'Boomerang' is the hunting weapon of the Australian aborigine. It is a curved piece of hard wood, about 2ft. 6 inches long. It is flat on one side and rounded on the other. A slight twist in the angle of one of the 'wings' makes it return to the owner when thrown. But when it hits something on the way, it cannot return. Special nonreturning types are made for use in warfare.
Tuesday, January 29, 2008
Coral Reef___
An animal called 'polyp' builds itself a skeleton from the lime it collects from the sea. A polyp looks like a plant and lives in warm salt water. The skeleton it builds is a hard as rock. It protects the polyp during its life time. When the polyp dies, the skeleton remains. A Coral Reef is formed when so many polyps join together over the thousands of years and left the skeletons behind._____
Fire Works
Fire works have been used by man for thousands of years. They had their beginning in China and gradually spread through the East. It is believed that the crusaders brought fireworks to Europe in the thirteenth century. The colours in fireworks are produced by the metal salts used in the explosive. Copper makes blue; barium green, sodium green and strontium red.
Black Forest___
Black Forest is a mountain range in West Germany. It is situated where the border meets those of France and Switzerland. Germany has many fine forests. The mountain slopes are covered with dark-leaved fir trees, which gave the firest its name. Many German folk tales come from the region and many wooden toys, instruments and clocks are made there. The Black Forest region is a favourite holiday resort too.
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