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Salt Water & Fresh Water Training Center

Ari Raider's Training Materials · Deep Sea Quest · Training Center 4 of 6

Salt Water & Fresh Water

Pearl Grotto has clamped shut with a freshwater spring still running inside it. Salt water and fresh water are not the same water — and Earth holds far less of one than most people think.

What you're training for

At Pearl Grotto, the room-sized shell only opens when every water is told apart: salt, frozen fresh, and liquid fresh. Train here first; prove it in the simulation.

The science

  • Almost all of Earth's water — about 97% — is salt water in the ocean.
  • Most of the fresh water is frozen in ice caps and glaciers, out of reach.
  • Only a small sliver of all Earth's water is liquid fresh water — rivers, lakes and underground — and that sliver is what every land plant, animal and person drinks.
  • Which is why protecting fresh water matters: the ocean is vast, but the drinkable part of Earth's water is precious and small.

Teach it today — one litre of water

The whole world in a jug. A litre of water is all Earth's water. Pour out about 30 mL — that's all the fresh water. Freeze-tag two-thirds of that (about 20 mL) as ice caps. What's left — roughly a tablespoon — is every river, lake and well on Earth. Nobody forgets the tablespoon.

Trained and ready? Prove it at Stop 4 — Pearl Grotto. Free, no logins, progress saved on the device.

Enter the Realm at Stop 4

Resources in this training center

Worksheets, reading passages, flashcards and printables for this lesson are being added — new resources land here first. Get one email a month when they do, or browse the whole free library.

The hands-on half: the Deep Sea Quest Adventure Kit puts six real specimens — abalone shell included — plus six Digs, six Gemlings and the Realm map in your students' hands. $19.99, or $15 a student for classrooms.

More Deep Sea Quest training

Coral Reefs · Ocean Zones · The Sea Floor · Salt & Fresh Water · Sonar & Depth · Bioluminescence · Enter the Adventure →

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