Putting a skud missile in the tank at the same time
For instance, if you wanted to experiment on plant a, plant b, and plant c. You would put plant c to one side, treat it like a normal plant (water, feed, etc.) and call that the control. You could then experiment on plant a and plant b - feeding them differing fertilisers, allowing pests to attack the plants, and so on. At the end of the experiment, you could compare the growth of plant a and plant b to the control plant c. Though plants are mentioned above, the principle relates to any experiment - you need a control to compare against the end results of the experiment.
no cause salt dries up the water in the plant which makes the plant die
Not. A controlled experiment is one where there is a control - in this case what is needed is a plant which receives no extra fertilizer or water.
In general, heat waves do not have any effect on the biomass of a plant in an experiment. The heated water or water from a microwave also does not affect the plant.
Limitations in plant experiment entail the lack of one or all of the following: light, water, temperature and nutrients
When water is osmotically removed from a plant bad things could happen. When the plant is dehydrated i could die.
it could cause so many decease as the water is polluted
If you try an experiment, it wont die.With soda it wouldn't grow with salt it will grow.
Wilting
Pouring lemonade on a plant can disrupt the soil pH balance and cause damage to the roots. The sugar content in the lemonade can attract pests and promote mold growth. It is best to water plants with plain water to maintain their health.
A controlled experiment is an experiment in which all factors are controlled except for the one variable you will be altering. If you were performing a controlled experiment on the effects of fertilizer on plant growth, for example, you have to control plant variety, exposure to sunlight, soil type and water ration. The only thing you would change is the fertilizer used on each plant.
In the rat treading water experiment, researchers found that rats could tread water for an extended period of time, showing their ability to swim and stay afloat. This experiment demonstrated the rats' physical endurance and adaptability in water.