MCAT Question of the Day
    •

    Q:

    		 An aurora, like the Northern Lights, is caused by high energy particles interacting with atmospheric gasses like nitrogen and oxygen. These gases emit the light when which of the following occurs?
    		 

    A

    		 The charged particles enter the vicinity of the gas molecules.

    B

    		 The electrons in the gas atoms are excited to a high energy state.

    C

    		 The electrons in the gas atoms drop from a high to a low energy state.

    D

    		 The electrons in the gas atoms are lost.



    Atomic & Electronic Structure |
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