Physical vs Chemical changes

A chemical change A) occurs when powdered lemonade is stirred into water B) occurs when methane gas is burned C) occurs when water is vaporized D) occurs when salt is dissolved in water E) occurs when paper is shredded

B) occurs when methan gas is burned

A physical change A) occurs when glucose is converted into energy within your cells B) occurs when water is evaporated C) occurs when propane is burned for heat D) occurs when iron rusts E) occurs when sugar is heated into caramel

B) occurs when water is evaporatedy

Chemical Change Examples

Burning wood, mixing vinegar and baking soda, iron rusting, cooking an egg, rotting banana

5 signs of a chemical change

Change in color, formation of a precipitate, formation of a gas, odor change, temperature change

Physical Change Examples

Chopping wood, boiling water, shredding paper, dissolving sugar in water, ice cube melting

Stages of Matter

Solid, liquid, and gas

a chemical change occurs when: a) an egg is cooked b) sugar is dissolved in water c) water is boiled d) a window is broken

a) an egg is cooked

Chemical Change

creates a new substance, not reversible, energy is released or absorbed, chemical change takes place

a physical change occurs when a.. a. peach spoils b. silver bowl tarnishes c. bracelet urns you wrist green d. glue gun melts a glue stick

d. glue gun melts your stick

Physical Change

does not create a new substance, easily reversible, change in size or shape, change in state of matter, expected color change