Unit test -7th grade

KCl₂

• Compound

• Element

• Mixture

Tags

NGSS.MS-PS1-1

Chocolate Chip Muffin

• Compound

• Element

• Mixture

Fe₂

• Compound

• Element

• Mixture

Tags

NGSS.MS-PS1-1

Salt (NaCl)

• Compound

• Element

• Mixture

Tags

NGSS.MS-PS1-1

What type of mixture is trail mix?

• compound

• heterogeneous

• homogeneous

All matter can be classified by their physical properties. Which substance can be classified as being soluble in water?

• Sand

• Paper

• Iron Filings

• Salt

Students perform an experiment and record their observations. The results are shown in the chart below.

What are the students most likely observing?

• Sinking and floating of objects

• Objects that are not magnetic

• Solids, liquids and gases

• Objects with the greatest density

The diagram below shows two identical containers and their ingredients.

Which diagram shows what will happen if the two containers are combined?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-2

The picture below is an electrical wire.

What is the most reasonable answer for using copper in an electrical wire?

• Copper is a good insulator of electricity.

• Copper is magnetic.

• Copper is a good conductor of electricity.

• Copper is shiny.

A student is dissolving sugar in water. What can the student do to make the sugar dissolve faster?

• Nothing, sugar will not dissolve in water.

• Add more water.

• Add ice to the water.

• Stir the solution.