David enjoys computer programming, practicing hockey, and playing the piano. He'd like to become a biologist someday because he has "always been interested in life."
While on a walk with his parents on a trail through a nearby park, David noticed that parasitic vines were growing on many of the park's trees. He wondered whether the vines were mostly native or invasive species. David hypothesized that invasive species are more likely than native species to grow on the side of the trail bordering a residential area.
David learned to identify the park's common vine species, and then surveyed each side of the trail. He found that two out of the trail's three most common parasitic vines are invasive species. He found that one of these species, English ivy, was significantly higher on the side of the trail that borders a residential area than on the trail's other side.