Camping is a very popular form of living outdoors. It gives people the opportunity of spending their free time in nature or in the wilderness.
Tropical rainforests are woodlands around the equator with a lot of vegetation that is evergreen. It is very warm and rain falls throughout the year.
The word tsunami comes from the Japanese : tsu means harbour and nami waves. A tsunami is a series of ocean waves that can travel over hundreds of kilometres at a very high speed.
Some animals and plants in our world are very common, like houseflies, cats or daisies. They are not in danger of dying out. Other species are very rare. Sometimes only a few of them are left. Such species may disappear forever.
Ozone is a kind of oxygen in which each molecule has three atoms instead of two. The formula is O3 .
Weather is the state of the atmosphere in a certain place at a certain time.
Climate refers to the weather conditions in a certain area over a longer period of time.
Antarctica is the continent around the earth’s South Pole. It is covered with thick sheets of ice the whole year round.
Whales have been hunted for their meat and oil for centuries. In the 18th and 19th century, whaling became an industry. As time went on, whaling fleets caught more whales than the animals could reproduce.