Show:
Phase Changes
Kinetic Energy
Pure Substances versus Mixtures
Chemical and Physical Changes
Miscellaneous
100
This phase change is from a solid to a liquid
What is melting.
100
This state of matter has an average kinetic energy and the particles slide past one another.
What is a liquid.
100
Gold, silver, helium, hydrogen, are all examples of
What is pure substance
100
Chalk on a chalk board, wax melting, making hot cocoa are examples of
What is physical changes.
100
The smallest part of a element
What is an atom
200
This phase change is from a liquid to a solid
What is freezing
200
This state of matter has the lowest energy level and the particles vibrate.
What is a solid
200
Air contains oxygen, nitrogen, carbon dioxide and other trace gases. Air is a
What is a mixture?
200
Bubbling and fizzing are
What is a chemical change.
200
The smallest part of a compound
What is molecule
300
This phase change is from a gas to a liquid
What is condensation?
300
This state of matter has the highest kinetic energy moves in all directions and the particles bounce off the sides of the container.
What is a gas.
300
Salt water, milk, sugar water are examples of
What is a mixture?
300
Color change is an example of
What is physical and chemical change.
300
When iron is cooled the particles
What is move slower but do not stop.
400
This phase change is from a liquid to a gas.
What is evaporation?
400
Why does hot and cold water have different densities?
What is the particles move faster and further apart in warm water, and slow and closer together in cold water. (Speed of particles)
400
Sodium chloride (salt), helium and hydrogen reacting with oxygen to form water are examples of
What is a pure substance.
400
Phase change is an example of
What is physical change.
400
Water boiled because energy is transferred. Which is correct? The hot stove absorbs cold from the water or the cold water absorbs heat from the pan?
What is the cold water absorbs heat from the pan.
500
In order to get a phase change to occur, what has to be added or taken away?
What is kinetic energy.
500
Why does a thermometer rise?
What is the energy of the particles increases and the particles move further apart and the alcohol rises.
500
When 2 substances combined physically they are a
What mixture.
500
A new substance is formed
What is chemical change.
500
The process in which energy is released is
What is exothermic.