What is static electricity? When we rub things made of amber or plastic it will pick up electrons from our clothes or hair. This gives them a positive charge. Then if we happen to touch something with a slightly negative charge a small spark often...
When was coffee brewed for the first time? Initially coffee was used without being brewed. The fruit of the tree was used by east African tribes as food. The berries were roasted or prepared with animal fat and eaten. Coffee was probably first grown in...
Who invented printing? The Chinese invented block printing around 2,000 years ago. Characters were carved on wooden blocks and covered in ink. Then they were stamped on to paper. Modern printing began in the 1440s. This was done with movable metal type. It was a...
Why is the butterfly born twice? The butterfly has two distinct stages in its life. It comes out of the egg as a caterpillar which feeds on leaves voraciously and becomes plump. The caterpillar then spins a covering around itself which is called a cocoon....
What is a lodestone? A lodestone can be described as a compass of early times. It was used mostly by sailors to help them with navigation while sailing on a ship. It consisted of a piece of magnetite which was a rock containing iron that...
What is inertia? All objects resist change and this is called inertia. Objects find it easier to continue doing what they are doing at a particular time unless strong force is applied to them. Then it may change its position, shape or movement.
Who was responsible for Persia’s greatness? King Darius I was the ruler who made Persia great. He was the ruler from 521 to 486 BC. He built an empire that included Egypt and the Indus valley. Taxes and tributes paid by those he conquered brought...
Which animals were the first to be based in land? Amphibians could live on land but they had to return to the water to breed. So they were not true land animals. The eggs hatched into small tadpoles which had to remain in the water...
How did music originate? Music began when man learned to sing and love songs and dirges or sad songs were the first songs to be sung. When dance developed, a different sort of music originated with man clapping his hands or stamping the earth. One...
What are the common features of living things? Living things have six common features. They can feed and the food is used to produce energy or build or renew body parts. Secondly, they can grow by becoming larger or taking on different forms during their...
