Phase Changes and Energy Transfer

The video from MooMooMath and Science explains the differences between sublimation and deposition, both of which are phase changes. Sublimation is the process where a substance transitions directly from a solid to a gas, bypassing the liquid state, and is an endothermic reaction requiring constant energy input. Dry ice is a common example. Deposition, on the other hand, is when a gas turns directly into a solid, as seen with frost on windshields, and is an exothermic reaction. The video concludes with a reminder about the importance of kindness.

What is the process called when a substance transitions directly from a solid to a gas?

• Condensation

• Evaporation

• Sublimation

• Deposition

Which of the following best describes an endothermic reaction?

• Does not involve energy change

• Occurs only in liquids

• Releases more energy than it absorbs

• Absorbs more energy than it releases

What is dry ice an example of?

• Deposition

• Freezing

• Condensation

• Sublimation

What happens to dry ice when it is exposed to room temperature?

• It melts into a liquid

• It remains solid

• It turns into a gas

• It becomes a liquid and then a gas

What is the term for the phase change from gas directly to solid?

• Sublimation

• Melting

• Condensation

• Deposition

Which of the following is an example of deposition?

• Water boiling

• Steam condensing

• Frost forming on a windshield

• Ice melting