Plant Physiology
Science Fair Projects
Ideas and Sample Projects by Grade Level

Home Experiments Photosynthesis Warning!
Primary School - Grades K-3
P=Project   E=Experiment
The western red lily and its adaptations for survival in its habitat. [P]
Find out how flowers drink water. [P]
Capillary Action of Water in Plants [E]
How Many Seeds Do Different Types of Fruit Produce? [E]
What is transpiration? [P]
What side of a plant leaf takes in carbon dioxide? (what is stomata?) [E] [P]
Elementary School - Grades 4-6
P=Project   E=Experiment
Using Plants to Determine Direction [E]
Find out if plants really absorb water by osmotic pressure. [P]
Shoots: How do Mint Plants Branch to Form New Stems? [E]
Do Potatoes Regulate the Formation of New Roots? [E]
Can roots hold soil together? Will roots always grow towards water? Will roots always point down? [P]
At What Pressure Do Different Types of Nuts Crack? [P]
Separate the colors of a green leaf using chromatography [E]
Exploring the relationship (pollination) between Lesser Dawn Bats (Eonycteris spelaea) and durian fruit [E] [P]
What is Transpiration? [E]
What insect makes a Venus fly trap grow the largest? [E] [P]
Middle School - Grades 7-9
P=Project   E=Experiment
Investigating the Accuracy of the Method Foresters Use to Estimate the Radial Growth Rate of Trees [E]
Coastal Pines: Ability of Needles to Condense Moisture [E]
The Correlation between the Aging in a Banana and the Amount of Potassium It Contains [E]
Find out if size and mass affect the growth of a bean plant. [E]
Is green the only color in a leaf? [E]
Do plants lose water through their leaves? [E]
Can water travel through plant stems? [E]
How Does the Size of a Pumpkin Affect the Number of Seeds It Produces? [E]
Investigate The Venus Fly Trap - an incredible plant that eats insects and therefore it is carnivorous. [E] [P]
Will Nepenthes (pitcher plant) extracts contain enzymes that digest insect proteins? [E] [P]
Find the percent variation of water storage among different succulent species. [E]
Verify that an electrical potential is generated within the petioles when the Mimosa Pudica leaves are physically stimulated. [E]
Investigate whether the pigments in leaves that produced their autumn color are present while the leaves were still green. [E]

Investigate Photoperiodism in Plants [E]
Does Greater Leaf Diameter Increase Transpiration Rate of plants? [E]
1. Determine whether plants can survive in a simulated Martian-like environment.
2. Determine whether plants can change the atmosphere from carbon dioxide to oxygen. [E]
Find out how temperature affects a plant's ability to transport nutrients. [E]
Is green the only color in a leaf? [P]
Can a plant grow from just the top of a carrot? [P]
Can I predict how many sections are in a citrus fruit? [P]
The effect of bean mass on plant height [E]
Compare the rate of dehydration between different fruits [P]
Does the size of a lemon affect the number of seeds it has? [E]
Are there differences in leaf pigments and starch content of healthy and dying leaves? [E]
How does a fruit's internal ethanol levels affect external rind stress? [E]
The effect of the number of stomata on a leaf's surface on the volume of water transpiration [E] [E]
Can Venus flytrap learn? [E] [E]
High School - Grades 10-12
P=Project   E=Experiment
Plant Communication Experimentation [E]
The Effect of Light Exposure on Circumnutation Size in Plants [E]
Plant Species Capacity for Oxygen Production and Ability to Block out UV Radiation [E]
The Basalt Dependency of the Brodiaea santarosae [E]
How Do Plants Defend Themselves? [E]
The Effects of Temperature on the Xylem of Tomato Plants [E]
Determine whether the bioaccumulation of perchlorate and nitrate is more substantial in the outer leaves of a romaine lettuce when compared with the inner leaves. [E]
1. What happens to pigment as leaves change color with seasons? 2. Why are two leaves of the same tree different in color intensity? 3. Does the temperature of a refrigerator have an effect on a plants pigment composition? 4 and 5. Compared different, yet similarly colored parts of the plant to determine whether or not the coloring pigment was the same. [E]
Repeat Charles Darwin's experiments with orchids [E] [E]
Predict whether self-pollination or cross-pollination with another plant with the same or different colored flowers will produce the most seeds. [E] [E]
A taxonomic reassessment of the orders ectocarpales and scytosiphonales based on ribosomal small subunit DNA sequences [E]
Effects of Metabolites Produced by Cladosporium species on Bean and Lettuce Plants [E]
Does Bean Mass Affect Plant Height? [E]
Determine whether the growth rate of the plants will be affected negatively by an increase in transpiration rate due to high winds. [E]
Circadian rhythms in Russian giant sunflowers [P]
Will hyperbarics (pressure) effectively increase the development of the red kidney bean? [E]
Create a field guide of local plants [E]
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Botany Project Ideas
Botany Topics Related Subjects
Seeds & Germination
Soils & Hydroponics
Soil Organisms
Colors in Botany
Weather in Botany
Plant Irrigation
Plant Nutrition
Plant Hormones
Plant Pesticides
UV Radiation Effects
Organic Agriculture
Genetically Modified Food
Plant Pollutants
Plant Cultivation
Plant Physiology
Plant Genetics
Plant Disease
Medicinal Plants
Acids in Botany
Salt & Sugar in Botany
Sun & Light
Environmental Sciences

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Last updated: September 2016
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