TCI Lesson 22

A family goes camping and creates a to roast marshmallows. The next morning, the kids notice that the logs are no longer there, and all that remains are ashes. Which best explains why the ashes from a log are evidence of a chemical change?

• The color of the wood changed from brown to gray.

• The wood breaks down into smaller matter when burned.

• The ashes cannot be put back together to create a log again.

• Something was added to the log, and it cannot be removed.

Tags

NGSS.MS-PS1-2

When water freezes, a physical change has occurred. Which is most likely a property of the material by this physical change?

• It will never be a liquid again.

• It will be in the form of a gas.

• It can be changed back into its original form.

• It can take the form of any container it is put in.

Tags

NGSS.MS-PS1-4

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The Law of Conservation of Mass tells us matter can't  ______________.

• change color

• change state of matter

• be created or destroyed

• change temperature

Tags

NGSS.MS-PS1-5

Parker does a science investigation at home in which he puts one drop of food dye into a glass of cold water and watches what happens for 5 seconds. Then he does it again, but increases the temperature water. What do you predict will happen to the food dye when it is dropped into the glass with 140 degree F water, and why?

• It will mix throughout the water because the dye and water particles move faster when more energy is added.

• It will mix throughout the water because the dye and water particles move faster when more energy is removed.

• It will mix throughout the water because the dye and water particles move slower when more energy is added.

• It will mix throughout the water because the dye and water particles move faster when more energy is removed.

Tags

NGSS.MS-PS1-4

In order to make observations about how heat and could affect matter, you and your classmate are doing an experiment using water balloons. The observations you recorded throughout the experiment are listed. Steps: 1. Stretch the opening of a balloon over the mouth of the bottle. 2. Half fill one container with hot water and half fill the other container with ice. 3. Place the bottle in the hot water container for 60 seconds. Record your observations. 4. Move the bottle to the ice container for 60 seconds. Record your observations. Observations: *Balloon inflates when bottle is in hot water container. *Balloon deflates when bottle is in ice container. What statemen BEST explains the observations recorded during the experiment?

• Adding energy caused the air particles in the balloon to react and form different substances.

• Adding energy caused the air particles in the balloon to expand, removing energy caused them to contract.

• Adding energy caused the air particles in the balloon to move more slowly, and removing energy caused them to move faster.

• Adding energy caused the air particles in the balloon to dissolve into the latex, while removing energy caused them to separate.

Tags

NGSS.MS-PS1-4

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Heating matter can cause the properties of matter to change because you are

• adding energy.

• removing energy.

• mixing substances.

• dissolving substances.

Tags

NGSS.MS-PS1-4

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When you cool a filled balloon in the freezer, it will ____.

• melt

• contract

• expand

• evaporate

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Why does bending a glow stick cause it to glow?

• It heats two liquids.

• It dissolves one of the liquids.

• It separates the mixture of liquids.

• It causes a reaction between two liquids.

Tags

NGSS.MS-PS1-2

This snowman has changed shape because some of the frozen snow it is made out of changed to a liquid water. What caused this change to the snowman in this image?

• It was poorly built.

• Heating by the sun added energy to it.

• The atmosphere removed energy from it.

• There was not enough snow to keep it from melting.

Tags

NGSS.MS-PS1-4

Liberty bought strawberries and put them in the refrigerator. Unfortunately, when she took them out a week later her strawberries looked like those in the photo. What should Sandra have done differently and why?

• She should have eaten the strawberries sooner because a refrigerator slows down, but does not stop the reactions that cause food to spoil.

• She should have left the strawberries out on the kitchen counter because the warmer temperatures would speed up reactions that cause spoiling.

• She should have left the strawberries out on the kitchen counter because the warmer temperatures would slow down the reactions that cause spoiling.

• She should have measured the temperature of the strawberries before placing them in the refrigerator because a large drop in temperature would speed up reactions that cause spoiling.

Tags

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