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How to work with Speed, Density and Pressure

Speed, density and pressure are compound measures – and you learn all about them in Maths lessons. Before you revise how to complete calculations on these, check out some of these fun facts!

Horned lizards are able to shoot blood out of their eyes – and it can travel up to 3 feet away! Sinuses filled with blood in their eye sockets enable this to happen. To confuse predators, they build up pressure in the sinuses until they burst. The blood then shoots out of them and straight into the predator’s mouth, confusing them for long enough to allow the lizard to escape!

Cuvier’s beaked whales hold the record for the longest and deepest dive of any mammal. They can dive up to nearly 3000 metres below the surface and hold their breath for up to 2 hours and 18 minutes. In order to dive so deep underwater, their bodies need to be able to withstand incredibly high pressure. Therefore, they collapse their lungs! However, they are especially vulnerable to loud noises caused by military sonar. This frightens them, causing them to panic and move to the surface of the water too quickly. As in humans, this results in the bends, or decompression sickness for the whales.

GCSE Maths students – you need to be able to work with compound measures, like pressure. Our new guide, “How to work with Speed, Density and Pressure” can help. It includes the formula for each, and explains how to use them. Included, as always are questions to try, and answers to check your understanding.

To see the guide, click on the picture below.



Come back and check our blog page for more resources to help you improve your understanding of different topics in various subjects.  New Maths and Science guides will be coming soon.

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