Even when I was five years old, I was obsessed with space.

Metals are strong and are useful for making tools, buildings, bridges and other structures where strength is important.

Alkali metals such as sodium, potassium, rubidium, caesium and francium are extremely reactive elements, just putting them in water can result in an explosion! They are carefully stored in oil to prevent this happening.

Aluminum is a good conductor of heat and is often used to make cooking pots.

While aluminum is the most common metal found in the Earth's crust, the most common metal found on Earth is iron, mostly because it makes up such a large part of the Earth's core.