What property of water causes a curved surface?
Water tends to attract and be attracted to other polar molecules. This attraction between water molecules and other polar molecules is called adhesion. When the slope occurs the water surface becomes curved, as shown in the figure.
Why is the element carbon so special?
Carbon is the only element that can form so many different compounds because each carbon atom can form four chemical bonds to other atoms, and because the carbon atom is just the right, small size to fit in comfortably as parts of very large molecules. …
Why is carbon the most important element for life?
Carbon is the most important element to living things because it can form many different kinds of bonds and form essential compounds.
Is water pollution serious?
Some 80 percent of the world’s wastewater is dumped—largely untreated—back into the environment, polluting rivers, lakes, and oceans. This widespread problem of water pollution is jeopardizing our health. Unsafe water kills more people each year than war and all other forms of violence combined.
How can water pollution affect humans?
Contaminated water can harbor bacteria, such as those responsible for diarrhea, cholera, dysentery, typhoid, hepatitis A, and polio. According to the UN, every year, approximately 297,000 children under five die from diseases linked to poor sanitation, poor hygiene, or unsafe drinking water.
What is water pollution give its causes and harmful effects Class 9?
Water bodies in the vicinity of urban areas are extremely polluted. This is the result of dumping garbage and toxic chemicals by industrial and commercial establishments. Water pollution drastically affects aquatic life. It affects their metabolism, behaviour, causes illness and eventual death.
What is water pollution for Class 3?
When rivers pass through cities, dirt, mud, plastic, paper, oil, garbage and chemicals mix in the water, making it water polluted. The harmful things that make water polluted are called Pollutants. Polluted water is not safe for drinking. These pollutants can make water look and smell bad.
What diseases can you get from polluted water?
Water and health. Contaminated water and poor sanitation are linked to transmission of diseases such as cholera, diarrhoea, dysentery, hepatitis A, typhoid, and polio.
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