Classifying Matter

What can correctly be assumed about a sphere made of the same kind of rubber?

• It will have the same diameter.

• It can insulate electricity.

• It will have the same length.

• It will sink in liquids.

Tags

NGSS.MS-PS1-2

Which of the following tests will be most helpful in confirming the identity of the powder?

• Adding a small amount of vinegar to the powder.

• Dissolving the powder in a beaker of water.

• Testing the electrical conductivity of it in solution.

• Comparing the color of the powder to the other powders.

Based on the data, Wyatt can conclude that which container was the best insulator of heat?

• Container 1

• Container 2

• Container 3

• Container 4

Tags

NGSS.MS-PS3-3

The boiling point of acetone is 50.5 degrees celsius, while the boiling point of water is 100 degrees celsius.

Bringing a solution made of water and acetone to which of the following temperatures would allow the separation of these two liquids?

• 49.5

• 60

• 100

• 150.5

Based on Lillian's data, which object has the greatest density?

• Object 1

• Object 2

• Object 3

• Object 4

The students found a smaller block of aluminum that is only 1 cm by 1 cm by 1 cm.

Which property do we expect to observe in the smaller block?

• Has a mass of 2.8 kg.

• Floats in water.

• Conducts electricity.

• Attracted to a magnet.

Based on the observations, what can be concluded about the densities of the balls?

• Substance 1 has the highest density of all 4 substances.

• Substance 4 has the lowest density of all 4 substances.

• Substances 1 and 4 have higher densities than substances 2 and 3.

• Substance 2 has lower density than substance 3.

Based on the data, which material was the best insulator of heat?

• Material 1

• Material 2

• Material 3

• Material 4

A 1,000-mL sample of ethanol is tested. Its boiling point is determined to be 78.4 degrees celsius.

What is the most reasonable prediction of the boiling point for a 100-mL sample of ethanol?

• 0.078.4

• 0.784

• 7.84

• 78.4

Which of the samples is cork?

• Sample 1

• Sample 2

• Sample 3

• Sample 4