Optional Activities
Optional Activities
Balloon-Print Art

Goal: 
Show how Earth has changed from a molten planet to the life-filled world we live on today, using balloon-print techniques to represent each phase.

Phases of Earth to Depict
  • Molten Earth (Just after formation – ~4.5 billion years ago)
    • Colors: Reds, oranges, black
    • Notes: Hot, fiery surface with constant volcanic activity
  • Cooling Crust
    • Colors: Dark brown, gray, black with hints of red
    • Notes: First crust forming, still unstable and broken
  • Water World
    • Colors: Deep blues and lighter grays
    • Notes: Oceans form from atmospheric condensation; mostly water-covered
  • Early Atmosphere & First Life
    • Colors: Blue with green and white streaks
    • Notes: Cyanobacteria begin photosynthesizing, adding oxygen to the atmosphere
  • Modern Earth
    • Colors: Blue, green, white, and brown
    • Notes: Continents, weather patterns, life—our planet as we know it
Instructions

Prep the Paper
Give learner(s) 5 pieces of paper (or one large paper divided into 5 sections).
  • Balloon Printing
  • For each version of Earth:
  • Use different paint colors for each stage.
  • Press the balloon onto paint and stamp into the designated space.
  • Blend or layer paints to show transitions (e.g., swirling red and orange for molten Earth, swirling blue for oceans).
  • Details & Labels (optional, lvl 2)
  • Once dry, learners use markers to add:
  • Names and descriptions for each phase
  • Arrows or timeline labels
  • Simple icons like volcanoes, clouds, continents, or microbes

Tips:
  • Half-inflate balloons— easier to handle.
  • Use sturdy paper or canvas for better paint absorption.
  • Recycling concept: leftover prints can be turned into cards!

Videos to Watch

Earth's Layers and Density
Big Idea:
When Earth was young and melted, denser materials sank to the center, and lighter materials floated to the top—just like in this experiment!

What You’ll Need:
  • A clear glass or jar
  • Water
  • Corn syrup or honey
  • Vegetable oil
  • A spoon or dropper
  • Optional: small solid items of different densities (like a pebble, a grape, a plastic bead, a cork)
Steps:
  1. Pour in the heaviest liquid first (corn syrup or honey) — this is your inner core.
  2. Slowly pour water on top — this is your mantle.
  3. Gently add vegetable oil — this is your crust.
  4. Watch the liquids form layers!
  5. Optional: Drop in small solid objects. Which ones sink? Which float? Which stay in the middle?
Level 1 Explanation:
When Earth was very hot and melted, the heavy stuff (like metal) sank to the bottom, and the lighter stuff floated on top. That’s how Earth got layers!

Level 2 Explanation:
When Earth first formed, it was extremely hot—so hot that the whole planet was mostly melted.
Because of that, materials inside Earth were able to move and separate based on their density:
  • Denser materials (like iron and nickel) sank toward the center.
  • Lighter materials (like silicates) floated toward the top.
This process is called planetary differentiation (they don't need to know this term!) and it’s why Earth has layers today:
  • Core (the densest layer)
  • Mantle
  • Crust (the least dense layer)
In our experiment:
  • Honey or corn syrup represents the core—it's the heaviest and sinks to the bottom.
  • Water represents the mantle—it's lighter than syrup but heavier than oil.
  • Oil represents the crust—it floats on top because it's the least dense.
When we add small objects (like pebbles or beads), we can see that where they settle depends on their density, just like how real materials moved inside the early Earth.

Videos to Watch
I have completed this lesson Next Lesson