Water on EarthGrade 2 Science for Kids

Oceans, rivers and lakes: where water is and how to save it.

Water on Earth helps second graders sort salty and fresh water, follow a raindrop from a mountain to the sea, and test how much water we can save when brushing teeth. Earth science with a real-world message.

  • Grade 2 · Ages 7–8
  • 3 lessons
  • 3 experiments
  • 12 practice questions
  • About 25 min
Start Learning Free Open the Course
  • Salt and Fresh Water
  • Salty or Fresh?
  • From Rain to Sea
  • A Raindrop's Trip
  • Saving Water
  • Tap Test

Science lab course · Grade 2

Water on Earth · Learning goals

What Your Child Will Learn

Sort salty and fresh water, follow a raindrop from a mountain to the sea, and test how much water we can save when brushing teeth.

  • Most water is salty ocean. We drink fresh water from rivers, lakes and rain.
  • Rain falls on mountains, flows into streams and rivers, and reaches the sea.
  • Turning off the tap while brushing saves lots of fresh water.

Why it matters

Why This Matters for Kids

  • Where water is

    Kids learn that most water is salty and only a little is fresh water we can drink.

  • Rivers and oceans

    Following a raindrop helps kids understand how water moves across the land.

  • Saving water

    Simple habits like turning off the tap make kids part of protecting our water.

Inside Water on Earth

How the Course Works

Each level has a short read-aloud lesson, an interactive experiment and a mini quiz.

  1. Step 1 · Lesson

    Salt and Fresh Water

    Most of Earth is covered with water. Most of it is in the salty ocean.

  2. Step 2 · Experiment

    Salty or Fresh?

    Water is all around us. Let's find out which water is salty and which is fresh.

  3. Step 3 · Lesson

    From Rain to Sea

    Rain and melted snow fall on mountains.

  4. Step 4 · Experiment

    A Raindrop's Trip

    Follow a raindrop as it travels. Put its trip in order, from the sky to the sea.

  5. Step 5 · Lesson

    Saving Water

    We use water to drink, wash, cook and water plants.

  6. Step 6 · Experiment

    Tap Test

    Let's measure how much water goes down the drain while brushing teeth with the tap on for different times.

Lesson preview

A Peek Inside the Lesson

This is the real lesson text your child hears, read aloud by a friendly voice.

Salt and Fresh Water

Most of Earth is covered with water. Most of it is in the salty ocean.

Fresh water is not salty. It is in rivers, lakes, rain and ice.

People, animals and plants need fresh water to drink.

From Rain to Sea

Rain and melted snow fall on mountains.

Water flows downhill into small streams.

Streams join together to make a big river.

Rivers flow all the way to the sea.

Saving Water

We use water to drink, wash, cook and water plants.

Clean fresh water is precious. We should not waste it.

Turning off the tap while you brush saves lots of water!

For parents

Try It at Home

Learning sticks best when kids use it in real life. Here are simple ideas from this course.

Parent Tip

Put a bowl under the tap while your child brushes their teeth with the water running. See how much water could be saved.

Salty or Fresh?

  1. Mix a spoon of salt in a glass of water.
  2. Put an egg in plain water, then in the salty water.
  3. In salty water the egg floats!

Most water is salty ocean. We drink fresh water from rivers, lakes and rain.

A Raindrop's Trip

  1. Pile sand in a tray to make a mountain.
  2. Sprinkle water on top with a watering can.
  3. Watch little streams join and flow down!

Rain falls on mountains, flows into streams and rivers, and reaches the sea.

Tap Test

  1. Put a bowl in the sink while you brush with the tap on.
  2. Look how much water you caught!
  3. Use it to water a plant. Next time turn the tap off.

Turning off the tap while brushing saves lots of fresh water.

Practice

Grade 2 Science Practice Questions

Real questions from Water on Earth. Try them with your child, then tap to see the answer.

  1. Question 1

    Where is most of Earth's water?

    • A.In rivers
    • B.In clouds
    • C.In the ocean
    Show answer

    In the ocean

  2. Question 2

    Which way does water flow?

    • A.Downhill
    • B.Uphill
    • C.In circles
    Show answer

    Downhill

  3. Question 3

    How can you save water when brushing?

    • A.Leave the tap on
    • B.Turn off the tap
    • C.Brush in the bath
    Show answer

    Turn off the tap

The full course has 12 questions with instant feedback, stars and rewards. Create a free account to play them all.

Water on Earth · Questions from parents

Frequently Asked Questions

What age is this course for?

Water on Earth is a grade 2 science course for kids ages 7–8. That is Year 3 science in the UK and Year 2 in Australia. It also works well for review in the next grade, or as a challenge for a confident younger learner.

What will my child learn?

Sort salty and fresh water, follow a raindrop from a mountain to the sea, and test how much water we can save when brushing teeth. Along the way they practice: Most water is salty ocean. We drink fresh water from rivers, lakes and rain; Rain falls on mountains, flows into streams and rivers, and reaches the sea; Turning off the tap while brushing saves lots of fresh water.

How long does the course take?

About 25 minutes in total, split into 3 short levels. Most kids finish it over two or three sessions. Progress is saved, so they can stop any time and pick up where they left off.

Is this course free?

Water on Earth is part of SkillBloom Premium, which unlocks every course in every subject. Each subject also has free courses, so your child can try SkillBloom before you decide.

Does my child need to read well to use it?

No. Every lesson has a friendly read-aloud voice, questions are read aloud too, and the pictures help kids follow along. Confident readers can turn the voice off.

Can we use it for homeschool?

Yes. SkillBloom is built for homeschooling families. Kids work through lessons, games and quizzes on their own, and the parent dashboard shows what they finished and which skills need more practice. It works on phones, tablets and laptops.

Keep learning

More Grade 2 Science Courses

All Grade 2 Science Courses

More Grade 2 Subjects

A boy and his monster friend watching the sunset near a castle

Ready for the Adventure?

Join our first families and start learning with SkillBloom.

Get Started Now