Identify independent (underline it) and dependent (circle it) variables in the hypotheses.
1. Tree rings will be larger during years with more rain.
The length of the rings DEPENDS on the amount of rain
2. Shorter muscles are stronger than longer muscles.
The strength of the muscles DEPENDS on the length
3. Bees are more attracted to larger flowers.
Bees being more attracted to certain flowers DEPENDS on the size of the flower – the bigger the better!
4. Holding your breath increases your heart rate.
Your heart rate DEPENDS on what you are doing – (i.e. holding your breath)
5. Increasing the amount of sunlight a plant receives increases the amount of sugar they produce.
The amount of sugar a plant produces DEPENDS on the amount of sunlight the plant gets