Heat Check #1

A student wanted to make a salad. The student weighed each vegetable before cutting and placing it in the salad. Which best describes the weight of the salad compared to the total weight of the vegetables?

• The total weight of the vegetables will be the same as the weight of the salad because the vegetables did not lose or gain weight.

• The total weight of the vegetables will be more than the weight of the salad, because cutting the vegetables increased their weight.

• The total weight of the vegetables will be less than the weight of the salad, because the vegetables weigh less when they are cut.

• The weight of the salad will be more than the total weight of the vegetables, because the vegetables were chemically changed.

Which of these are chemical changes to matter? (Select all that apply.)

• Mixing Baking Soda and Vinegar

• Cutting Paper

• Freezing Water

• Rusted Metal

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of these are physical changes to matter? (Select all that apply.)

• Mixing Baking Soda and Vinegar

• Cutting Paper

• Freezing Water

• Rusted Metal

Marcus was given a mystery mixture in science class. The mystery mixture weighed 80 grams. After sorting the mixture’s contents into four groups, he weighed each group and got the following results. What is the most likely weight of group 4?

• 6

• 15

• 28

• 43

Figure 1 diagram shows an ice cube in a cup. Figure 2 shows the ice cube melted to water in the cup. Which property of the ice cube remains the same both before and after it melted?

• color

• weight

• shape

• temperature

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Which best explains what happens to the inside of an egg when it is boiled?

• The liquid becomes solid.

• The solid becomes a gas.

• The solid becomes a liquid.

• The liquid becomes a gas.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Jennifer left her bike outside, buried in snow. In the spring, when the snow melted, she found her bike covered in rust. Which best describes the change to the bike?

• It was a chemical change, because the bike was a different color.

• It was a chemical change, because the rubber tires were deflated.

• It was a chemical change, because rust can be removed from the metal.

• It was a chemical change, because rust is a new substance on the metal.

Tags

NGSS.MS-PS1-2

Which example best describes a physical change?

• baking a pie

• burning a candle

• making a paper airplane

Which is a physical change involving an egg?

• frying an egg

• boiling an egg

• breaking an egg

Water is boiled and water vapor forms. Which best describes this process?

• A chemical change occurs because a completely new substance forms.

• A chemical change occurs because the temperature of the water changes.

• A physical change occurs because the water disappears as it is absorbed by air.

• A physical change occurs because water and vapor are different states of the same substance.