Water: More Than Meets the Eye

Without the right answers, so they're still a surprise when you play.

1. Question 1

   At the top of Mount Everest, water boils at roughly what temperature?

   • 100 °C
   • 70 °C
   • 120 °C
   • 110 °C

2. Question 2

   Why do icebergs float?

   • Ice is less dense than liquid water
   • Ice is denser, but currents hold it up
   • Trapped water vapour lifts the ice
   • Salt water freezes into lighter ice

3. Question 3

   Where is most of Earth's fresh water found?

   • In lakes and rivers
   • In underground aquifers
   • In ice caps and glaciers
   • In clouds and the atmosphere

4. Question 4

   How well does perfectly pure water conduct electricity?

   • Very well, like a metal
   • Fairly well, like tap water
   • Very poorly
   • Well, but only when warm

5. Question 5

   At what temperature is liquid fresh water at its densest?

   • 0 °C
   • 4 °C
   • −4 °C
   • 100 °C

6. Question 6

   What shape is a single water molecule?

   • Straight line
   • Bent, like a V
   • Flat triangle
   • Four-sided pyramid

7. Question 7

   What are clouds mostly made of?

   • Water vapour gas
   • Tiny droplets and ice crystals
   • Steam from the oceans
   • Dust with vapour around it

8. Question 8

   Roughly what share of all water on Earth is fresh?

   • About 3%
   • About 30%
   • About 50%
   • About 15%

9. Question 9

   What does a pinch of salt in a pan of water actually do?

   • Makes it boil much faster
   • Barely changes its boiling point
   • Lowers its boiling point a lot
   • Stops it from ever freezing

10. Question 10

    The white cloud above a boiling kettle is…

    • pure invisible steam
    • water vapour gas
    • condensed water droplets
    • hot air rising