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Rocks and Minerals: Stories Written in Stone

SheelonEarth ScienceScienceEnglishGrades 6-8Published Aug 6, 2026

Every pebble had a past life as magma, seafloor mud, or something squeezed deep underground. Sort the three rock families and meet the minerals they are made of.

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Play the first 3 free. The rest stay locked until you sign up.

  1. Question 1 of 3

    Rocks are sorted into how many main families?Tap an answer

    Multiple Choice · 20s

  2. Question 2 · unlocks after question 1
  3. Question 3 · unlocks after question 2
  1. Heat and pressure deep underground turn limestone into which prized building stone?Multiple Choice · 20s
  2. On the Mohs hardness scale, which mineral sits at the top with a perfect 10?Multiple Choice · 20s
  3. Most rocks are mixtures of several different minerals.True / False · 20s
  4. Which natural glass forms when lava cools too quickly for crystals to grow?Multiple Choice · 20s
  5. What surprise hides inside a geode, a rock that looks plain from the outside?Multiple Choice · 20s
  6. Pumice, a volcanic rock, is so full of gas bubbles that it can float on water.True / False · 20s
  7. Which of these is one of the most common minerals in Earth's crust, found in most sand?Multiple Choice · 20s
  8. What do we call a scientist who studies rocks and what they reveal about Earth? (one word)Type Answer · 30s
  9. Which gemstone, the hardest natural material, is made of pure carbon? (one word)Type Answer · 30s

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