Freshwater

Freshwater is a vital resource for life on Earth, but what exactly is it? In this lesson, we will explore freshwater, including its sources, properties, and importance.

What is freshwater?

Freshwater is a type of water that contains low levels of dissolved salts and minerals. It is found in lakes, rivers, streams, and groundwater, and it is essential for life on Earth. While freshwater makes up only 3% of the world’s water supply, it is the source of drinking water for humans and many animals.

Sources

There are various sources of freshwater, including surface water and groundwater. Surface water is found in lakes, rivers, and streams, while groundwater is located underground in aquifers. Precipitation, such as rain and snow, is the primary source of freshwater, as it replenishes lakes, rivers, and groundwater supplies.

Properties

Freshwater has several properties that make it unique. It has a lower salt content than seawater, and it freezes at a higher temperature. The pH of freshwater is typically neutral, but it can vary depending on the location and any pollutants or contaminants present in the water.

Freshwater is essential for all living organisms, including humans. It is used for drinking, cooking, cleaning, and irrigation. Freshwater also supports many ecosystems, including wetlands, rivers, and lakes, which provide habitats for various species of plants and animals. However, freshwater resources are becoming increasingly scarce due to factors such as climate change, pollution, and overuse.