1	what is life?
2	why is the sky blue?
3	What is the true mass of all the water on the earth?
4	How do tectonic plates move?
5	Calculate the mass of the oceans.
6	How would you go about calculating the total amount of energy reaching the Earth’s surface?
7	You have a picture of a rainbow. Which colour would fade first?
8	How does the age of ice change as you walk up a glacier?
9	How would you calculate the number of molecules of H2O in the ocean?
10	How do mountains originate?
11	Why did the dinosaurs become extinct?
12	What do you believe would be the major differences on Earth if, a) no atmosphere had ever formed? b) there was no water? c) plate tectonics did not exist?
13	Suggest a list of conditions necessary to sustain life on Earth?
14	I was asked to comment on some specimens and to consider straightforward problems in chemistry and physics