English: We have continued to look at war poetry and also at diaries written during the First World War. We have also started reading the amazing “Private Peaceful” by Michael Morpurgo. Furthermore, we are still practising our lines for our Christmas performance of Charles Dickens’ “A Christmas Carol”. The photos show us enthusiastically painting the sets. We all excited but a little bit nervous at the same time.
Year 8 Maths
This week we are looking at Expressions and Formulae.
What do we mean by the expressions 2x jelly beans or even p-2 chocolate candies? It all becomes clear when we change our letters x and p into numbers! We can re-use our expressions again and again with different numbers.
We learnt that NASA uses lots of algebra like this (well…a little bit more complicated) to work out very accurate flight paths for space probes as they zip across our solar system, including close fly- byes of giant planets like Jupiter so that they can steal gravitational energy and speed up!
Last week we learnt that aerobic respiration is all about cells getting energy from glucose (sugar) molecules using the chemical reaction:
Oxygen + glucose Water + Carbon dioxide + Energy
Muscle cells, for example, use this energy to do other things such as contracting (getting shorter). Many muscle cells pulling together allow us to move our legs when we walk or run.
We have also learnt that respiration can also occur without oxygen. This is called anaerobic respiration. So our muscle cells in our legs can keep on working, even without enough oxygen. Well. For a little while anyway, until we have to stop because of pain in our legs. Our muscle cells recover when fresh deliveries of oxygen arrive from our red blood cells again. Phew.
We have also been learning about how microbes can work anaerobically making bio-fuel, bread, beer and wine. Thirsty stuff!