Salt Water vs Fresh Water
Describe and graph the amounts of salt water and fresh water in various reservoirs to provide evidence about the distribution of water on Earth
Lesson
Set out your lesson
“Salt Water vs Fresh Water means most of Earth’s water is salt water in oceans, and only a little is fresh—shown with a simple graph of reservoirs. We will compare amounts, draw bars, then check a fresh reservoir idea.”
Bring to the table
- Paper bar graph template; blue crayon/marker
- Two cups labeled Salt water (oceans) and Fresh water (tiny amount) with water levels showing “most vs little” — optional pinch of salt in one cup for taste-smell demo adult-only
Extra for the adult
Worked example. Oceans hold most of Earth’s water (salt). Fresh water in lakes and rivers is a small part—your graph shows that.
Optional challenge. For Salt Water vs Fresh Water, add ice/glacier as a fresh-water bar and keep it smaller than the ocean bar.
What to notice. Keep one parent note: graph; most/little language; support used. A photo of the bar graph helps. This session samples water distribution, not mastery of hydrology.
Share and support
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Teaching approaches
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1 approach
Salt Water vs Fresh Water means most of Earth’s water is salt water in oceans, and only a little is fresh—shown with a simple graph of reservoirs. We will compare amounts, draw bars, then check a fresh reservoir idea.
Spend about 14 minutes comparing salt vs fresh amounts and graphing them, then checking one reservoir fact.
Family records and proof options
Keep a record of your learning
Save photos, notes, and attendance. Export a proof packet for compliance or portfolio reviews.
Practice this concept
Start practiceSalt water vs fresh water practice
Compare and graph salt vs fresh water amounts on Earth.
Free · no login · no ads · Practice answers and completion are not saved. Parent observation remains the lesson record.
Learning resources
Extra practice links — they do not replace Gakuva’s teaching approach.
NOAA Ocean Service · Practice link — not the full lesson
Why should we care about the ocean?
Before you open · source notes
Why should we care about the ocean? supports Salt Water vs Fresh Water. An adult previews and guides; this is a learning page, not a scored quiz.
Free educational page, no sign-in required for the tested path.
Before you openAsk the learner one fact they learned and one question they still have.
Opening this link does not save learning or assess mastery.
Source, access and review notes
Public NOAA Ocean Service page. An anonymous GET on 2026-11-12 returned HTTP 200 with no login or payment prompt for this URL. Opening the link does not save practice or assess mastery. An adult should preview and guide the learner.
NOAA Ocean Service. “Why should we care about the ocean?.” External page; Gakuva does not copy, host, embed, or redistribute materials.
Unknown — link only
Check understanding
- State that about 97% of Earth's water is salt water in the oceans
- Describe where fresh water is found: glaciers/ice caps, groundwater, rivers, lakes
- Create or interpret a graph showing the relative amounts of salt water vs fresh water
“Can your child explain that most of Earth's water is salty ocean water, and only a tiny fraction is the fresh water we drink, and show this on a graph?”
Curriculum record
- Type
- Conceptual
- Subject
- Science
- Domain
- Earth's Systems
- Age range
- Ages 9–11
Standards