Changes in Matter

Which substance can be completely dissolved in water?

• Sand

• Flour

• Salt

Tags

NGSS.5-PS1-4

Which of these would NOT help salt crystals dissolve more quickly in water?

• Stirring

• Crushing the salt crystals to a fine powder

• Lowering the temperature of the water

Tags

NGSS.4-PS3-2

How could you separate a mixture of sand and salt?

• Mix with water, filter, and then evaporate the water

• Mix with water, evaporate, and then filter

• Filter and then mix with water

Will the steam from seawater be salty?

• Yes

• No

• Some of the steam will be salty

Tags

NGSS.5-ESS2-2

Why is nothing left behind when distilled water is evaporated?

• Because nothing was dissolved in it

• Because anything that was dissolved has evaporated

• Because nothing can dissolve in water

Tags

NGSS.5-PS1-2

Which of these is a reversible change?

• Metal rusting

• Baking a cake

• Freezing orange juice to make an ice pop

Which of these is an irrereversible change?

• Candle wax melting

• Candle wax burning

• ice cream melting

Tags

NGSS.5-PS1-4

What new materials are formed when a candle burns?

• Melted wax

• Water, carbon dioxide, and soot

• No new materials are formed

Tags

NGSS.5-PS1-4

NGSS.5-PS1-2

How could you change burnt paper back into its original form?

• Cool it

• Scrape off the soot

• You can't

Tags

NGSS.5-PS1-4

NGSS.5-PS1-2

Which of these statements is false?

• A reversible reaction produces new materials

• Chemical changes are usually irreversible

• Physical changes are usually reversible

Tags

NGSS.5-PS1-4