5.1 Test

Which of the following is an example of a chemical change?

• Melting ice

• Boiling water

• Rusting iron

• Cutting paper

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When a substance undergoes a physical change, it:

• Forms a new substance

• Changes state without altering its chemical structure

• Dissolves completely

• Releases heat

Tags

NGSS.MS-PS1-4

Burning wood in a fireplace is an example of a:

• Physical change

• Chemical change

• Reversible change

• None of the above

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which property is NOT an indicator of a chemical change?

• Color change

• Temperature change

• Melting point

• Production of gas

Tags

NGSS.MS-PS1-2

Which of these processes is reversible?

• Burning a candle

• Rusting of metal

• Melting of chocolate

• Cooking an egg

Dissolving sugar in water is an example of a:

• Chemical change

• Physical change

• Change in mass

• Change in density

A chemical change:

• Always requires heat

• Can be reversed by physical means

• Results in a new substance with different properties

• Involves only changes in state

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of these best describes a physical change?

• Leaves changing color in fall

• Baking a cake

• Shredding paper

• Lighting a match

Which of the following indicates a physical change has occurred?

• Color change

• Formation of a new substance

• Change in state

• Release of gas

Tags

NGSS.MS-PS1-4

What is the best prediction based on prior knowledge?

• All materials will complete the circuit.

• Only copper wire and aluminum foil will complete the circuit.

• Plastic will allow electricity to flow.

• None of the materials will complete the circuit.