Water Ch 3 [AI generated]

What is a resource?

• a material identified by people to be useful.

• something that enables tasks to be carried out.

Answer explanation

Usefulness is key to whether something is considered to be a RESOURCE.

Culturally:
People from diverse cultures may use materials differently. Concrete is useful for city dwellers, but may be useless to people like the Penan who live in the rainforests and are skilled craftsmen at making homes from wood.

Technology:
As technology progresses and machines are invented, different materials become more useful than others. In the past, buffalos were used to operate the first farm machines, but as powerful engines and heavy machineries were developed, buffaloes were seen as less valuable resources.

What are the classification types of natural resources?

• Manmade vs Natural

• Renewable vs Non-renewable

• Plants vs Animals,

• Water vs Air

What are some ways people use natural resources sustainably?

• Burning, Disposing, Extracting, Consuming

• Wasting, Contaminating, Depleting, Damaging

• Recycling, Reusing, Reducing, Conserving

• Overexploitation, Pollution, Deforestation, Mining

Answer explanation

The correct ways people use natural resources sustainably are by recycling, reusing, reducing, and conserving them, which helps in minimizing waste and preserving the environment for future generations.

What is the physical state of water when it appears as water droplets?

• Liquid

• Gaseous

• Plasma

• Solid

How much of Earth's water can be found in the oceans?

• 9%

• 50%

• 95-98%

• 100%

Answer explanation

•  Water stores are places where water is contained in and can be categorised as freshwater and saltwater stores.

•  Glaciers, rivers, lakes, groundwater and soils contain freshwater, which means they contain water with low amounts of salt that can be used more readily. 

•  Oceans are saltwater stores, which means that the ocean water has too much salt to be used directly.

Why is water available on earth?

• Due to human intervention

• Because of the hydrological cycle

• As a result of industrial activities

• From extraterrestrial sources

Answer explanation

Water is available on earth because of the hydrological cycle, which involves the continuous circulation of water through the atmosphere, land, and oceans.

What is the hydrological cycle?

• A method to extract water from underground reservoirs

• A process to remove water from the environment

• A man-made system for water distribution

• A sequence of processes that ensure water is naturally replenished on Earth

Where can freshwater be found?

• Lakes

• Glaciers

• Oceans

• Soil

What is the river source?

• Desalination plants

• The point where the river begins

• Where the river flows into another water body

Answer explanation

•  E.g. Kallang River starts from Lower Peirce Reservoir (river source), and flows into the sea through Marina Channel (river mouth).

How is water present in soil?

• In the pores (small openings) in soil.

• As soil moisture.

• As groundwater

Answer explanation

When it rains, water passes through the soil through pores. water that is stored in the soil is known as soil moisture.

On the other hand, Groundwater is deeper down, when water makes its ways to the rocks beneath, filling up pores and cracks in the rocks.