Which statement is true about density?

• If an object is more dense than water, it will float.

• An object must be big to sink.

• If an object is less dense than water, it will float.

• An object must have a temperature of 25 degrees in order to float.

A student adds a marble to a graduated cylinder with 80 mL of water. Then the water level rises to 100 mL of water. What is the student’s purpose for this investigation?

• to find the mass

• to find the temperature

• to find the density

• to find the volume

Tags

NGSS.MS-PS1-2

The nail is ______________ because it contains ______________.

• buoyant; iron

• magnetic, atoms

• magnetic, iron

• straight, matter

Which statement is true about liquids?

• They retain their shape.

• They take the shape of their container.

• They are always the same temperature.

• They are invisible.

Which of these statements is true about gases?

• They fill the shape of their container.

• They have no fixed volume.

• They are always the same temperature.

• They have mass.

Tags

NGSS.MS-PS1-4

Which change occurs when lemon juice is mixed with water?

• the water becomes a solid

• the mass of the lemon juice decreases

• the lemon juice dissolves and spreads out evenly in the water

• the volume of the water decreases

Tags

NGSS.MS-PS1-2

Which of the following substances will dissolve in water?

• iron fillings

• vegetable oil

• sugar

• sand

Which list has only materials that are insulators?

• aluminum washer, copper wire, iron nail

• rubber ball, wooden block, paper clip

• gold ring, plastic chip, piece of cardboard

• rubber mat, wood chip, cotton ball

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Which of the following is the best conductor of electricity?

• glass rod

• cotton string

• plastic tubing

• copper penny

A teacher mixes a white powder into a beaker of water. The power cannot be seen in the water. The teacher then heats the mixture until the water evaporates and the powder can be seen again. Which property of the powder is the teacher demonstrating?

• solubility

• density

• conductivity

• mass

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4