Chemical/Physical Changes

What happens to a substance when a physical change happens?

• A substance may change color or state. There is a new substance formed.

• A substance may change color or state. There is no new substance formed.

• A substance may change shape, size, or state. There is a new substance formed.

• A substance may change shape, size, or state. There is no new substance formed.

Which of the following examples would be a physical change?

• Baking a cake

• Boiling water

• Burning wood

• Lighting fireworks

When cooling water, what type of physical change will most likely occur?

• It will boil.

• It will condense.

• It will freeze.

• It will melt.

Tags

NGSS.MS-PS1-4

Which of the following examples shows a physical change?

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• 
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Tags

NGSS.5-PS1-4

Which of the following statements best describes why cutting grass is an example of a physical change?

• The grass is changing color, which means no new substance is forming.

• The grass is changing shape, which means a new substance is forming.

• The grass is changing size, which means no new substance is forming.

• The grass is rotting, which means a new substance is forming.

Tags

NGSS.MS-PS1-2

Listed below are the four phase changes. Which two phase changes occur when heat is lost?

• I and III

• II and III

• II and IV

• III and IV

Tags

NGSS.MS-PS1-4

Megan likes to take hot showers before she goes to bed. She makes sure that the temperature of the water is warm enough to create steam. When she gets out of the shower, she has to wipe the mirror because there is so much water on it. Which statement best describes why there is water on the mirror?

• The steam collected on the mirror and got cooler, causing it to condense into water droplets.

• The steam collected on the mirror and got warmer, causing it to condense into water droplets.

• The steam collected on the mirror and then boiled, leaving behind water droplets.

• The steam collected on the mirror and then evaporated, leaving behind water droplets.

Tags

NGSS.MS-PS1-4

Veronica wanted to bake muffins. Her mom gave her some general instructions to follow, and she got her ingredients ready. Which steps in the baking process show a physical change?

• Steps I and II

• Steps II and III

• Steps I and IV

• Steps III and IV

Tags

NGSS.MS-PS1-2

Racheal observed water droplets on her window in the morning even though it did not rain. In the evening the water droplets had frozen. Select the statement that best describes how temperature is involved in these physical changes of water.

• Heat caused water in the air to condense to water droplets. More heat was added, freezing the liquid into ice on the window.

• The cold window caused water in the air to condense into liquid droplets. A decrease in temperature caused the water droplets to freeze into a solid.

• The hot temperature of the window caused the water to evaporate into droplets. The temperature dropped to freeze the water into a solid on the window.

• The water from the air condensed on the window. The water then melted, forming ice on the window.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

While dinner was cooking, Rachel noticed that there was steam coming from a pot of boiling water. Which of the following statements best explains why there is steam coming from the pot?

• There is a chemical change as the water is reacting with the pot to make steam.

• There is a chemical change as the water is evaporating, producing a gas.

• There is a physical change as a water is condensing, producing a gas.

• There is a physical change as the water is evaporating, producing a gas.

Tags

NGSS.MS-PS1-4