Physical Changes
What is a physical change?
A change in matters size, shape, or state.
What is a chemical change?
A matter transforms from one state to another, or matter being transformed into energy.
What point does a solid change to a liquid?
Melting Point
All matter is made up of _____.
Molecules
Who created soda?
Joseph Priestly
True or False:
Paper folding is an example of a physical change.
What chemical change happens in your body?
Food transforms into energy to help you grow.
What point does liquid change to a solid?
Freezing point
Molecules are always ______.
Moving
Other than soda, what else did Joseph Priestly discover?
Oxygen
True or False:
Matter does NOT need energy to go through a physical change.
False. All changes need energy.
What do plants need to transform into energy for growth?
Sunlight, carbon dioxide, water
What point does liquid change to a gas?
Boiling point
Describe the molecules in a solid.
Molecules in a solid are tightly packed together and only move a little.
What fabric did Wallace Carothers create?
Nylon
At what point does a solid change to a liquid?
The melting point
True or False:
A ball loosing its air is a chemical change.
False, it is a physical change.
What point does gas change to a liquid?
Condensation point
Describe the molecules in a liquid.
Molecules in a liquid have some space between them and can move more easily.
Nylon is a fabric that is ______ and _______.
Strong and Stretchy
At what point does a gas change to a liquid?
The condensation point
Give an example of a chemical change.
Food changing to energy.
Give an example of a liquid changing to a gas.
Water boiling turning into steam (water vapor)
Describe the molecules in a gas.
Molecules in a gas are far apart and move freely.
What does effervescent mean?
Bubbling and fizzing