Podcast
Questions and Answers
Which of the following processes would be most effective in removing large debris from a freshwater source?
Which of the following processes would be most effective in removing large debris from a freshwater source?
- Sterilization
- Distillation
- Filtration
- Screening (correct)
Why are both reverse osmosis and distillation considered expensive methods for producing potable water from saltwater?
Why are both reverse osmosis and distillation considered expensive methods for producing potable water from saltwater?
- They produce large amounts of waste that must be disposed of properly.
- They consume significant amounts of energy. (correct)
- They involve chemical processes that require expensive reagents.
- They require specialized equipment that is costly to maintain.
Which of the following is a characteristic of a finite resource?
Which of the following is a characteristic of a finite resource?
- Will eventually run out if consumed continuously. (correct)
- Is only available in unlimited quantities.
- Will not run out, irrespective of consumption rate.
- Replenishes at a rate equal to or faster than its consumption.
In the context of water purification, what is the purpose of aerobic digestion in the treatment of waste water?
In the context of water purification, what is the purpose of aerobic digestion in the treatment of waste water?
When does complete combustion occur, and what is its primary product?
When does complete combustion occur, and what is its primary product?
Which of the following best describes why seawater is not considered potable?
Which of the following best describes why seawater is not considered potable?
What is a key distinction between distilled water and potable water?
What is a key distinction between distilled water and potable water?
Which sequence correctly orders the stages of purifying fresh water from a reservoir?
Which sequence correctly orders the stages of purifying fresh water from a reservoir?
What is the primary role of filtration in the purification of fresh water?
What is the primary role of filtration in the purification of fresh water?
Which of the following is an example of a renewable resource?
Which of the following is an example of a renewable resource?
Flashcards
Renewable resources?
Renewable resources?
Resources that will not run out.
Finite resources?
Finite resources?
Resources that will eventually run out.
Potable water
Potable water
Water that is safe to drink; contains safe minerals.
Complete combustion
Complete combustion
Signup and view all the flashcards
Incomplete combustion
Incomplete combustion
Signup and view all the flashcards
Salty water desalination
Salty water desalination
Signup and view all the flashcards
Screening (water purification)
Screening (water purification)
Signup and view all the flashcards
Filtration (water purification)
Filtration (water purification)
Signup and view all the flashcards
Sterilization (water)
Sterilization (water)
Signup and view all the flashcards
Settlement (waste water purification)
Settlement (waste water purification)
Signup and view all the flashcards
Study Notes
- Earth’s resources are divided into renewable and finite resources.
- Renewable resources will not run out.
- Finite resources will eventually run out.
- Examples of renewable resources include wood, biodiesel, bioethanol, water, cotton, and bamboo.
- Examples of finite resources include crude oil, coal, sand, clay, iron, and natural gas.
Potable Water
- Complete combustion occurs when oxygen is abundant and CO2 is produced.
- Incomplete combustion occurs when oxygen isn’t plentiful and CO is produced.
- Distilled water is chemically pure with just H2O molecules.
- Seawater contains lots of dissolved substances making it unsafe to drink.
- Distilled water is potable, containing safe minerals.
- Waste water is not potable due to harmful microbes and dissolved substances, but it can be treated.
Water Purification
- Potable water from salty water desalination must be produced by either reverse osmosis or distillation.
- Both processes are expensive because they require lots of energy.
Fresh Water Purification
- To purify fresh water (e.g. from a reservoir), the process involves:
- Screening: Filters out large debris.
- Filtration: Removes small insoluble solids, soluble solids, and microbes.
- Sterilisation: Achieved either by adding chlorine, pumping ozone through it, or using UV light.
Waste Water Purification
- To purify waste water (produced by human activity), the process involves:
- Screening
- Filtration
- Settlement
- Sludge is heated and dried for fertiliser.
- Aerobic digestion is conducted by microbes to eliminate harmful microorganisms.
- Sterilisation
Salty water (ocean water) purification
- To purify salty water (ocean water), the process involves:
- Filtration
- Desalination
- Reverse osmosis
- Distillation
- Sterilisation
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Explore Earth's division of resources into renewable and finite categories, with examples. Learn about potable water, distinguishing between distilled, sea, and waste water. Understand water purification through desalination, reverse osmosis and distillation.
