7.PS1.3--Pure Substance/Mixture/Chemical Change

What are iron filings and sulfur examples of?

• Compounds

• Mixtures

• Elements

• Solutions

Why is iron considered magnetic?

• Because it can be separated from sulfur

• Because it is attracted to a magnet

• Because it reacts with sulfur

• Because it is a non-metal

Can sulfur be separated from iron filings using a magnet?

• Yes, because sulfur is magnetic

• Yes, because sulfur is non-magnetic

• No, because sulfur is non-magnetic

• No, because sulfur is a compound

What happens when iron filings and sulfur are mixed together?

• They cannot be mixed

• They react without heating

• They form a compound immediately

• They form a mixture that can be separated

Tags

NGSS.MS-PS1-2

What is needed to start the reaction between iron filings and sulfur?

• Heat

• Pressure

• Electricity

• Water

What type of reaction occurs when iron filings and sulfur react?

• Endothermic

• Reversible

• Exothermic

• Physical

Tags

NGSS.MS-PS1-2

What is the new compound formed from the reaction of iron and sulfur?

• Iron sulfate

• Sulfuric iron

• Iron sulfide

• Iron sulfur

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Why does iron sulfide have different properties from iron and sulfur?

• Because it is a solution

• Because it is a mixture

• Because it is a compound with chemical bonds

• Because it is heated

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Is the newly formed iron sulfide magnetic?

• Yes, like iron filings

• Yes, but less than iron filings

• No, because it is a compound

• No, like sulfur

Tags

NGSS.MS-PS1-2

What is the main difference between a mixture and a compound?

• A compound is always liquid

• A mixture has chemical bonds

• A compound can be separated physically

• A mixture can be separated physically