To determine whether or not different detergents affect the growth and health of plants and if they do, to measure in what waysthe plants have been affected.
* 5 small, inexpensive and separately potted plants
* 4 different types of detergents such as laundrysoap, dish soap, hand soap and bath soap
* 1-2 gallons of distilled water
* Measuring cup
* 1 teaspoon
* Journal or notebook* Space for the plants that includes enough sunshine for them to continue the process of photosynthesis
* 1. Carefully inspect the plants tomake sure they are healthy and are all relatively faring the same. Your experiment will not be accurate if one plant is more withered than another.
* 2. Pickone plant to be your control – throughout the experiment, it will be watered only with distilled water and no detergents will be used.
* 3. Label each plantso you will know which detergent is being used with which plant and which one your control is.
* 4. You will need to water each plant with ¼ cup of watereach day. You do not want to use too much if the plants are small as you may end up overwatering them.
* 5. Prepare the detergent solutions for the plants bymixing 1 teaspoon of each detergent with the ¼ cup of water. Water each plant at the same time every day, watering the experimental plants with their respectivedetergent solutions and the control plant with distilled water only.
* 6. Repeat watering with the detergent mixtures and distilled water for seven days.