Explain why the sky is blue. 

What happens to the pH of soda water as it loses its carbonation?  

Match the following descriptions with the corresponding type of bonding.   

What is the difference between nuclear fission and nuclear fusion?  

A metal ball is rolling across a flat table and the net force acting on the ball is zero Newtons. Will the ball speed up, slow down or stay at the same speed? Will the ball go in a straight line or curve to the right or left?

State the 4 indications of a chemical change.  

At which electrode does oxidation occur and at which electrode does reduction occur?  

Explain the geometry of why can we see the moon during the daytime?

Which of the following statements best characterizes Wundt’s approach to methodology?

Briefly explain why stars keep a stable size and luminosity for most of their life.