Tema 2.4 Sciences

What´s a mineral? / ¿Qué es un mineral?. Minerals are substances that exist naturally on the Earth. Rock and sand are more of minerals. Diamond is the hardest mineral. Talc is the softest mineral. Some minerals are metals. Gold and silver are minerals. Quartz is a common mineral. People use quartz to make jewellery, glass and clocks.

Vocabulary: Diamond. Hardest. Talc. Softest. Gold. Silver. Quartz. Jewellery. Glass. Clocks.

Why are minerals important? / ¿Por qué son importantes los minerales?. People use minerals to make tools, jewellery, coins and many other things. Some minerals are important for human health. For example, milk contains calcium. Calcium makes bones and teeth healthy.