HELP ME TEST TMRW ASAP

Agalvanometer has an internal resistance of 100 ω and deflects full-scale at 2.00 ma. what size resistor should be added to the galvanometer to convert it to a milliammeter capable of reading up to 4.00 ma, and how should this resistor be connected to the galvanometer?

Explain earth's motion, using the terms "precession" and "rotation" in your answer.

Explain why you think this diagram shows what happened to the carbon in the biodome.