21st C science 'earth in the universe'

Revision of key terms in P1 MODULE - Suitable for Foundation Level
What U is everything that astronomers observe including our solar system?. What M is the name of our galaxy?. What S is a star whose diameter is 109 times earth's diameter?. What O is a chain of mountains under most oceans?. What F is the source of the sun's energy?. What A is one explanation for the extinction of dinosaurs?. What S is how long since the dinosaurs disappeared?. What N is the number of elements everything is made of?. What P is a method of measuring the distances of stars?. What B is a method of measuring the distances of stars?. What E are planets around distant stars?. What P is a star outside our solar system 4.22 light years away?. What L is a form of energy that interferes with observation of stars?. What G is a huge collection of stars held together by gravity?. What B is a theory on how the universe came into being?. What F is how many million years old the universe is?. What A is a nebulae with a spiral shape?. What M is the most convincing evidence for the big bang?. What E is what is happening to space?. What G is a system that measures the movement of continents?.

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