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High School, Experiment in Plant Biology Science Projects (16 results)

Explore the amazing world of plants--what makes them grow and how they help us. Grow your own plants under different conditions, find out what makes up plants by extracting pigments from leaves, or do a hands-on experiment with fruits.

Monitor Your Plants with a Soil Moisture Sensor
Science Fair Project Idea
Scientific Method
Do you or your family have a lawn, garden, or potted plants that you water regularly? Irrigation—or the artificial application of water to plants and landscaping—accounts for over two-thirds of the world's freshwater consumption (U.S. Geological Survey, 2016)! While that total includes farms, in the United States landscape irrigation still accounts for almost one-third of residential water use. As much as half of that water is wasted due to inefficient watering methods (WaterSense,… Read more
Exploring the Chemistry of Red Flower Pigments
Science Fair Project Idea
Scientific Method
Are all reds the same? Find out in this science fair project! Investigate if the pigments in one type of red flower are different from those in another type of red flower. Flowers contain an assortment of amazing chemicals that produce color. In this plant biology project, you will analyze the colored pigments in different plants' red flower petals using paper chromatography, and compare the pigments in the different flowers. Read more
Plants on the Move! Experiments with Phototropism
Science Fair Project Idea
Scientific Method
Plants move—not very quickly compared to animals, but they do move. Their roots grow downward in response to gravity, and their stems grow upward toward the Sun. In this plant biology science fair project, you will investigate how young plants respond through movement to light. Read more
How Vines Find Their Spines: Thigmotropism in Morning Glory Tendrils
Science Fair Project Idea
Scientific Method
We tend to think of plants as immobile, but the tendrils of a vine, such as the morning glory, actually move in response to touch. Tendrils wrap around structures, which give the plant something to grow on. In this science fair project, you will investigate how plant tendrils respond to touch stimuli. Read more
Growing Great Gardens: Using Human Urine as a Fertilizer
Science Fair Project Idea
Scientific Method
Every day farmers around the world apply commercial fertilizer to their fruits and vegetables to improve plant health and yield. But applying commercial fertilizer is expensive and not economically possible for some farmers in developing countries. What if they could find a way to fertilize plants cheaply? It turns out that human urine is rich in the nutrients that plants need to grow. Could urine serve as a fertilizer substitute? Find out for yourself in this plant growth science project. Read more
Turn Plants into Biofuel with the Power of Enzymes
Science Fair Project Idea
Scientific Method
Are biofuels the wave of the future? People often talk about these plant-derived fuels as a way to someday cut down on our dependency on non-renewable carbon-based fuels, like gasoline. Ethanol (a type of alcohol) is a common biofuel used today. In the United States, ethanol is a common biofuel additive to normal gasoline. In fact, some states mandate that when you fill up your gas tank, 10 percent of the total fuel volume be made of ethanol. Brazil, the world's second largest user of… Read more
Harmful or Helpful? The Effects of Hydrogen Peroxide on the Roots of Plant Cuttings & on Seed Germination
Science Fair Project Idea
Scientific Method
Hydrogen peroxide (often used as a disinfectant) has also been approved for use in pesticides. This science fair project investigates whether hydrogen peroxide has any effects on seed germination or on roots of plant cuttings. Read more
Rad Radishes: Effects of Irradiation on Seed Germination
Science Fair Project Idea
Scientific Method
DNA is the "instruction manual" for the successful growth of a living thing, from a single cell to a mature adult. When the DNA of an organism is somehow damaged, it can have an impact on the organism's development over time. In this plant science fair project, you will track how irradiation (exposure to radiation) of radish seeds affects germination (sprouting of a seedling from a seed). Read more
Experiment with Factors that Affect Roundup® Weed Killer
Science Fair Project Idea
Scientific Method
Farmers are constantly battling various types of weeds that compete with the crops they are trying to grow. One of the tools they use to combat unwanted plants is a chemical called glyphosate. Glyphosate is the active ingredient in Roundup, a widely used weed killer. In this plant biology science fair project, you will explore the factors that affect the activity of glyphosate. Read more
A Toxic Test: Can Plants Be Genetically Resistant to Heavy Metals?
Science Fair Project Idea
Scientific Method
Have you ever wondered why a plant that grows well in one environment may not survive in a different environment? For example, plants that grow well in a wet jungle would probably not do so well in a dry desert, lacking enough water. This is because plants have adapted to their specific environment. Some plants have even adapted to tolerate chemicals that would usually be toxic, such as various heavy metals. In this plant biology science project, you will investigate whether different varieties… Read more
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