A group of students is given four small cubes of the same size and instructed to place them in a beaker of water. One cube floats to the surface of the water. Two of the cubes float in the middle of the beaker under the surface of the water. The last cube sinks to the bottom of the beaker. Which conclusion is best supported by what the students observed?

• Two of the four cubes are soluble in water.

• All four cubes have different masses.

• Each cube is made of a different type of solid material.

• One of the cubes is more dense than the other three.

Tags

NGSS.MS-PS2-4

Which statement correctly identifies two of the materials based on the classification of properties in the table?

• Material 1 is a rubber ball. Material 2 is a piece of cardboard.

• Material 2 is an aluminum washer. Material 3 is a copper wire.

• Material 3 is a piece of cardboard. Material 4 is an aluminum washer.

• Material 1 is a copper wire. Material 4 is a rubber ball.

Tags

NGSS.MS-PS1-2

Which statement BEST describes what happens as water changes from one state to another?

• As water is cooled, it freezes and changes from a solid to a liquid.

• As water is cooled, it condenses and changes from a gas to a liquid.

• As water is heated, it evaporates and changes from a liquid to a solid.

• As water is heated, it melts and changes from a gas to a solid.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Students observe a glass of ice and water. The glass is dry on the outside. After ten minutes students see drops of water on the outside of the glass. Which statement best explains the students’ observations?

• The water vapor in the air changes to a liquid when it touches the cold glass.

• The cold water inside the glass rises and then slides down the outside of the glass.

• The ice in the glass melted and caused the water to overflow the glass.

• The water moved to the outside surface through tiny holes in the glass.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

A rock with a mass of 70 grams is dropped into a graduated cylinder with 30 mL of water in it. The water level rose as shown. Calculate the density of the rock in g/mL. The density of the rock is (a)  

• 14 g/mL
• 30 g/mL
• 70 g/mL
• 5 g/mL

Tags

NGSS.MS-PS1-2

This object ​ ​ (a)   in water,

so we know its density is ​ (b)   .

• Sinks
• greater than 1
• Floats
• less than 1

Tags

NGSS.MS-PS1-2

Match the following

• Top Liquid

• More dense than the blue layer but less dense than the clear layer

• Black ball

• The most dense

• White ball

• The liquid with medium density

• Silver ball

• The least Dense

• Blue liquid

• The liquid with the least density

Tags

NGSS.MS-PS1-2

Is oil more or less dense than water?

• Reasoning

• Because the oil floated on the water, I know it is less dense.  Objects less dense than water float. 

• Evidence

• Oil is less dense than water.

• Claim

• The oil floated on top of the water.

Match the following:

Water has a density of 1. Calculate the likely density of each of the objects below:

• 1.00

• C - green

• 1.50

• B - orange

• 0.87

• A - yellow

A group of students builds a model showing the process of planetary differentiation, using liquids of different densities measured in grams per millimeter cubed. The table lists the liquids and their densities.

Match each color in the graduated cylinder to the letters in the table based on density.

a

b

c

d

e

T

S

Q

U

R