Unit 1.2 Test

Evidence of Chemical Change.

• New Substance 
• Size change
• State change
• Mixture 

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Evidence of a physical change.

• New substance

• change in state of matter

• Light produced

• Gas released.

Which state of matter has the weakest forces between atoms

• Solid

• Liquid

• Gas

• Bose Einstein

A pure substance that cannot be separated into simpler substances by chemical or physical means.  

• Element
• Compound
• Mixture
• Chemical

Carbon Dioxide is a ______ 

• compound 
• element 
• mixtures 
• Battle of Bunker Hill 

Tags

NGSS.MS-PS1-1

Which of the following represents an element?

• H₂O
• H₂
• NaCl
• CaCO₃

This picture represents which of the following?

• element
• compound
• mixture of elements
• mixture of compounds

Tags

NGSS.MS-PS1-1

Pizza is a

• Element

• Compound

• Heterogenous Mixture

• Solution

When elements form mixtures, the elements keep their original properties. 

• True
• False

Which statement identifies why oxygen is classified as a pure substance and air is classified as a mixture?

• Oxygen is more reactive than air.

• Oxygen has a higher density than air.

• Oxygen goes under a phase change, whereas air is always a gas.

• Oxygen contains only one substance, but air contains several substances.