A kangaroo is an animal found only in Australia, although it has a smaller relative, called a wallaby, which lives on the Australian island of Tasmania and also in New Guinea.
The largest kangaroos are the Great Grey Kangaroo and the Red Kangaroo. Adult grow to a length of 1.60 metres and weigh over 90 kilos.
Lightning is a sudden, violent flash of electricity between a cloud and the ground, or from cloud to cloud. A lightning fl ash, or bolt, can be several miles long. It is so hot, with an average temperature of 34,000° Centigrade, that the air around it suddenly expands with a loud blast. This is the thunder we hear.
Lightning occurs in hot, wet storms. Moist air is driven up to a great height. It forms a type of cloud called cumulonimbus. When the cloud rises high enough, the moisture freezes and ice crystals and snowfl akes are formed. These begin to fall, turning to rain on the way down. This rain meets more moist air rising, and it is the friction between them which produces static electricity. When a cloud is fully charged with this electricity, it discharges it as a lightning flash.