Unit 2:Matter

What is matter?

• Anything that has a mass.

• Anything that takes up space.

• Anything that can be classic as a solid, liquid, or gas.

• All the above

Answer explanation

Matter must all three of these. It must have a mass, takes up space, AND be classified as a solid, a liquid, or a gas.

Check the boxes that are examples of matter:

• Air

• Water

• Rainbow

• Steam

• Reflection

Answer explanation

Matter is anything that has a mass and takes up space. Rainbows and reflections do not have a mass, volume, and are not solids, liquids, or gases.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Check all the item(s) that can be separated using a magnet?

• Plastic Spoon

• Sand

• Steel Paper Clip

• Wood Chip

• Glass

Answer explanation

The only item that can be separated using a magnet is the steel paper clip because steel is the only item on the list that is magnetic.

Tags

NGSS.MS-PS2-5

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

What could this item be if it's magnetic, a solid, and sinks?

• wood pencil

• cooking oil

• iron nails

• aluminum foil

Answer explanation

Iron is one of the four metals that are magnetic. Nails are solid. Iron is a very dense material, so it will sink in water.

A triple beam balance is used to measure mass. What is the mass shown in the triple beam balance above?

• 607 g

• 167 g

• 107 g

• 67 g

Answer explanation

You read a triple beam balance by adding 100 + 60 +7 which gives you 167. The units of measurement of this balance is grams. Therefore, the mass is 167 g.

A triple beam balance is used to measure which physical properties?

• Mass

• Volume

• Temperature

• Sink or Float

Answer explanation

A triple beam balance is used to measure mass. If an object is 15 grams on a triple beam balance, it has a MASS of 15 grams.

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.