More than 70 per cent of the Earth's surface is covered by water, forming a huge global sea. If you tasted the sea water, you would find that it was very salty, unlike the fresh water in rivers and lakes. This title lets you explore the murky and mysterious ocean depths, the sweeping tides and currents, icy Polar waters and bright coral reefs.

Explore the murky and mysterious ocean depths, the sweeping tides and currents, icy polar waters and warm, bright coral reefs with this fascinating fact file and learn-it-yourself book. 20 amazing projects and experiments investigate the secrets of the sea - make waves in a tank, construct a rock-pool viewer, and build a sea-bird hide. Ideal for home or school use for 8 to 12 year-olds.