Energy and Phase Change

When a substance melts, the kinetic energy _____________.

• decreases
• stays the same
• increases
• decreases then increases

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

When molecules flow around each other, they are in this phase

• solid
• liquid
• gas
• plasma

Tags

NGSS.MS-PS1-4

What takes place when a liquid changes to a gas?

• condensation
• melting
• evaporation
• freezing

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

5. What is it called when a solid turns directly into a gas?

• Sublimation
• Condensation
• Liquid

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

You have dropped your popsicle and are watching it become a LIQUID. Which answer BEST explains what PHASE CHANGE has occurred AND how the molecule MOVEMENT has changed?

• The PHASE CHANGE that has occurred is CONDENSATION and the molecule MOVEMENT has become FASTER.

• The PHASE CHANGE that has occurred is EVAPORATION and the molecule MOVEMENT has become SLOWER.

• The PHASE CHANGE that has occurred is MELTNG and the molecule MOVEMENT has become FASTER.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

You have decided to start sealing all your letters with glittery wax because you are so "cool". Which answer BEST explains what you must do to make the SOLID wax a LIQUID?

• In order to make the SOLID wax a LIQUID you must ADD HEAT ENERGY by putting the wax in the FREEZER.

• In order to make the SOLID wax a LIQUID you must ADD HEAT ENERGY by putting the wax over a FLAME.

• In order to make the SOLID wax a LIQUID you must REMOVE HEAT ENERGY by putting the wax in an OVEN.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

You decide to blow bubbles (soapy WATER) outside on a snowy day. Which answer BEST explains what has happened to the molecule ARRANGEMENT of the WATER?

• The WATER molecule ARRANGEMENT has become CLOSER.

• The WATER molecule ARRANGEMENT has become FARTHER APART, forming rings.

• The WATER molecule ARRANGEMENT has become CLOSER, forming squares.

Tags

NGSS.MS-PS1-4

You watch your science teacher put a balloon in a bowl of liquid nitrogen and see the balloon has shrunk like a raisin. Which answer BEST explains how you know if HEAT ENERGY been ADDED or REMOVED.

• HEAT ENERGY has been ADDED. I know this because the balloon has become LARGER meaning the molecule ARRANGEMENT is FARTHER APART.

• HEAT ENERGY has been REMOVED. I know this because the balloon has become SMALLER meaning the molecule ARRANGEMENT is CLOSER.

• HEAT ENERGY has actually stayed the SAME. I know this because the balloon has NOT CHANGED meaning the molecule ARRANGEMENT is also NOT CHANGED.

Tags

NGSS.MS-PS1-4

You are relaxing on some grass when you notice LIQUID water droplets have begun to seemingly disappear off the grass leaves. Which answer BEST explains what PHASE CHANGE has occurred AND how the molecule ARRANGEMENT has changed?

• The PHASE CHANGE that has occurred is EVAPORATION and the molecule ARRANGEMENT has become FARTHER APART.

• The PHASE CHANGE that has occurred is FREEZING and the molecule ARRANGEMENT has become CLOSER.

• The PHASE CHANGE that has occurred is MELTING and the molecule MOVEMENT has become FASTER.

Tags

NGSS.MS-PS1-4

Which two phases changes takes away energy?

• Freezing, Melting
• Condensation, Evaporation
• Freezing, Condensation
• Melting, Evaporation

Tags

NGSS.MS-PS1-4