1. A substance is provided in a jar. The table includes the student’s observations. Use them to correctly identify the substance as a homogeneous mixture or heterogeneous mixture.

• A. The substance is a homogeneous mixture because the particles are evenly distributed.

• A. The substance is a heterogeneous mixture because the particles are evenly distributed

• A. The substance is a homogeneous mixture because the particles are not evenly distributed.

• A. The substance is a heterogeneous mixture because the particles are not evenly distributed.

1. Use the models of matter to BEST classify each substance.

• Model 1 is a compound, Model 2 is a mixture, Model 3 is an element

• Model 1 is a compound, Model 2 is an element, Model 3 is a mixture

• Model 1 is a mixture, Model 2 is an element, Model 3 is a compound

• Model 1 is an element, Model 2 is a compound, Model 3 is a mixture

Tags

NGSS.MS-PS1-1

Use the diagram to answer the question. Julian removes boiling water from a heat source and places it in a freezer. He then records the water’s temperature as it freezes. The diagram represents the data recorded.

Which segment of the diagram shows where the molecules of water will have the least energy?

• segment A

• segment B

• segment C

• segment D

• segment E

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

1. If thermal energy were removed from Model 3, which model BEST represents the new arrangement of particles?

• model

• model 2

• model 3

• model 4

Tags

NGSS.MS-PS1-4

1. According to the table, which substance would sink in water?

• helium

• mercury

• oxygen

• iron pyrite

Tags

NGSS.MS-PS1-2

1. Leah is conducting an investigation to determine the identity of an unknown substance. The following data was collected.

1. The substance is yellow.

2. The substance melts at 273 degrees Celsius.

3. When in the presence of a flame, the substance does not burn.

4. When placed in water the substance floats.

5. When the substance is added to hydrochloric acid, a gas forms and

temperature change occurs.

• 1, 3, 5

• 2, 3. 4

• 1, 2, 4

• 3, 4, 5

Tags

NGSS.MS-PS1-2

1. Melting crayons is an example of _____________.

• physical change

• physical property

• chemical change

• chemical property

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

While outside playing ball, Naisir slid on the ground and ripped a hole in his pants. Choose the statement that correctly identifies the type of change that occurred and the supporting evidence.

• A chemical change happened because a new substance was created.

• A chemical change happened because there was a permanent change to his pants.

• A physical change happened because there is not a new substance being formed.

• A physical change happened because he physically slid on the ground to cause the rip.

Tags

NGSS.MS-PS1-2

1. According to the section periodic table, how many protons are in oxygen?

• 6

• 8

• 10

• 16

Tags

NGSS.MS-PS1-1

Use the section of periodic table to determine what element is represented in the model.

• potassium

• lithium

• sodium

• beryllium

Tags

NGSS.MS-PS1-1