Videos: Wacky Science Rockets, Ooze & More

November 21, 2010

Kids of all ages watched as the scientists of the Bermuda Institute of Ocean Sciences [BIOS] brought science to life during their Marine Science Day held yesterday [Nov 20].

The ‘Wacky Science Demonstration’ was repeated at various intervals through the day, and lead by BIOS education officer JP Skinner. You can view photos of the ‘Wacky Science’ here, and videos below:

Marshmallows being puffed up and deflated :

“Ooze” [recipe posted below]

“Rockets” made from vinegar and baking soda:

Straw Plane:

BIOS provided a ‘recipe’ for the “Ooze” which follows below:

You will need

  • Water
  • Corn Starch
  • Food Colouring (optional)
  • Mixing Bowl

Choose a place that’s safe to get messy (a counter top near a sink is best)

Pour several handfuls of corn starch in the bowl, add a little water and stir the paste with your finger slowly. Keep adding water until all the powder is mixed in, the Ooze should thoroughly mixed, but ot runny. Food Colouring can be added at any time.

Now push your fingers slowly into the bowl until they are submerged. Try to pull them out quickly – you are trapped! Now, slowly pull your fingers out. Experiment by rolling a ball of ooze in your hands and then letting it melt into a liquid and slip through your fingers.

Clean up is easy with soap and water.

Why does it work?

The forces of attraction between the starch molecules and the water vary with the amount of applied pressure. So if you push hard on the Ooze it acts as a solid, and if you push gently it acts as a liquid.

Scientist call Ooze a ‘Non-Newtonian Fluid’ or a ‘colloid’.

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Articles that link to this one:

  1. Photos: BIOS Marine Science Day | Bernews.com | November 22, 2010