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The swans are some of the largest flying birds. They are large in size and have large feet and long necks. The males are usually bigger and heavier than females. The Mute Swan, Trumpeter Swan, and Whooper Swan are the largest swans. They can be over 1.5m long. They can weigh over 15kg. Their wingspans can be almost 3m.

Most swans are white. These swan are found in the Northern Hemisphere. This means they are found in Europe, Asia and North America. However, the Black Swan is black with a red beak. It lives in Australia. The Black Necked Swan is white but it has a black neck. It lives in South America. Read more »

Modern zoos try not only to be for people’s entertainment, but for education, research, and the conservation and protection of animals. Many zoos are centers where rare animals are preserved when they are in danger of dying out. These modern zoos also want to give the animals a natural life, so that they are healthy and behave normal. This is done for the animals, but also that people can see the animals as if they were in nature, and not in a zoo. Read more »

A rainbow is an arc of colour in the sky that you can see when the sun shines through falling rain. The pattern of colors starts with red on the outside and changes through orange, yellow, green, blue, indigo to violet on the inside. Read more »

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A necklace is a jewellery item worn round the neck. It is of ancient origin: all civilisations have worn them. They usually figure precious metals and jewels, but may be made of colourful beads. Read more »

A cactus is a kind of plant. The plural of cactus can be cacti or cactuses or cactus. In science all genera of cacti (as the whole) are named Cactaceae. Read more »

A Shape is a geometric figure that can be mathematically defined. Shapes are defined in terms of the mathematical objects they are embedded in: Two-dimensional shapes are defined in terms of the plane, three-dimensional objects in terms of the Space. Read more »

Ice cream is a frozen dessert made from cream, with added flavors and sweeteners. This mixture is quickly frozen while it is stirred, so that large ice crystals do not form. Some ice cream is made with seaweed so that it is not sticky. Read more »