Unit 4A-Matter

Glucose, C₆H₁₂O_6, is considered to be a(n) ____

• element

• compound

• heterogeneous mixture

• homogeneous mixture

Tags

NGSS.MS-PS1-1

Uranium, U , is considered to be a(n) _____

• element

• compound

• heterogeneous mixture

• homogenous mixture

Which particle model represents an element?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-1

What type(s) of mixture is shown in the picture?

• homogeneous mixture

• heterogeneous mixture

• colloid

• suspension

Table salt, NaCl, is a _____.

• mixture

• pure substance

• suspension

• colloid

Tags

NGSS.MS-PS1-1

Which of the following statements describes a difference between a mixture and a pure substance?

• The density of a mixture can change with temperature, but the density of a pure substance cannot change.

• The composition of a mixture can vary from sample to sample, but the composition of a pure substance is always the same.

• A mixture has a specific melting point, while the melting point of a pure substance can vary.

• A mixture tends to be homogeneous, while a pure substance tends to be heterogeneous.

Which procedure correctly describes materials combining into a homogeneous mixture?

• Sand and water are shaken in a container and left to separate into two substances

• Olive oil is added to water

• Salt is sprinkled on popcorn

• Sugar is add to water

Which phase change absorbs heat energy (endothermic)?

• freezing

• condensation

• sublimation

• deposition

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which is a phase change that releases heat (exothermic)?

• vaporization

• condensation

• melting

• sublimation

What phase change is represented by letter C?

• condensing

• freezing

• vaporization

• sublimation

Tags

NGSS.MS-PS1-4