Unit 1 Retest

1. In which state of matter are the atoms or molecules packed tightly together in a fixed position?

• Liquid

• Gas

• Solid

What characteristic is common to atoms and molecules in both liquids and gases but NOT in solids?

• They have a definite shape

• They are tightly packed.

• They move around and take the shape of their container.

Tags

NGSS.MS-PS1-4

Which of the following statements is true about solids?

• Definite shape and definite volume

• NO definite shape and No definite volume

A ______________ mixture is one that does not have a uniform composition.

• heterogeneous

• homogenous

• pure substance

A _________________ mixture is one where the substances are evenly spread throughout.

• heterogeneous

• homogeneous

• pure substance

In a ______________, one substance is dissolved in another substance.

• solution

• suspension

• Colloid

What is the formula for density?

• density = mass x volume

• density = mass / volume

• density = mass + volume

• density = mass - volume

Jack has a rock. The rock has a mass of 14 g and a volume of 2 cm3. What is the density of the rock?

(Density= Mass/Volume)

• 7 mL

• 7 g/cm3

• 28 g/cm3

• 1/7 g/cm3

Tags

NGSS.MS-PS1-2

What is made up of only 1 type of atom or molecule?

• Mass
• Mixture

• Solid

• Pure Substance

Tags

NGSS.5-PS1-1

NGSS.5-PS1-3

Mixtures are different than pure substances because mixtures-

• have lower boiling points

• can be separated physically

• are less dense than pure substances

• contain only one type of atom