Warm up 12/06/2024 Chemical Changes and Density Quiz

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

• Melting ice

• Burning wood

• Cutting paper

• Dissolving sugar in water

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the evidence of a chemical change when vinegar is mixed with baking soda?

• The mixture becomes cold

• A gas is produced

• The mixture turns blue

• The mixture becomes solid

Tags

NGSS.MS-PS1-2

Which of the following substances is likely to float on water?

• Iron

• Oil

• Gold

• Sand

If a substance has a density less than that of water, what will happen when it is placed in water?

• It will sink

• It will float

• It will dissolve

• It will evaporate

Explain why a color change might indicate a chemical change.

• Because it shows a change in temperature

• Because it indicates a new substance is formed

• Because it shows a change in state

• Because it indicates a physical change

Tags

NGSS.MS-PS1-2

How can you determine if a substance is more dense than oil?

• By checking if it dissolves in oil

• By observing if it sinks in oil

• By measuring its temperature

• By observing if it floats in oil

Describe a scenario where a precipitate is formed as evidence of a chemical change.

• Mixing salt and water

• Mixing vinegar and baking soda

• Mixing two clear solutions to form a solid

• Mixing oil and water

Tags

NGSS.MS-PS1-2

Compare the density of honey to water and predict what will happen when honey is poured into a glass of water.

• Honey will float on water

• Honey will mix evenly with water

• Honey will sink to the bottom

• Honey will evaporate