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.
World population is the number of humans living on Earth. This unit describes how the world’s population has grown over the centuries, where people live , the problems that countries have and the dangers of overpopulation.
The Great Lakes consist of five lakes in North America, on the border between the United States and Canada. Lake Erie, Lake Ontario, Lake Huron, Lake Michigan and Lake Superior make up the greatest area of freshwater in the world.
An earthquake is one of the worst natural disasters on our earth. We think that the ground we stand on is very stable, but it isn’t. It moves quite a lot.
New York is the biggest city in the United States with a population of over 8 million . It lies along the Hudson River in the southeast corner of the state that has the same name.
Australia is the sixth-biggest country in the world and the smallest continent. It lies between the Pacific and Indian Ocean, about 3,000 km from the mainland of Asia.
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.
An airport is a place where airplanes take off and land. Passengers get on and off planes, cargo and other goods are loaded and unloaded at airports.