Physical and Chemical Changes Physical Changes Physical Change
- Slides: 8
Physical and Chemical Changes
Physical Changes • Physical Change: a change in matter in which no new substance is formed • New properties are temporary and can be reversed
Physical Changes Common Physical Changes 1) Bends or stretches (Ductility) 2) Breaks or cuts 3) Color 4) Phase Change (from solid-> liquid, or liquid-> gas) 4) Hammered into sheet (malleable) 5) Dissolves in water 6) Flows Slowly (Viscosity)
Chemical Changes • Chemical change: a change in matter in which at least one new substance WITH NEW PROPERTIES is formed • Difficult or impossible to reverse
Chemical Changes 7 Signs a Chemical Change has occurred: 1) Heat or light is produced or absorbed 2) The starting material is used up 3) A new color appears or starting color disappears 4) A material with new properties forms 5) Gas bubbles form in a liquid 6) Grains of solid precipitate form in a liquid 7) The change is difficult to reverse
Foldable • Label each foldable flap Physical Properties Chemical Properties Physical Changes Chemical Changes
Foldable 1. Write a definition for physical and chemical changes 2. Describe or draw 3 examples of physical changes 3. Describe or draw 3 examples of chemical changes • *Use Reading on page 157, 158 in book to help* Write definition Describe 3 examples Chemical Properties Physical Chemical Changes
Physical change and chemical change
Whats the difference between physical and chemical changes
Which is an example of a physical change
Whats the difference between physical and chemical changes
Is cutting paper a physical change
Spare change physical versus chemical change
How does a physical change differ from a chemical change? *
Baking chemical change
Is chopping wood a physical change or a chemical change
