Monday, 2 September 2013

Water Rockets Fly High

Agenda:

1) Scribe Post 
2)How to study for the test?-Quizlet Cards
3) Power Generation
a) Last class expert collaboration
b) What are renewable vs. non-renewable resources
4) -Investigation
 How does the number of pumps affect how high a water rocket goes 



How to study for the test: 

The best tools to use are: cards and scatter
                                                                       Card
  • One the activity cards, you see the question and see the answer on the other side of the card
  • If you don't know the answer to a card "star" it and review it over after you did all cards
  • A & B questions are harder, C & D questions are a less challenging                                                                                               Scatter
  • Match the question with the answer
  • It's timed, try to beat the highscore and get to #1 position 



Power Generation:


                                                              
      Renewable sources
  • air
  • water
  • sun (never runs out)
  • fishes
  • trees                                                
       Non- renewable
  • fossil Fuels
  • might not be enough oil/gas for the next century
  • coal
  • oil
  • burning fossil fuels make lots of pollution
  • contributes to global warming
  • 60% of electricity is fossil fuels

                              Investigation 

How does the number of pumps affect how high a water rocket goes?

Independent variable: Change the number of pumps
Dependent: How how the water goes
Constant: Amount of water
Hypothesis: If the number of pumps is increased, the rocket height will increase because more elastic energy will be converted to kinetic energy of the rocket.  The more kinetic energy the rocket has, the higher is will go.


Materials & Prediction:

Equipment

  • rocket, pump
  • funnel to put the water
  • graduated/measuring cylinder
  • water (from the taps)
  • 2 meter sticks
  • optional (video camera)


Procedure/Method:

  1. Fill the rocket about halfway with water.  For the first trial, mark the line using a permanent marker and fill it up to the same level every time.
  2. Position the rocket vertically close to the ground.
  3. Position two meter sticks stacked vertically above each other.
  4. Pump the rocket 6 times.
  5. Pull the trigger on the rocket and launch it vertically.
  6. Observe and estimate how high the rocket travelled in 10s of cms.
  7. Repeat each experiment twice and take the average.
  8. Repeat steps 1-7 for different numbers of pumps (6,10,14,18,22) times.
A picture and a video

http://www.youtube.com/watch?v=zXUgygxJc-Q&feature=youtu.be



Preparing for rocket to be launched






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