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Tutorial 2

Hypothesis
  • Different sauces added to the dead octopus tentacles will affect the frequency and duration of movement.
Controlled variable:
  • octopus pieces from the same leg
  • same amount of sauce added
  • same temperature
  • same humidity
Independent variable:
  • Different kinds of sauce added to octopus
  • 1. lemon juice
  • 2. soy sauce
  • 3. salt
  • 4. chilli sauce
Dependent variable:
  • The duration that the octopus legs continue to move after sauce is added
Material:
1. Octopus
2. Knife
3. distilled water
4. lemon juice
5. soy sauce
6. Salt
7. chilli sauce
8. 5 plates
9. stop watch
Experiment Procedure:
  1. Clean the plates and knife
  2. Wash the octopus with distilled water
  3. Cut it into small pieces (same length) and put them into four different plates
  4. Until the octopus stop moving, we add those four sauces to the octopus simultaneously
  5. Observe movement of the octopus and start counting how long they move



Reference:
https://www.youtube.com/watch?v=JGPfSSUlReM

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