WATER POLLUTION What does pollution mean Pollution Pollution

WATER POLLUTION What does pollution mean

Pollution • Pollution is when we add things to the ground, the air, or the water that will make it dirty or will bring harm to the life in and around it. • Pollution in our oceans, lakes, rivers and streams is a very serious matter.

Today we are looking at; • Processes of matter in water, air & land (CC 3) • Solutions, solids, acids, bases & p. H (CC 5) • Some chemical processes in soil, air & water from the environment & health (CC 6)

Is all water on our planet clean? • The water in our rivers and oceans are polluted by materials from humans. • The dumping of sewage, plastics, chemicals and the spillage of oil are all having an effect on the quality of water in the Water Cycle.

Pollution in the Oceans Plastics deepsea. co. za Oil spills topnews. ae

Pollution in the Oceans Ropes and fishing nets hd 2 o. tv

Pollution in the Oceans Sewage dadecosurf. com zmetro. com

Great Pacific Garbage Patch mercurynews. com

Pollution in rivers Plastics hipmomsgogreen. com

Pollution in rivers Sewage stuckincustoms. com

Farming & Fertilisers • These make the plants grow faster in the water. • This stops light reaching other water plants, and also reduces the amount of dissolved oxygen in the water. • Fish rely on this dissolved oxygen: without it, they die. • Nitrates from fertilizers can also find their way into our drinking water. • There are limits set for the amount of nitrate that we can drink safely. • Nitrates may cause stomach cancers.

Our Waters • People often dump liquids into oceans, lakes, rivers and streams. Some of these liquids will mix with water; others will not. • Which liquids mix with water? • Which liquids will not mix with water? • How do they get rid of the liquids in our water?

Task (KR 13) • Explain how and why water gets polluted. • Describe why pollution can be a threat to life • Discuss effects on the future of the ecosystem Extra • How can a lack of water lead to conflict between humans?