You can have an experiment at home to test sound too!
You Apparatus:
● 6 empty 600ml nestle pure life bottles
● 1 measuring cup
● 1.15L of water
● Funnel
● Marker
The Variables:
Independent Variable:
The amount of water
Dependent Variable:
The change in the pitch(measure it 1-6 where 6 is the lowest and 1 is the highest) 1=very very high, 2=very high, 3=high, 4=low, 5=very low, 6=very very low.
Control Variables:
the bottle: I will make it the same size and same company.
the temperature: I will keep the bottles in the same place and keep the temperature the same.
The Method:
1.Number the bottles 1-6
2. Take bottle 1 and a measuring cup
3. Pour 50ml of water in the bottle
4. Add 125ml of water in bottle 2
5. Add 75ml of water in bottle 3
6. Add 500ml of water in bottle 4
7. Add 250ml of water in bottle 5
8. Add 150ml of water in bottle 6
9. Blow with the same pressure in each
bottle
10. Record the pitch in numbers
11. Repeat step 9 to compare your results.
Have fun with your Experiment at home