This topic takes on average 55 minutes to read.
The chemical formula for water is H2O – two hydrogen atoms covalently bonded to one oxygen atom. The shape of the molecule and the distribution of electrons in this molecule means it is polar, with the oxygen slightly negative and the hydrogen atoms slightly positive. As a result water molecules are held together by hydrogen bonds. It is the effect of these bonds which makes water liquid at room temperature and the perfect medium for life. After all, it makes up 60-70% of your body!
Water is a polar molecule.
Hydrogen bonding between the water molecules affects the melting and boiling point of this amazing liquid.
The effect of density changes in water as it cools on ecosystems in bodies of fresh water.
Air and sea temperatures over a 24 hour period in the tropical West Pacific. Notice the difference in temperature variation between the water and the air.
Water covers up to 70% of the surface of the earth and is home to an enormous range of organisms.
Sweating is a vital cooling mechanism in mammals.