Physical and Chemical Changes Flashcards
Examples of Physical Properties:
Color Smell Taste Hardness State of Matter Boiling, Freezing, or Melting Point
Examples of Chemical Properties:
The ability to react with: air
rust, tarnish, corrode, and rot
The ability to react with: water/acids
The ability to catch fire: flammability
What is matter?
Matter is anything that takes up space and has mass.
What is a physical change?
A change that occurs without changing the identity of the substance. No new substances are formed.
Examples of Physical Changes:
Change in size, shape, or color Pencil shavings Torn Paper Crushed ice Sugar dissolved in water Painting a wall
What is a chemical change?
A change that occurs that causes the identity of a substance to change; something new is formed. New substances with new properties are formed.
Evidence of Chemical Change:
- New color appears
- Bubbles or fizzing
- Heat is produced
- Light is produced
- Sound is given off
- Difficult or impossible to reverse
Is water evaporating from the ocean a Physical or Chemical Change?
Physical
Is the yolk of an egg, which contains sulfur, causing tarnish to form on silver a Physical or Chemical Change?
Chemical
Is ice on a lake melting to become water in the lake a Physical or Chemical Change?
Physical
Is charcoal in a fire turning to ash after several hours a Physical or Chemical Change?
Chemical
Is a pencil that’s been sharpened in a pencil sharpener, leaving behind shavings a Physical or Chemical?
Physical
Is a battery making electricity to turn on a flashlight a Physical or Chemical Change?
Chemical
Is a bicycle rusting when left in the rain a Physical or Chemical Change?
Chemical
Is a shirt being accidentally torn in the washing machine a Physical or Chemical Change?
Physical
