Energy, Matter & Density

This diagram shows the particles that make up three different substances.

What state of matter does Substance 1 most likely exhibit?

• Solid

• Liquid

• Gas

• Plasma

Tags

NGSS.MS-PS1-1

In the lab, Ann cools a closed container containing 50 grams of steam until all of the steam becomes a liquid. She then cools the container until the liquid water freezes. Which remains constant during all of these changes?

• pressure

• mass

• state

• volume

Tags

NGSS.MS-PS1-4

The image shows four flasks of water at different temperatures.

Which flask contains the liquid with the lowest average particle speed?

• W

• X

• Y

• Z

Tags

NGSS.MS-PS1-4

Which statement is true about atoms when they are heated?

• They speed up and move closer together.

• They slow down and move closer together.

• They speed up and spread apart.

• They slow down and spread apart.

Tags

NGSS.MS-PS1-4

A helium balloon is taken outside on a very cold day. The balloon wrinkles and becomes a little smaller, but returns to its normal size when it is taken back inside the warm house. Why does the balloon inflate when it reenters the warm house?

• The warmer temperature causes the gas in the balloon to turn into a

  solid.

• The warmer temperature causes more gas to enter the balloon, and it

  expands.

• The warmer temperature causes the gas in the balloon to contract.

• The warmer temperature causes the gas in the balloon to expand.

Tags

NGSS.MS-PS1-4

A student is conducting an experiment and places a drop of dye in the corner of a water tank. Which temperature should the student make the water so that the dye spreads throughout the tank the fastest?

• –50°C

• 0°C

• 50°C

• 100°C

Tags

NGSS.MS-PS1-4

Iron can exist as a solid or a liquid. Which statement best compares solid iron and liquid iron?

• Solid iron and liquid iron have the same type of atoms.

• Solid iron and liquid iron have different types of atoms.

• Solid iron is an element, and liquid iron is a compound.

• Liquid iron is an element, and solid iron is a compound.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-4

What is the smallest unit of an element?

• a compound

• a molecule

• an atom

• a cell

Tags

NGSS.MS-PS1-1

Which statement explains why all elements are different from each other?

• They were discovered by different scientists.

• They are made of different atoms.

• They were discovered in different centuries.

• They have different colors when observed.

Through what process do atoms come together and form molecules?

• vibrating

• gluing

• chemical bonding

• mixing

Tags

NGSS.MS-PS1-5