AP BIOLOGY

Detailed explanation-1: -Oceans are the largest reservoir. Frozen hydrosphere is the largest reservoir of fresh water, but ground water is the largest AVAILABLE source of fresh water.

Detailed explanation-2: -The oceans are, by far, the largest reservoir of water on earth-over 96% of all of Earth’s water exists in the oceans. Not only do the oceans provide evaporated water to the water cycle, they also allow water to move all around the globe as ocean currents.

Detailed explanation-3: -The ocean, by far the largest reservoir in the hydrosphere, covers about 70.8% of the planet’s surface and has an average depth of approximately 3.8 km (2.4 mi) but accounts for only 0.02% of Earth’s mass. About 97% of the hydrosphere is ocean salt water.

Detailed explanation-4: -The major reservoir for water in the hydrological cycle is the ocean of earth.

Detailed explanation-5: -Water moves through the hydrosphere in a cycle. Water collects in clouds, then falls to Earth in the form of rain or snow. This water collects in rivers, lakes and oceans. Then it evaporates into the atmosphere to start the cycle all over again.