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electricity and magnetism

Electricity and magnetism are everywhere. Electricity is a form of energy. Magnetism is also a form of energy. They make it possible for televisions, computers, and many other electronic devices to exist. Medicine uses them to help treat illnesses in humans and animals. ... read more

forces that shape the earth

Many forces can form, or shape, the Earth. Some of these forces come from deep within the ground. Volcanos and earthquakes cause major changes to the landscape. Other changes occur because of natural forces on the surface. Water and wind shape the planet every day. Human activity also plays a role in ... read more

if a nucleus were the size of a marble how big would the atom be

If an atom’s nucleus were the size of a marble, the atom would be over 120 metres across. ... read more

where did the sand in the sahara desert come from

The sand in the Sahara is a result of rock erosion and weathering. ... read more

plant movements and adaptations

Plant Movements ... read more