Grade 4

In this science experiment we will study the effect that detergent pollution has on fresh water birds' ability to float. This is also called the 'buoyancy' of a bird.

Acid rain can damage many different forms of life. Acid rain turns the pH-level of the oceans more acidic and this dissolves or weakens the shells of living sea creatures. Other animals higher up in the food chain that...

Human beings can vary quite significantly from each other. Our size, shape, eye colour, hair colour and even our sense of balance is different from one another. In the following science experiment, study the sense of balance of some...

Ever notice how you breathe faster and you heart beats faster when you run around or do any exercise? This happens automatically as your body requires more oxygen to make the energy you require to do these exercises.

Humans need to bundle up in coats, hats, mittens and heavy socks to stay warm during the winter months. The winter survival strategies of insects are, on the other hand, quite remarkable as can be seen in the following...

Spoiled or damaged fruit gives off a gas that causes other fruits near it to ripen faster. This is also where the expression one bad apple ruins the whole barrel comes from. Test if this phenomenon is true with...

Many 'hybrid' fruits such as 'nectarines' which is a combination of a peach and plum fruit, did not exist about 100 years ago. Botanists are people that study the science of plants. These scientists can 'graft' together many types...

Dissolve the plant tissue of leaves with baking soda to observe and study their vein structure with the following science experiment.

'Vitamin E' is a popular ingredient in anti-aging creams, because it slows down the chemical process called 'oxidation reduction reactions' in the cell membranes of human skin or other organic matter. We can test this with rose petals in...

Motion pictures work by rapidly projecting a series of still drawings or photographs recorded on film in sequence onto a movie screen. 'Vision' is the ability of our brains and eyes working together to make the images on the...