10 Questions
What percentage of Earth's water is freshwater that is suitable for drinking?
3.5%
What is the largest contributor to freshwater on Earth?
Ice and glaciers
If all the water on Earth were combined, what would be its approximate size?
860 miles wide
What percentage of Earth's water is salt water?
96.5%
What is a unique characteristic of the human body?
It is comprised mostly of water
What is the main component of salt water?
sodium chloride
Where is the majority of freshwater found?
in ice and glaciers
What is the smallest portion of freshwater found in?
water vapor in the atmosphere
What would the combined water on Earth form if it were gathered together?
a massive ball
What is the primary component of the human body?
water
Study Notes
Earth's Water Composition
- Water covers 71% of Earth's surface.
- 96.5% of Earth's water is salt water, which contains various salts, mainly sodium chloride.
- Only 3.5% of Earth's water is freshwater that is suitable for drinking.
Distribution of Freshwater
- 68% of freshwater is trapped in ice and glaciers.
- A third of freshwater is in the ground, known as groundwater.
- The remaining 2% of freshwater is in rivers, lakes, and streams.
- A very small amount of freshwater exists as water vapor in the atmosphere, forming clouds.
Interesting Facts
- If all the water on Earth were combined, it would form a massive ball 860 miles wide.
- The human body is comprised mostly of water.
Earth's Water Composition
- Water covers 71% of Earth's surface.
- 96.5% of Earth's water is salt water, primarily composed of sodium chloride and other salts.
- Only 3.5% of Earth's water is freshwater suitable for human consumption.
Distribution of Freshwater
- 68% of freshwater is trapped in ice and glaciers.
- A third of freshwater is stored underground, known as groundwater.
- 2% of freshwater is found in rivers, lakes, and streams.
- A small amount of freshwater exists as water vapor in the atmosphere, forming clouds.
Interesting Facts
- If all of Earth's water were combined, it would form a massive ball 860 miles in diameter.
- The human body is largely composed of water.
Earth's Water Composition
- Water covers 71% of Earth's surface.
- 96.5% of Earth's water is salt water, primarily composed of sodium chloride and other salts.
- Only 3.5% of Earth's water is freshwater suitable for human consumption.
Distribution of Freshwater
- 68% of freshwater is trapped in ice and glaciers.
- A third of freshwater is stored underground, known as groundwater.
- 2% of freshwater is found in rivers, lakes, and streams.
- A small amount of freshwater exists as water vapor in the atmosphere, forming clouds.
Interesting Facts
- If all of Earth's water were combined, it would form a massive ball 860 miles in diameter.
- The human body is largely composed of water.
Learn about the composition of Earth's water, including the percentage of saltwater and freshwater, as well as the distribution of freshwater across the planet.
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