Final answer:
One square kilometer is equal to 100000000 square centimeters which in scientific notation is expressed as 1.0 × 10⁸.
Step-by-step explanation:
To express 1 square kilometer as 100000000 square centimeters in scientific notation, we first write the number as the product of a coefficient (a number between 1 and 10) and a power of 10.
For 100000000, we move the decimal point eight places to the left to get 1.0, and the exponent will represent how many places we moved the decimal. So, 100000000 in scientific notation is 1.0 × 10⁸ square centimeters.