Nature of Matter

In which of the following cases diffusion be the fastest?

• Solids

• Liquids

• Gases

• All of the three

Out of these which have the fixed shape and a definite volume?

• Solids

• Liquids

• Gases

• All of the three

Light does not pass through to a wall as it is is a/an ________ object.

• Transparent

• Translucent

• Opaque

• None of the above

Tags

NGSS.MS-PS4-2

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.

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

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

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

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

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

Zariah places water in a freezer. Several hours later, she observes that the water has frozen. Which statement BEST describes the arrangement and motion of particles in the ice?

• The particles have the least energy and vibrate in a fixed position

• The particles have more energy and are able to move past each other

• The particles have high energy and move about freely

• The particles have high energy, are charged and move about freely

Tags

NGSS.MS-PS1-4

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

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.

• 3, 5

• 2, 4

• 2, 4

• 3, 5

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5