For scientific notation, when i move the decimal to the left the the exponent get bigger or smaller?

I'm not sure what you mean. Besides, I feel like you're talking math.

But anyways, if you have 120 let's say

The scientific notation is 1.20 * 10^2

if you have 125000

the scientific notation is 1.25 * 10^ 5

The number of times you go left the decimal, I guess exponent increases

So yea