Chemical vs Physical
Dissolving sugar in coffee is what type of change?
Physical
Label the state: ice cube.
Solid
Endothermic reactions do what with heat?
Absord or take in the heat
Melting is a change from ___ to ___.
Solid to Liquid
The temperature when a solid turns into a liquid.
Melting Point
Burning sticks in a bonfire is what type of change?
Chemical
Label the state: water vapor
Gas
Exothermic reactions do what with heat?
Release heat
Freezing is a change from ___ to ___.
Liquid to Solid
The temperature when a liquid turns into a gas.
Boiling Point
List two signs of a chemical change.
Change in Color, Change in Temp, Produces a gas, Creates a precipitate etc.
Label the state: orange juice
Liquid
During an endothermic reaction, does the temperature increase or decrease over time?
Decrease
Vaporization is a change from ___ to ___.
Liquid to Gas
When an object melts, do particles speed up or slow down?
Speed up
List two signs of a physical change.
Change or state or change in appearance
When a substance melts, what phase does it start and end as?
Solid to Liquid
During an exothermic reaction, does the temperature increase or decrease over time?
Increase
Condensation is a change from ___ to ___.
Gas to Liquid
When an object freezes, do particles gain or lose energy?
Lose Energy
Define chemical reaction.
when a substance is converted into one or more new substances
When a substance sublimates, what phase change occurs?
Explain the energy change when water vapor condenses into liquid.
Particles lose energy and start to slow down.
Name the two types of vaporization.
Evaporation and Boiling
When sublimation occurs, do particles gain or lose energy?
Gain Energy