Mod P1-3 21st Century Science Summary

Overview of the work studied in Modules P1-3 of 21st Century Science.
What S is how many million years ago dinosaurs became extinct?. What M is the name given to our galaxy?. What W is the name of the scientist who suggested continental drift?. What C is the name of the impact crater which though to have wiped out the dinosaurs?. What F is the process which powers the Sun?. What I is SETI looking for in deep space?. What H is the scientist who showed that the Universe is expanding?. What B is the theory that the Universe started 13.7 billion years ago?. What O is the layer that stops a lot of UV reaching the Earth's surface?. What E is the family of waves that light, radio and X-rays belong to?. What P is a "packet" or "particle" of light?. What I is radiation such as X-rays and gamma rays?. What A happens to microwaves when they pass through food in a microwave oven?. What B is the organ that may absorb unhealthy amounts of microwaves when using a mobile?. What G is caused by greenhouse gases?. What U is the element used to fuel nuclear power stations?. What R is the radioactive gas produced by some rocks?. What N is the name of the central part of an atom?. What F is the process where atoms are split to release energy?. What L is the type of radioactive waste that is the least dangerous?.

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