Omg! soo stressed- cant decide which one to choose!!! i'm allowed to change my idea even after i submit the first blog, rite? as long as i let miss (hi ms zhang!) know? ok...
i cant decide between:
1. the effect gravity has on plant roots. This will be done by turning the plant upside down at a certain stage (early, but not too early) of its development.
2. Observing egg buoyancy in different densities of water by adding salt etc.
3. Observing heart rates of boys and girls (in same age group) to find out if there is a difference.
4. The effect heat has on rubber bands of different densities and original elasticities- see choices for methods below)
5. How well soil with different salinity levels conduct electricity, by adding table salt and using something metal a certain distance apart in the soil to measure how well it conducts. (this one sounds kind of hard)

Well, there are my final choices- i haven't exactly narrowed them down a lot, have i? anyway, the independent and dependent variables are listed under each heading below.