Physical vs. Chemical Change in Matter

A house made of toy blocks is weighed. It is taken apart and each block weighed separately. If the weight of all the blocks is added, what will it total?

• A little less than the weight of the house.

• The same as the house.

• A little more than the weight of the house.

• It would depend on how large the house was.

Water is boiled in a bottle with a balloon over the top. As the water heats, the balloon expands. What has happened to the weight of this bottle and balloon in this experiment?

• It has increased as the balloon expands.

• It has decreased as the water boiled away.

• It has stayed the same.

• It is unpredictable because the balloon is flexible.

Tags

NGSS.MS-PS3-4

5 grams of orange Kool Aid powder is added to 100 grams of water. What would you expect the new solution to weigh?

• 95 grams

• 100 grams

• 105 grams

• 500 grams

Tags

NGSS.MS-PS1-5

How do you know when something is a solid?

• It will pour.

• It takes the shape of its container.

• It cannot be seen easily.

• It will hold its shape.

Tags

NGSS.5-PS1-3

What evidence shows that ice has a physical change when left out in a room?

• It reacts with oxygen in the air.

• It changes to water

• It is hard and white.

• It is cold to the touch.

Tags

NGSS.MS-PS1-4

Which of Mark’s observations would show that a burning candle is a chemical reaction?

• Black smoke is given off; hot gases are rising.

• The wax starts to melt.

• The candle is white and made of wax and a wick.

• Time passes one minute at a time.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Which of Mark’s observations would show that a burning candle has physical changes?

• Black smoke is given off; hot gases are rising.

• The wax starts to melt.

• C. The flame glows red and orange.

• D. Time passes one minute at a time.

Tags

NGSS.MS-PS1-2

How might reactions with burning be important in your daily life?

• Food is grown by burning

• Modern medicines depend on burning.

• Most clean water is created by burning.

• Burning fuel supplies heat for homes.

Tags

NGSS.MS-PS3-3