Mionel Pessi
Give 2 examples of natural water sources
Rivers
Water streams
Ground waters
Rainwaters
Water springs
Oceans
Seas
What is rainwater used for? (Mention two uses)
Household activities
Watering plants
Flushing toilets
Drinking water, (if filtered correctly)
Other, if correct
Can ground waters be 1000 years old?
Yes, Millenia layer.
How is rainwater formed?
Moisture in the Earth's atmosphere condenses into water droplets and falls to the ground due to gravity
Explain what is meant by a biodegradable material.
Can be broken down naturally by biological processes.
What are uses of spring water? (Mention 2 uses)
Drinking water
Irrigation
Water source for ecosystems
What percentage of Earths surface is covered by Oceans?
71%
State main disadvantage of metal compounds in natural water sources.
Industrial waste from chemical plants and factories such as lead and mercury makes water unsuitable for life
Where specifically does ground water accumulate?
Within aquifers
Name two differences between rivers and water streams.
1) Rivers have steady and continuous water flow
2) Rivers are larger, wider
3) Rivers support diverse aquatic life due to their size and stable flow
4) Rivers are used for transportation, irrigation, and hydropower generation
Explain what "desalination" means.
It is a process which removes high amount of salts from the sea water makes it safe drinkable and water
When did oceans form?
Formed when earth cooled down to -100 degrees Celsius 3.8 billion years ago.
Name 7 types of natural water sources
rivers, water streams, ground water, rainwaters, water springs, oceans, seas
How temperature affects dissolved oxygen levels in the water?
Higher temperatures reduce dissolved oxygen levels.
How pressure affects levels of dissolved oxygen in water?
Higher pressure increases oxygen solubility, thus there will be a more dissolved oxygen in water with high pressure than low.