Generation Genius Thermal Energy

What causes atoms or molecules in a substance to vibrate?

• Chemical reactions only

• Adding or removing thermal energy

• The substance being in a solid state

• External physical force

Tags

NGSS.MS-PS1-4

What does temperature measure in a substance?

• The total amount of thermal energy

• The average kinetic energy of the particles

• The speed of the slowest particle

• The vibration frequency of molecules

Tags

NGSS.MS-PS1-4

How do the particles in hotter substances move compared to those in colder substances?

• They move at the same speed

• They move slower

• They move faster

• They do not move at all

Tags

NGSS.MS-PS1-4

At what temperature does water vapor, which is also called steam, exist?

• Between 0°C and 100°C.

• At 0°C or lower.

• 100°C or higher.

• At room temperature.

Tags

NGSS.MS-PS1-4

What is the term used to describe the movement of thermal energy?

• Condensation.

• Evaporation.

• Heat.

• Temperature.

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Why might we want to reduce the amount of thermal energy that is transferred into or out of a substance?

• To heat something up or cool something down

• To keep hot things hot or cold things cold

• To increase the efficiency of energy transfer

• To make the substance react chemically

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

What is an insulator?

• A device that heats up substances

• A material that transfers thermal energy very well

• A material that does not transfer thermal energy very well

• A type of thermometer

Tags

NGSS.MS-PS3-3

What is the role of air space in the context of insulation with materials like cardboard or foam?

• It allows air molecules to move freely and transfer energy

• It contains air molecules that are close together, which transfer energy well

• It has lots of air space, which means air molecules are not close together and do not transfer thermal energy well

• It acts as a vacuum to completely stop thermal energy transfer

Tags

NGSS.MS-PS3-3

How does popcorn pop?

• The chocolate chips melt.

• The kernels shrink.

• The microwaves increase the thermal energy of the water molecules inside the kernels.

• The freezer lowers the thermal energy of the kernels.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is the role of the freezer when making ice pops?

• It adds thermal energy to the liquid.

• It increases the pressure on the liquid.

• It increases the thermal energy of the liquid.

• It lowers the thermal energy of the liquid.

Tags

NGSS.MS-PS1-4