Steel is a mixture made up of iron plus hardeners such as carbon along with a small amount of other elements.



Which word accurately describes steel?

These elements act as semiconductors, can react with either acids or bases and include silicon and boron. What are they?

Which statement about non-metals is true?

Which symbol could be an element symbol?

This element is quite common on Earth. It is often found in ores and it will react with oxygen to create rust. In this photograph, rust gives the water a reddish orange colour. Which element is this?

These are photographs of two different forms of a single element.





This element is the second most abundant (by mass) in our bodies after oxygen. Which element is it?

Water is fairly common on planets in our solar system. On Earth, water is split by photosynthesis into two elements, one of which in its abundance makes this planet very special. This element is present on Mars and Venus as well but only on Earth is it available in a quantity and form that makes life possible. What is this element?

This is a lustrous silvery white metallic element with a slight golden tinge. It is known in German as devil's copper because its ore looks a lot like copper ore. It resists corrosion so it is useful in the making of coins. What is it?

Many elements have been known and used for centuries. That is why they have odd symbols such as Pb for lead and Au for gold. These symbols come from their old names, plumbum and aurum, respectively. This old international language of science and scholarship was used from the Roman times up to the 17th century. What is this language?

Ozone (O₃) is an air pollutant that can harm our respiratory system. But it also exists in our upper atmosphere where it filters out potentially deadly ultraviolet light. It has an odd odour that you can smell after a lightning storm. At -112 °C it is a dark blue liquid and at -193 °C it is a violet solid. What is ozone?