Physical and Chemical Changes

Physical and Chemical Changes

Feb. 1st-5th

Multiple Choice

Warm up. Look at the image, and calculate which formula contains the most atoms of Oxygen

• 1

• 2

• 3

• 4

Physical and Chemical Changes Notes

1. Get out your Journal

2. Turn to a clean page

3. Format the page like you see to the right

Physical Changes (Term)

• Are easily reversible, have no new products, and are often just a change of state of matter (Definition)

• Examples include:

• Solid to liquid

• Liquid to gas

• Gas to liquid

• Liquid to solid

Chemical Changes (Term)

• Are not easily reversed, new products are formed, reactants are used up, have evidence of heat/light/sound/fizzling occur, can produce electricity, or have a precipitate form (Definition)

• Example: Wood Burning

Multiple Choice

Is ice melting a physical or chemical change?

• Chemical

• Physical

Multiple Choice

Is frying an egg a chemical or physical change

• Chemical

• Physical

Reactants (Term)

• The substances in a chemical reaction that chemically combine

• Examples would be the combination of sodium and chlorine

Products (Term)

• The new substance made after a chemical reaction

• Examples include Salt (NaCl) after sodium and chlorine combine

Precipitates (Term)

• A solid that forms after two liquids chemically react (definition)

• Examples would include the combination of milk and vinegar

Multiple Choice

When two hydrogens chemically combine with one oxygen would what would water be?

• Reactant

• Product

• Precipitate

Evidence of a chemical change

• Abbreviation to remember = City, Girls, Like, To, Order, Pizza

• C: color change

• G: Gas

• L: Light is produced

• T: Temperature change

• O: odor is produced

• P: Precipitate is formed

Multiple Choice

What does the o stand for in the acronym that we learned?

• Gas

• Light

• Odor

• Osmosis