Unit 1/2 Review

Which of the following is considered to be a physical property of matter?

• Reactivity

• pH

• Solubility

• Toxicity

During an investigation, a student combined two substances as shown above. The student observed a decrease in temperature when the substances were combined. A milky substance was produced and fell to the bottom of the flask.

What is the most likely reason for these results?

• A portion of the substances crystallized.

• A solid appeared after the liquid evaporated.

• The combined substances chemically reacted.

• A portion of the substances dissolved.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS1-5

Which two physical properties are used to describe matter?

• Mass and reactivity

• Weight and toxicity

• Volume and pH

• Mass and volume

Students investigating four liquid samples recorded the following observations. Which of the samples is definitively identifiable as a pure substance?

• Sample W

• Sample X

• Sample X

• Sample Z

Tags

NGSS.MS-PS1-2

Which of the following is considered to be a chemical property of matter?

• Viscosity

• Reactivity

• Texture

• Density

Which statement best describes why a gas is easily compressible while most solids are incompressible?

• The molecules of a gas are much smaller than those of a solid.

• The molecules of a solid are not attracted to one another.

• The molecules of a gas are much further apart than those of a solid.

• The molecules of a solid are much larger than those of a gas.

Tags

NGSS.MS-PS1-4

Indefinite shape and definite volume describe which state of matter?

• Liquid state

• Solid state

• Plasma state

• Gaseous state

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which of the following is a correct statement regarding mixtures?

• Mixtures are composed of a single substance.

• Mixtures are composed of more than one substance.

• Mixtures have a fixed composition.

• All substances in a mixture are visible at all times.

Substances with an indefinite shape and an indefinite volume are in which state of matter?

• Gaseous state

• Liquid state

• Solid state

• No state of matter fits this description

Tags

NGSS.MS-PS1-4

An increase in pressure increasing the boiling point of a liquid is an example of a —

• physical change

• chemical change

• physical property

• chemical property

Tags

NGSS.MS-PS1-4