Science

Vocabulary of Medical Significance - Medical dictionary and abbreviations. Use this medical dictionary to find the meaning of a medical term. This Glossary of medical terms can be used to look up the meaning of a medical term. Abscess – A painful... Read More

Units of Measurement Ampere – Unit of electric current. Angstrom – The unit of wavelength of light. Bar – It is the unit of atmospheric pressure; one bar is equal to pressure of 1.013x105 N/m2. Calorie – The unit of heat. Coulomb –... Read More

General Science Quiz Questions & Answers - Part 1 Why does a piece of iron get rusted if left exposed in the open?Iron piece rusts if left exposed in the open because it reacts with the oxygen in the air, forming iron oxide - a compound of iron... Read More

When do things move? Things only move when a force is applied to them. Forces are pushes or pulls in a particular direction. A flag blows when the wind pushes it. A door opens when you pull it. Animals move when their feet push against the ground,... Read More

How does your heart works? The heart is a hollow muscle in the middle of the chest that pumps blood around the body supplying cells with oxygen and nutrients. A muscular wall, called the septum, divides the heart lengthways into left and right sides... Read More

When did ammonites live? Ammonites lived about 400 million years ago. They were sea animals with a hard spiral shell, and they probably floated rather slowly through the sea. Some ammonites were as big as juggernaut wheels. At this time, the oceans... Read More

What makes things fall? Gravity is the force that makes things fall. It is caused by the enormous size of the Earth pulling everything on its surface, or in its atmosphere, towards it. When a stone is dropped in the air, gravity pulls the stone... Read More

Where does light come from? The Earth's biggest source of light is the Sun. heat and light energy created by the Sun travels through space in straight lines called rays at almost 300,000 kilometers per second. The Earth spins right around once a... Read More

How does your brain work? Your brain works by sending and receiving messages through the nerves in your body. The nerves act like the body's telephone system. Information from your senses passes along nerves, up the spinal cord (a long nerve... Read More

What are the colours in a rainbow? There are seven colours in a rainbow and they always come in the same order: red, orange, yellow, green, blue, indigo and violet. Light from the Sun may look white, but it is actually a combination of many colours.... Read More