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Topics  > Biology  > Botany
Do plants grown taller hydroponically or in soil?
The purpose of this experiment was to find out if radishes grow taller and have more leaves if grown hydroponically using the water culture method and grown hydroponically using the flood and drain method, or if grown "conventionally" in potting soil.
Difficulty: Elementary school
Does a pineapple grow best in sand, soil or water?
The purpose of this experiment was to determine if a pineapple (Ananus comosus) could be regenerated from its crown more effectively in rich soil, sand, or water.
Difficulty: Elementary school
Does classical music help plants grow?
My hypothesis is that classical music will help the plants to grow. I also believe that the plants that listen to country will have their growth stunted.
Difficulty: Middle school
Does gravity affect the direction in which plants grow?
If you've ever planted seeds in the ground, perhaps you have wondered just how do they know which way to grow. How do the roots know to grow down and how do the stems and leaves know to grow up?
Difficulty: Elementary school
Does salt or sugar affect the growth of alfalfa seeds?
The purpose of this experiment was to determine what substances, like salt and sugar, when dissolved in water, will affect the growth of alfalfa seeds. I hope to see which substances have the greatest effect.
Difficulty: Elementary school
Does temperature affect the rate at which seeds sprout?
My hypothesis is that the plant with the soil temperature normal will sprout faster then the plant with the soil temperature higher and lower.
Difficulty: Elementary school
Does the size of kidney bean seeds affect the speed and success rate of germination?
This experimentís purpose is to determine whether the sizes of kidney bean seeds affect the speed and percentage of germination. My hypothesis is that the bigger seeds will have a higher percentage rate.
Difficulty: Elementary school
Earthworms and plant growth
This experiment was conducted to determine how the presence of earthworms in soil can affect plant growth. The experiment was done by comparing the germination and growth of tomato, green beans and radish plants in soil samples that contiained earthworms, with those that did not contain any earthworms.
Difficulty: Middle school
Effect of caffeine on plant growth
This science fair project was performed to find out the effect on plant growth of adding caffeine to the soil. The experiment was done by using mung bean plants and watering them daily with water, water mixed with caffeine and with a coffee mixture.
Difficulty: Middle school
Effect of electricity on plant growth
This science fair project was conducted to find out how electricity affects the growth of plants. The experiment was done by supplying DC 9V to the soil containing radish seeds and observing the rate of plant growth.
Difficulty: High school
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