Unit 1 Lesson 3 Flashcards
1
Q
Physical Change
A
A change that affects one or more physical properties of a substance.
The chemical identity of the substance remains the same
2
Q
Examples of physical changes
A
Dissolving salt in water
Cutting your hair
Melting ice cubes
Crushing a can
3
Q
Chemical Change
A
The processes when one or more substances change into entirely new substances with different properties
4
Q
Examples of chemical changes
A
Burning
Baking a cake
5
Q
Ways to tell a chemical change has happened
A
Production of a gas
Production of an odor
Formation of a precipitate
Change in color
Change in energy
6
Q
Law of Conservation of Mass
A
In physical or chemical changes, mass is not created or destroyed. It is only transformed into different substances
