What are two parts of the water cycle in which contaminants can be introduced?
There are many places where contaminants may enter the water cycle. Contaminants in the air can dissolve into precipitation that falls to Earth. Surface water and groundwater dissolve many chemical substances as they flow to the ocean. These can include salt and toxic chemicals (toxins).
What are the two parts of the water cycle?
The water cycle is often taught as a simple circular cycle of evaporation, condensation, and precipitation.
What are the two main categories of contaminants in water and why are they a problem?
These contaminants may be naturally occurring or man-made. Examples of chemical contaminants include nitrogen, bleach, salts, pesticides, metals, toxins produced by bacteria, and human or animal drugs. Biological contaminants are organisms in water. They are also referred to as microbes or microbiological contaminants.
What is the first step of the water cycle?
The first step of the water cycle is evaporation. About 85% of the water vapor in the air comes from water that evaporated from the oceans. The other 15% comes from evapotranspiration, which is a catch-all term for water that evaporates from over land.
Which is the largest lake in the world class 7?
sea is the largest lake. Ans. 6. Caspian….Free Resources.
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Which is the largest lake in the world answer?
The Top Ten: The Ten Largest Lakes of the World
|Rank||Name, Location||Area (sq. miles)|
|1.||Caspian Sea, Azerbaijan-Russia-Kazakhstan-Turkmenistan-Iran (salt water)||152,239|
Which is the largest freshwater lake in the world answer?
What does salinity of water Class 7 mean?
The amount of salt dissolved in per unit volume of ocean water is known as the salinity of ocean water.