The hypothesis is that the stomata density in pine tree leaves taken from locations with a higher traffic flow is lower.

You will select 15 pine trees at locations with different concentrations of automobile traffic, and count the number of vehicles that pass by each location. You will then collect samples of 2 leave clusters from each of the 15 pine trees, and count the number of stomata on the leaves under a microscope.

You will need 15 pine trees at locations with different concentrations of automobile traffic, 3 bottles of clear nail polish, a roll of clear cellophane tape, 15 glass slides, a microscope, 15 plastic bags, a black marker pen, a car and a driver, and GPS (global positioning system) equipment or a good map.

The results showed that the greater the concentration of traffic where the sample leaves were collected, the lesser the amount of stomata found on the sample leaves.

This science project is interesting because it shows how the environment can affect the number of stomata on a plant.

Consider repeating this science fair project by taking leaf samples from different types of trees, or by measuring the stomata density of leaves from trees in different climates.

Hey there! Here are some awesome videos about this science project that we think you'll really like. They're not only super fun, but they'll also help you learn more about the science behind the project. So sit back, relax, and get ready to have some fun!!