P.1.3

The drawing shows solid carbon dioxide changing into carbon dioxide gas.

Which statement describes the relationship between the solid carbon dioxide and the carbon dioxide gas after all of the solid has changed to gas?

• They have the same volume.

• The gas has less volume than the solid.

• They have the same mass.

• The gas has less mass than the solid.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

When iron combines with oxygen in a moist environment, rust forms because of a

• chemical reaction

• physical reaction

• change in density

• change in temperature

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which part of digestion is mainly a chemical change?

• Teeth break food into small pieces.

• Throat muscles push food toward the stomach.

• Stomach acids dissolve food into nutrients.

• Intestinal cells transport nutrients into the blood.

Tags

NGSS.MS-PS1-2

A group of students observed the formation of bubbles when water boiled. What happened to matter because of the physical change to the water?

• New matter was created in the bubbles.

• Old matter was destroyed as the water turned to gas.

• Matter was conserved when it changed form.

• The composition of the matter changed.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

List the steps of the scientific method

d

e

f

c

b

a

Analyze results

Draw conclusions

Communicate results

Ask a question

Conduct experiment

Form a hypothesis

Tags

NGSS.MS-LS1-5

Which letter represents amplitude? (a)  

• A

• B

• C

• D

• E

Tags

NGSS.MS-PS4-1

A beaker contains a sample of water with a mass of 325 grams. The water in the beaker is boiled and weighed again after it cools. The new mass of the water is 305 grams. In this example of the conservation of matter in physical changes,

• the mass is less after it cools because water has less mass as a gas.

• the mass of the water was 305 grams and the mass of the water vapor was 20 grams.

• the process of boiling destroyed 20 grams of the water and left 305 grams of water.

• the heat energy created by boiling water makes up the rest of the mass.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS1-5

Using a closed system, a student heats 100 milliliters (mL) of distilled water in a flask. The steam from the water is captured, cooled, and condensed as shown in the diagram.

How much water is MOST likely collected?

• 1 mL

• 10 mL

• 100 mL

• 110mL

Tags

NGSS.MS-PS1-4

NGSS.MS-PS1-5

Which is the BEST evidence that a chemical change has occurred?

• change of state

• release of energy

• temperature change

• formation of a new substance

Tags

NGSS.MS-PS1-2

When a marshmallow is toasted over a fire, which is the best description for what happens to the outside of the marshmallow?

• chemical change

• physical change

• enzyme creation

Tags

NGSS.MS-PS1-2