Unit 2 Interactions of Matter

Which of these changes would cause the molecules in a substances to spread farther apart?

• Putting the substance in a smaller container
• Adding thermal (heat) energy
• Changing the phase from liquid to solid
• Decreasing the overall kinetic energy of a liquid

Tags

NGSS.MS-PS1-4

A student drew the atoms in a solid.  Her picture shows the closely packed atoms vibrating in place.  How would she have to change this picture to show the same substance as a liquid?

• She should show the atoms moving more and make a little more space between them.
• She should draw the atoms bigger.
• She should draw the atoms REALLY far apart.
• She should draw the atoms in a different shape.

Tags

NGSS.MS-PS1-4

What happens when you add thermal energy to a substance?

• Spacing between particles decreases
• Vibration of particles increases
• Temperature decreases
• Pressure increases

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which of these describes how temperature and kinetic energy are related?

• When kinetic energy decreases, temperature doesn't change.
• When kinetic energy increases, temperature decreases.
• When kinetic energy decreases, temperature increases.
• When kinetic energy increases, temperature increases.

Tags

NGSS.MS-PS1-4

When a solid changes to a liquid, what happens?

• It melts.
• The particles move faster and spread apart.
• The kinetic energy of particles increases.
• All of these!

Tags

NGSS.MS-PS1-4

In a solid, how are the molecules packed?

• They are very close together.
• They are spread far apart.
• Molecules?  What molecules?
• They are kinda close together.

Tags

NGSS.5-PS1-1

NGSS.5-PS1-3

In a solid, how do the molecules move?

• They don't.
• They vibrate and slide past each other.
• They vibrate, but don't move from place to place.
• They vibrate and move freely.

In a liquid, how do the molecules move?

• They don't.
• They vibrate and slide past each other.
• They vibrate, but don't move from place to place.
• They vibrate and move freely.

Tags

NGSS.MS-PS1-4

In a gas, how do the molecules move?

• They don't.
• They vibrate and slide past each other.
• They vibrate, but don't move from place to place.
• They vibrate and move freely.

Tags

NGSS.MS-PS1-4

What is happening between R and S on this graph (the straight, horizontal line)?

• The substance is changing phase.
• The substance is freezing.
• The substance is heating up.
• Nothing

Tags

NGSS.MS-PS1-4