DNA (deoxyribonucleic acid) is the molecule that carries the genetic information (the instructions) for the cell, and DNA is found in all cells that have a nucleus. DNA is made…
Think about the best food ever – perhaps a really good piece of chocolate cake – and remember what it tastes like and what it smells like. And then imagine…
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…
Unless it is something that has a soft and wobbly structure, like a jellyfish, all animals, including humans, have a stiff skeleton to support their muscles and other body tissues,…
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…
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…
