There are 1000 ml in a litre. This is because milli in the SI system means a thousandth (1/1000) or 0.001 (of a litre). To convert from litres to ml, multiply by 1000. To convert from millilitres to litres, divide by 1000. Other prefixes are listed below.
Water is a chemical compound consisting of two hydrogen atoms and one oxygen. The name water typically refers to the liquid state of the compound. The solid phase is known as ice and gas phase is called steam.
Test the water means find out what something is like. Sometimes children while still at school have the chance to do so called work experience where they spend a week or two working under supervision in a particular job so that they have some idea what the job would be like if they did it after they had left school.