Sodium Hydroxie dissolves in water
Physical
Hydrochloric acid reacts with potassium hydroxide to produce a salt, water, and heat
Chemical
A pellet of sodium is sliced in two
Physical
Water is heated and changed to steam
Physical
Potassium Chlorate decomposes to Potassium Chloride and Oxygen gas
Chemical
Iron rusts
Chemical
When placed in H2O, a sodium pellet catches on fire as hydrogen gas is liberated and Sodium Hydroxide forms
Chemical
Evaporation
Physical
Ice melting
Physical
Milk sours
Chemical
Sugar dissolves in water
Physical
Wood rotting
Chemical
Pancakes cooking on a griddle
Chemical
Grass growing in a lawn
Chemical
A tire is inflated with air
Physical
Food is digested in the stomach
Chemical
Water is absorbed by a paper towel
Physical
When copper metal is heated in concentrated nitric acid, the copper dissolves to form a deep blue solution, and a brown gas is evolved from the acid.
Chemical
An iron scorches a shirt when you leave it on one spot too long
Chemical
The tires on your car seem to be getting low in very cold weather
Physical
Your grandmother's silver tea set gets black with tarnish over time
Chemical
Spray-on oven cleaner converts grease in the oven into a soapy material
Chemical
An ordinary flashlight battery begins to leak with age and can't be recharged
Chemical
Acids produced by bacteria in plaque cause teeth to decay
Chemical
Sugar chars if overheated while making homemade candy
Chemical
Hydrogen peroxide fizzes when applied to a wound
Chemical
Dry ice "evaporates" without melting as time passes
Physical
Iron metal is melted
Physical
Wood burns in air
Chemical
A rock is broken into small pieces
Physical
Wax is melted over a flame and then catches fire and burns
Chemical