Do Sunflowers have a faster grow faster when watered with clean drinking water from the tap or with rain water collected outside? Hypothesis
If both plants receive the same amount of water each day, then the plants receiving rain water would have a faster growth rate. This is rain water has more nutrients in it then regular drinking water. These nutrients would make the sunflowers grow at a faster rate than the sunflowers with regular water. Variables
Independent: the type of water, either clean drinking water from the tap. Dependent: the growth of the sunflower.
Control: Each plant will receive the same amount of water as any other. Also the plant will receive the same amount of sunlight as each other, lastly the plants will be measured and water at the same time every day. Control of Variables
The way that the variables will be controlled are the plants will receive the same amount of water (¼ cup daily). This is to insure that they receive a proper amount for the plant to survive. The amount of light that the plants will obtain will be from the sun. The plants are to be placed in the same window to receive the same amount of lights (preferably a bay window). The plants will be measured the same time daily and also watered the same time daily so that there is no confusion that the plants could have had more growth time one day. Also, the plants will be measured with the same ruler every time they are measured to ensure the measurements are equal. Materials
The materials needed for this biology lab are:
* 10 sunflower seeds per type of water (total of 20)
* 20 separate planters
* A ruler (for measurement)
* Two ¼ cup for watering the plants
* Source of rain water
* Source of clan drinking water
* Light source, the sun
| Ruler¼ Cup of waterSunflowerSunflower seedSoilPlanter|
For starting the lab first place the even amount of soil into the 20 planters....