Phase Changes
When a solid changes to a liquid due to an increase in temperature, the phase change is _____________________________.
melting
What happens when the food dye is placed in the hot water vs. the cold water?
The food dye spreads out faster in the hot water than the cold water.
When a substance is heated, the particles move ________________(speed).
faster
When a liquid changes to a solid due to a decrease in temperature, the phase change is _____________________________.
freezing
Why does the glass look smaller when it is picked up?
The glass looks smaller in size because the glass cooled, and the particles slowed down and got closer together.
When a substance is cooled, the particles move ___________________.
slower
When a liquid turns into a gas due to an increase in temperature, the phase change is _____________________________.
vaporization
Why are truck tires more likely to explode on hot days?
Truck tires are more likely to explode on a hot day because the increase temperature causes the particles to move faster and spread out putting more pressure on the walls of the truck tire.
When a substance is heated, the particles move faster and ________________ (arrangement).
spread out
When a gas turns into a liquid due to a decrease in temperature, the phase change is _____________________________.
condensation
What causes a puddle to disappear?
Energy from the sun cause the particle in the puddle to move faster and spread out. The particles are able to escape into the atmosphere. The process of a liquid turning into a gas is called evaporation.
When a substance is cooled, the particles slow down and get ______________________.
closer together
When a gas turns into a solid due to a decrease in temperature, the phase change is _____________________________.
deposition
Dry ice goes directly from a solid to a gas. This phase change is called ___________________?
sublimation
What is an example of a phase change? What change of state occurred?
Example: Ice cream melting when it it taken out of the freezer. The solid ice cream melts and turns into a liquid.