Cesium is reacting with water
Apple slices will turn brown when exposed to air
Propane gas is burning on the stove
Fluorine has a melting point of -220°C
Hydrogen can react readily with oxygen
A puzzle is cut into 1000 pieces
Coloring a book
Milk is going sour
Food is being digested
Butane gas will ignite with oxygen
An egg is cooking
A patient has a temperature of 40.2°C
Chromium is a steel-gray solid
Gold is heated until melting point
Ammonia will corrode iron
Mercury is a liquid
Cheese is grated
Fluorine can explode if exposed to hydrogen
Water vapor is condensing to form rain
Neon is a colorless gas