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Arrange the following images of an aqueous base solution in order of increasing base strength:

Thermal radiation is defined as 

On a cosmic calendar, in which the history of the universe is compressed into 1 year, when did the dinosaurs become extinct? 

If you heat a gas so that collisions are continually bumping electrons to higher energy levels, when the electrons fall back to lower energy levels the gas produces 

X-rays from astronomical objects can only be detected from telescopes in space.

Given the following generic chemical reaction, which is the product? X → Y

Which of the following is not a conserved quantity? 

What is granulation in the Sun? 

Based on the information given in the following diagrams, which substance has the lower boiling point: one made from molecule A or one made from molecule B?

What layer of the Sun are we seeing in this photograph, and in what wavelength band was it photographed?