1. There are about 1.4x10^9 cubic kilometers of water on Earth. About 2.5% of water is fresh water.How much is fresh water is on Earth?
To calculate the amount of fresh water on Earth, we need to find 2.5% of 1.4x10^9 cubic kilometers.
2.5% can be written as 0.025 in decimal form.
0.025 x 1.4x10^9 = 35x10^6 cubic kilometers
Therefore, there are approximately 35x10^6 cubic kilometers of fresh water on Earth.