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19.05.20

Lava Lamp Science Experiment 

 

What You Need:

  • Flask or bottle
  • Vegetable oil
  • Water
  • Food colouring 
  • Alka-Seltzer tablets

 

Instructions:

  1. Fill the flask most of the way with vegetable oil.
  2. Fill the rest of the flask with water. The water will sink to the bottom under the oil.
  3. Add a few drops of food colouring; your choice of colour. The food colouring is water-based, so it will also sink and colour the water that is now at the bottom of the flask.
  4. Break an alka-seltzer tablet into a few small pieces, and drop them in the flask one at a time.
  5. Watch your lava lamp erupt into activity! As the reaction slows down, simply add more alka-seltzer.

21.5.20

Make a Parachute 

 

What you will need:

  • A plastic bag or light material
  • Scissors
  • String
  • A small object to act as the weight, a little action figure would be perfect

 

Instructions:

  1. Cut out a large square from your plastic bag or material.
  2. Trim the edges so it looks like an octagon (an eight-sided shape).
  3. Cut a small whole near the edge of each side.
  4. Attach 8 pieces of string of the same length to each of the holes.
  5. Tie the pieces of string to the object you are using as a weight.
  6. Use a chair or find a high spot to drop your parachute and test how well it worked, remember that you want it to drop as slow as possible.

 

Can you discuss what materials would work well and what materials might not work well for your parachute? If it does not work - why do you think it might not have worked? 

 

If you wanted more of a challenge, maybe you could try to make a parachute to keep an egg safe? Could end up messy!! smiley

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