| A | B |
|---|
| oxygen + glucose | carbon dioxide + water |
| glucose + little oxygen (animals) | lactic acid + little energy |
| glucose + little oxygen (yeast) | carbon dioxide + ethanol |
| aluminium oxide | aluminium + oxygen |
| sodium + chlorine | sodium chloride |
| iron + sulphur | iron sulphide |
| iron + copper sulphate | iron sulphate + copper |
| calcium carbonate + hydrochloric acid | calcium chloride + carbon dioxide + water |
| hydrochloric acid + zinc | zinc chloride + hydrogen |
| acid + metal carbonate | salt + water + carbon dioxide |
| sulphuric acid + copper oxide | copper sulphate + water |
| hydrochloric acid + sodium hydroxide | sodium chloride + water |
| acid + metal oxide | salt + water |
| calcium + water | calcium hydroxide + hydrogen |
| metal + water | metal hydroxide + hydrogen |
| Mg + H20 | MgO + H2 |
| acid + metal | salt + hydrogen |
| lead oxide + iron | iron oxide + lead |
| aluminium + iron oxide | aluminium oxide + iron |
| methane + oxygen | carbon dioxide + water |
| methane + little oxygen | carbon monoxide + carbon + water |
| zinc + copper sulphate | copper + zinc sulphate |
| distance | speed x time |
| time | distance / speed |
| pressure | force / area |
| force | pressure x area |
| moment | force x distance |
| density | mass / volume |
