Exploring Physical and Chemical Changes in Chemistry

What type of change does ice undergo when it melts?

• No change

• Chemical change

• Physical change

• Biological change

Tags

NGSS.MS-PS1-4

What does the narrator use to illustrate a physical change?

• Dissolving of salt

• Rusting of iron

• Burning of propane

• Melting of ice

Tags

NGSS.MS-PS3-4

What happens to water molecules when ice melts?

• Molecules decompose

• Molecules remain the same

• New bonds form

• Molecules evaporate

Tags

NGSS.MS-PS1-4

What is required for propane to combust?

• Carbon dioxide

• Nitrogen

• Oxygen

• Hydrogen

What are the products of propane combustion?

• Carbon dioxide and water vapor

• Carbon monoxide and hydrogen

• Propane and oxygen

• Iron oxide and water

Tags

NGSS.MS-PS1-5

What energy change accompanies the combustion of propane?

• Release of energy

• Conversion to solar energy

• Absorption of energy

• No change in energy

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What type of change occurs when iron rusts?

• Physical change

• Chemical change

• State change

• No change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What new compound is formed when iron rusts?

• Iron oxide

• Iron hydroxide

• Iron chloride

• Iron sulfate

Tags

NGSS.MS-PS1-1

Is the dissolving of sodium chloride in water a physical or chemical change?

• Both

• Physical change

• Neither

• Chemical change

Tags

NGSS.MS-PS1-2

What happens to the ionic bonds of sodium chloride in water?

• They multiply

• They remain unchanged

• They break

• They strengthen

Tags

NGSS.MS-PS1-2