Page 2 - FLOWERING AND NON FLOWERING PLANTS

Faruk and Ali used a sound level meter to measure the volume of different sounds.
They held the sound level meter exactly the same distance away from each source of sound.
These are their measurements of the volume of each sound:
Clapping hands: 75dB
Blowing a whistle: 80dB
Slamming a door shut: 90dB
Class talking: 65dB

1 Identify the control, the independent and the dependent variables in this investigation.

___________________________________________________________________________
__________________________________________________________________________

___________________________________________________________________________
__________________________________________________________________________

___________________________________________________________________________

2 Describe one way in which the boys could make the test fair.

___________________________________________________________________________
__________________________________________________________________________

___________________________________________________________________________
__________________________________________________________________________

3 Record the results by completing the bar chart below.