The colour of food is important – if an apple or a strawberry is red, it’s likely to be ripe, sweet and good to eat, and if a piece of…
People seem to remember many things by their colour – a red bus, their blue car, a friend’s house with a yellow door. An image in colour seems more vivid…
Before watches and clocks were invented, people used the position of the sun in the sky to guess the time of day, but this couldn’t be very accurate. The next…
Many students listen to music while they are studying, and say that it helps them learn. Many parents and teachers say that music is just distracting, and that students are…
Sand is a mixture of small grains of rock, ranging in size from 0.0625 mm to 2 mm. Sand is made by erosion and weathering of rocks – seas or…
Clouds are collections of very small drops of water or particles of ice and they form from water vapour in the air. Types of Clouds According to the World Meteorological…
Tessellation is the covering of a surface with repeating patterns of regular or irregular shapes that fit together exactly (interlock), with no gaps or overlaps. The earliest tessellations discovered date…
Weather stations include different ways of measuring the weather. Meteorologists (people who study the weather) use weather stations to monitor the weather day by day, and use the results to…
Cheese is made from milk. This is most often cows’ milk, but it can be made from milk from sheep, buffaloes and goats – even yaks. It can be soft…