Which picture best depicts a liquid?

Which picture best depicts a gas?

Which picture shows particles with the LEAST kinetic energy?

Which picture shows particles with the LOWEST attraction between particles?

As the energy of particles increases the attraction between always _________.

Exothermic or Endothermic? Air* inside a hot air balloon heats up and expands.

*denotes system

Exothermic or Endothermic? Steam* cools off and condenses into water vapor.

*denotes the system

Exothermic or Endothermic? Cake batter* cooks inside an oven.

*denotes the system

Exothermic or Endothermic? An Ice Pack* creates a cooling sensation.

*denotes the system

Exothermic or Endothermic? Carbon dioxide* gas cools and is deposited as dry ice.

*denotes the system

Exothermic or Endothermic? Gasoline* ignites inside the piston of an engine.

*denotes the system

Exothermic or Endothermic? A plant cell* absorbs energy from the sun to make sugar.

*denotes the system

Exothermic or Endothermic? Propane* burns after being lit by a match.

*denotes the system

Which part of the distillation process is exothermic?