America Images News

America Images wallpapers


How it works

compounds, acids and bases, mixtures, and solutions

Every material is made of either a pure substance or a combination of substances. A substance is pure if it contains only one type of element. An element is a substance made up of all of the same type of atoms. Oxygen is a pure substance. It only contains oxygen atoms. Elements combine in several ways... read more

genetics

Humans, like all living things, reproduce. When they do, they pass along a ‘code’ to their offspring. The code is like a set of instructions or directions. It tells the cells of the offspring how to develop and grow. Genetics is the ... read more

how to make the ultimate sword

Discover the ancient art of forging a deadly weapon ... read more

how much stronger is carbon fibre than steel

Carbon fibre can be stronger than steel but is far lighter. ... 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