Water Pollution
What is water pollution?
Water becomes unsafe when harmful substances like chemicals, plastic, or sewage enter it.
What is coagulation?
This first step makes tiny particles stick together into “floc.”
What is air pollution?
Air becomes dirty because of harmful gases and particles in the air.
What is acid rain?
This type of rain has a pH lower than normal because of air pollution.
What are fossil fuels?
Coal, oil, and natural gas are this type of energy resource.
What are pollutants?
These harmful things—like chemicals, oil, and sewage—dirty the water.
What is sedimentation?
In this step, heavy particles sink to the bottom of the tank.
What are greenhouse gases?
These gases, including carbon dioxide, trap heat in our atmosphere.
What is the ph Value of a neatral substance?
7
What is renewable energy?
It's a natural form of energy that can be continuously used without running out.
What is an oil spill?
When oil leaks from ships into the sea, this dangerous event occurs.
Which step removes the small impurities.
Filtration
What is global warming?
This global problem happens when Earth’s average temperature rises.
Name 2 sources of acid rain due to human activities
burning fossil fuels, emissions from vehicles, oil refineries.
What is geothermal energy?
Heat from inside the Earth is used to boil the cold water injected. The steam from inside the Earth can then be used to push the turbines (that are connected to generators) to generate electricity.
Name 2 effects of water pollution
Animals get hurt or die, Oil can cover birds and sea animals, Oil kills plants and covers beaches and wetlands, loss of habitat, Oil makes the water dirty and can poison the fish
Name two possible metods used in the disinfection stage.
Chemicals like chlorine or ozone are added in this step to kill bacteria. UV lights
Name 2 causes of air pollution
When a substance has a ph value of 1 - 6, it is called ....
acidic
Name 3 renewable energy sources
Solar energy, hydro energy, geothermal energy, wind energy, biomass energy
Name 2 sollutions to water pollution.
do not overuse fertilisers and pesticides
Always use the correct waste bins
plant more trees
save water
do not throw waste into the sink
Name the 4 steps of water treatment in the correct order.
1. Coagulation, 2. Sedimentation, 3. filtration 4. disinfection
Name 2 effects of air pollution
Global warming, melting ice caps, Poor air quality impacting the resipratory system.
Name 2 effects of acid rain
stops fish eggs from hatching, affects the food chain, remove minerals and nutrients from soil, damage buildings.
Name 2 problems of non-renewable energy sources
Burning fossil fuels produces greenhouse gases.
There is only a limited amount of coal, gas, and oil. It takes millions of years for fossil fuels to form and are now being used up far more quickly than they are being replenished.