying Matter

How would you classify a container of muddy water?

• homogeneous mixture

• heterogeneous mixture

• a compound

• a solution

Which of the following is a physical change?

• folding a piece of paper in half

• burning a piece of paper

• an explosion

• a rotting banana

Which of the following is a chemical change?

• melting an ice cube

• freezing water

• evaporating water

• mixing iron and water to form rust

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which substance is most likely classified as a colloid?

• salt water

• milk

• sandy water

• paint

Based on the chart, which substance is a liquid at -175^oC?

• ethanol

• hexane

• methane

• methanol

Which of the following represents a chemical change?

• mixing two substances to create a gas

• melting a solid piece of metal

• measuring the densities of liquid water and ice

• dissolving salt in water

Tags

NGSS.MS-PS1-2

Why does your hand feel cold when holding an ice cube?

• heat flows from the ice cube to your hand

• heat flows from your hand to the ice cube

• cold flows from the ice cube to your hand

• cold flows from your hand to the ice cube

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4

What happens to molecules of water as they are heated?

• the gain kinetic energy

• they lose kinetic energy

• they lose thermal energy

• they move slower

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

In a solution of salt water, NaCl + H₂O, what is considered the solvent?

• the salt (NaCl)

• the water (H₂O)

• the Oxygen (O)

• The Hydrogen (H₂)

Which of the following is NOT considered a mixture?

• a compound

• a solution

• a colloid

• a suspension