soo... i'm like really stuck deciding between number 2 and 3. well anyway. i'll make my final decision when i come home tomorrow! (which will be at like 10. x-x;) so, the variables.
if i did the number 2 experiment with the effect of different types of tea on plant growth. the variables would be: (btw i'm not sure if they're right. please correct me if they're not)
independent - the weather on each day
dependent - growth rate of plants
controlled - amount of tea put into plant each day
if i did the experiment number 3 the variables would be:
independent - the weather on each day
dependent - growth rate of plant
controlled - the wavelength of light that is let in
and yeah. i dunno if those are right. please correct me if they're not. ^^
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