Which TWO objects are most likely more dense than water? Choose TWO answers.

• Copper key

• Plastic ping-pong ball

• Glass lens

• Wooden cork

• Feather

A combination of two or more substances that can be easily separated.

• dissolve
• mixture
• solution
• physical property

One or more substances dissolve in another and cannot be easily separated.

• mixture
• solution
• dissolve
• solute

To break down into tiny pieces to small to be seen.

• solute
• solvent
• dissolve
• solution

Which statement is true?

• Oil is the most dense substance.
• Corn syrup is less dense than water.
• Oil is less dense than water.
• Oil and corn syrup have the same density but different masses.

Tags

NGSS.MS-PS1-2

True of False: A mixture can be easily seperated

• True

• False

Why does ice float in water?

• The ice would float it's a solid.

• The ice would float because it's dissolving in the water.

• The ice would float because it's less dense.

• The ice is matter and it takes up space.

Answer explanation

While each statement is true, the reason why ice floats in water is because it is LESS DENSE.

Check all the materials that would float in water?

• Styrofoam

• Ice

• Aluminum

• Plastic

Answer explanation

Styrofoam, Ice, and Plastic will float in water because they are less dense than water.

Tags

NGSS.5-PS1-3

Which physical property of matter determine whether an object sinks or floats in water?

• How big it is.

• How heavy it is.

• How warm it is.

• How dense it is

Answer explanation

How dense (mass and volume) something is determines whether something sinks or floats. Things that are denser will sink and things that are less dense will float. Size and weight do NOT determine if something floats or sink.

In the image above, what can you say about the floating red ball and the marbles at the bottom?

• The red ball is more dense.

• The red ball is less dense.

• The red ball has a greater mass.

• The red ball has a greater volume.

Answer explanation

Objects that are less dense will float and objects that are more dense will sink. Therefore, the ball has to be less dense to float.

Tags

NGSS.MS-PS1-2