Final answer:
When comparing numbers in scientific notation, the number with the larger exponent is bigger.
Step-by-step explanation:
When comparing the numbers represented in scientific notation, we need to consider both the coefficient (the number before the multiplication symbol) and the exponent (the number after the multiplication symbol).
In this case, 1 times 10²⁵ can be written as 1 x 10^25 and 1 times 10²³ can be written as 1 x 10^23. Since the exponents are different, we can determine which number is bigger by comparing their exponents. A larger exponent indicates a larger number. Therefore, 1 x 10^25 is bigger than 1 x 10^23.