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Questions and Answers
What is one of the functions of aquatic ecosystems for humans?
What is one of the functions of aquatic ecosystems for humans?
- A room for industrial activities
- A source of water (correct)
- A habitat for terrestrial animals
- A place for space exploration
What do aquatic plants and animals provide?
What do aquatic plants and animals provide?
- Materials for construction
- Commercial fishing opportunities
- Fuel for transportation
- Ecological functions for human survival (correct)
What is an example of the resources provided by aquatic ecosystems?
What is an example of the resources provided by aquatic ecosystems?
- Land for agriculture
- Food (correct)
- Space for parking
- Clean air
What is a recreational activity that humans can enjoy in aquatic ecosystems?
What is a recreational activity that humans can enjoy in aquatic ecosystems?
What is NOT a function of aquatic ecosystems for humans?
What is NOT a function of aquatic ecosystems for humans?
What percentage of fresh water on Earth is found in surface water of lakes, rivers, and swamps?
What percentage of fresh water on Earth is found in surface water of lakes, rivers, and swamps?
Where do brooks usually get their water from?
Where do brooks usually get their water from?
What is the boiling point of water in Celsius?
What is the boiling point of water in Celsius?
What is the percentage of oxygen in water by weight?
What is the percentage of oxygen in water by weight?
What is the relation between creeks, streams, and brooks?
What is the relation between creeks, streams, and brooks?
What percentage of an adult man's body is made up of water?
What percentage of an adult man's body is made up of water?
What is the primary purpose of water in the human body?
What is the primary purpose of water in the human body?
Why do humans need fresh water supplies every day?
Why do humans need fresh water supplies every day?
What is a characteristic of lean muscle, fat, and bones in the human body?
What is a characteristic of lean muscle, fat, and bones in the human body?
What is the correct order of largest water bodies on Earth?
What is the correct order of largest water bodies on Earth?
What percentage of an adult woman's body is made up of water?
What percentage of an adult woman's body is made up of water?
What is an important role of water in the human body?
What is an important role of water in the human body?
What is a term used to describe any significant accumulation of water on the surface of Earth or another planet?
What is a term used to describe any significant accumulation of water on the surface of Earth or another planet?
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Study Notes
Importance of Aquatic Ecosystems
- Aquatic ecosystems provide humans with water, food, and materials.
- They serve as a space for recreation, commercial fishing, and tourism, contributing to economic benefits.
- Aquatic plants and animals play crucial ecological roles that are essential for human survival.
- These ecosystems support a diverse range of aquatic life, maintaining the balance of ecosystems and supporting biodiversity.
Importance of Aquatic Ecosystems
- Aquatic ecosystems provide water, food, materials, and a space for recreation, commercial fishing, and tourism
- They support aquatic plants and animals, which are crucial for our survival through their ecological functions
Uses of Water
- Water is essential for human life, quenching thirst, and performing household tasks
- It is used for agricultural and industrial purposes
- Water is a vital component of human physiology, forming the basis of blood, digestive juices, urine, and perspiration
Forms of Water
- Water bodies come in diverse forms and configurations, ranging from large oceans and seas to small ponds
- Examples of water forms include oceans, seas, lakes, rivers, ponds, waterfalls, etc.
Human Body Composition
- In adult men, approximately 60% of their bodies are comprised of water
- In adult women, about 55% of their bodies are made up of water, due to a higher proportion of fat tissue
- Water is vital for human health, playing a key role in body functions such as nutrient transportation, waste removal, joint protection, and temperature maintenance
Distribution of Fresh Water
- More than 68% of fresh water on Earth is found in icecaps and glaciers
- About 30% is stored in ground water
- Only around 0.3% of fresh water is found in surface water bodies like lakes, rivers, and swamps
Small Bodies of Water
- Brooks are among the smallest bodies of water, often fed by springs or underground aquifers
- Creeks and streams are also classified as small bodies of water, often flowing into larger bodies like rivers
Properties of Water
- Water is a transparent, odorless, tasteless liquid, composed of hydrogen and oxygen (H 2 O)
- It freezes at 32°F or 0°C and boils at 212°F or 100°C
- Water contains 11.188% hydrogen and 88.812% oxygen by weight
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