Environmental Science

An 'astrolabe' is a device used for measuring altitude, including the height of objects in the sky. The name has its origins from the Greek words 'astron' and 'lambanien' meaning 'the one who catches the heavenly bodies'. Creating your...

Scientists use special machines called 'seismographs' to record the 'seismic waves', or movements in the earth's crust. Each magnitude number on the 'Richter scale' represents the maximum amplitude of a seismic wave at a distance of about 160 kilometres....

Think of some ways to measure the height of your school building with relative accuracy and ask some of your friends to help. This science experiment is based on the general idea that tall objects cast longer shadows than...

A very old method of finding north without a compass is by using your wristwatch, the sun and a thin stick. Even though this method to find your direction is not very accurate, Boy Scouts swear by it! Find...

In the following science experiment you will learn how dirty water can be purified, by using only a container, plastic sheets and a few rocks.

There are many fascinating ways of determining the height of a ceiling without having to physically measure its height with a tall ladder and measuring tape! In this science experiment, use a helium balloon to measure the height of...

Water in its solid form or 'ice' can be a very interesting substance. Amaze your friends with the following 'magic trick' to lift up an ice cube. Ask your friends to pick up an ice cube floating in a...

Can you think of an easy way to get a relatively accurate estimate of your school-hall's ceiling height? There are many fascinating ways of determining the height of a ceiling without having to physically measure its height with a...

Infra-red rays from the sun can be used to cook food in a similar way to how a microwave oven cooks food. This is called cooking with 'solar energy' and we will study this in the following science...

In the old days telling time was not as easy as it is today. They used hourglasses, candle clocks and a device called a water clock. Do the following science experiment to learn how water can be used to...