What kind of damage would you expect if there was a magnitude 4 earthquake on the Richter Scale?

Ineed with my science work! it’s due tomorrow!

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?