FS1 - Describe the distribution and characteristics of water in local and global environments and identify the significance of water supply and quality to the needs of humans and other living things.

FS1.1: How do we get water to survive and how much are we actually using?

• 97.2% of the world’s water is saltwater (oceans), and 2.8% is freshwater (lakes, rivers, glaciers, etc.)

  • Only 0.8% is avaible for humans to use, and the rest is locked up in glaciers

    • 10% is used for domestic purposes, 20% is used for industry, and 70% is used for agriculture

• Freshwater is renewed through the water cycle

  • Run-off - flows over land as surface water and is not absorbed into the ground

  • Groundwater - hidden water that collects beneath the Earth’s surface

• Hidden water is the amount of water that we don’t think about when buying things (how much water is ACTUALLY being used to produce something)

FS1.2: How is water quality affected by human activities?

• Transluscent:

  • Lets some light pass through it

  • Light is transmitted

  • Examples: Frosted glass, wax paper, cloudy water

• Transparent:

  • Lets the most light through it

  • Light is transmitted

  • Examples: Window, seran wrap, clear plastic

• Opaque:

  • Lets no light pass through it

  • Usually solid

  • Light is absorbed or reflected

  • Examples: Blackout curtains, concrete walls, doors, people