Topic 5: Processes of Purifying Water Flashcards
(12 cards)
Why do humans need water?
To stay healthy and hydrated because our bodies are largely made up of water.
Why do plants and animals need water?
Plants and animals need water to grow and stay healthy.
Name 5 ways to purify water so it is safe to drink.
Boil the water.
Use a water filter.
Settling the water.
Decanting the water.
Using purification tablets.
How does boiling water help with purification?
By boiling water, you kill germs and bacteria that can cause disease.
How does filtering water help with purification?
Water filters remove dirt and small pieces of dust or sand from the water.
There are different methods of separating mixtures.
Which methods do you think could be used to separate large impurities from the dirty water?
Filtering, sieving, hand sorting
What does it mean to purify water?
To remove harmful substances from the water.
What is clean water?
Water that is free from dirt.
Why do humans, plants and animals need clean water?
Humans need water to stay hydrated and healthy because we consist mostly of water.
Plants and animals need water to grow and stay healthy.
We need plants and animals to be healthy because they are our food.
If you were not sure about the water coming out of the tap, what could you do to the water to purify it?
You can boil the water in the kettle to kill germs and bacteria.
What are the dangers of drinking water from the side of a pond without purifying it first?
You can be exposed to germs and bacteria that cause disease.
There could be chemicals or toxins in the water that can make you ill.
Why do you think is it important to save water?
It is important to save water for:
potential droughts, for the future generation, for economic activity and for health reasons. Without water we will become sick and dehydrated.
