Scientific Method


Independant Variable
Dependant Variable
Constants
Hypothesis/Notes

1
Temperature of the water
DO Levels in the water
water type/amount, same oxygen test, temperature for each variable remains constant
if the weather remains cool the Do level in the water will stay acceptable

2
pH of the water
Shrimp location
Amount of shrimp, water source, quality, and temperature, time
If the shrimp swim toward the KOH side, then brine shrimp prefer water with a higher pH.

3
number of seeds per pot
biomass
amount of dirt, water, sunlight, and time
If more seed are planted, then the biomass will be lower

4
Concentration of copper sulfate (%)
Survival rate of shrimp
10 brine shrimp in each petry dish, 24 and 48 hour periods
If a 1% concentration of copper sulfate is used, then 50% of the brine shrimp will die within 48 hours

5
1.What type of herbicide
2. How long plants were exposed to herbicides
Death rate of weeds
Water, Sunlight, Soil
1. If herbicide 1 is used, it will kill more weeds than herbicides 2,3,4, and 5
2. If the weeds are exposed to herbicides for a longer period of time, then more of them will die.