What is the scientific notation for 0.0001

Scientific notation is written as

(number>1 and <10) times (10^x) so

count how many decimal places must be moved for the number to be >1 and <10

the number must be 1.0 or 4 decimal places

put that in the x

but it makes the number bigger so make x negative

1 times 10^-4 is the scientific notation