Substance and mixture

Which of these is an element?

• Salt (NaCl)

• Water (H20)

• Oxygen (O)

• Carbon Dioxide (CO2)

Air is:

• An element

• A compound

• A mixture

• None of these

A mixture that is uniform and well mixed is _____.

• homogeneous
• hetergeneous
• pure substance
• compoud

The picture shown here is what type of mixture?

• homogeneous
• hetergeneous
• pure substance
• element

___________ are the smallest unit of an element that maintains the properties of that element.

• Atoms

• Elements

• Compounds

• Mixtures

Tags

NGSS.MS-PS1-1

An _______________ is made up of one or more of the same kind of atom chemically combined.

• atom

• element

• molecule

• compound

4. What is the simplest form that cannot be broken down to anything simpler?

• A. element

• B. solution

• C. compound

• D. colloids

6. This type of mixture contains two or more substances that are visibly distinguishable.

• A. homogeneous

• B. heterogeneous

• C. solution

• D. suspension

10. If Jo wants to get the iron filings out of some sand, what could she use to separate these two solids?

• A. magnet

• B. evaporation

• C. decanting

• D. filter paper

Only liquid materials can make mixtures. 

• True
• False