This document summarizes an experiment on plant tropisms conducted by Irbin Victorino and Rudy Grijalva. They hypothesized that bean seeds planted horizontally and vertically would grow in different directions due to water and light stimuli. Their independent variable was the orientation of the bean seeds, and the dependent variable was the direction of plant growth. They observed that the plants grew towards light and that the roots grew downward in search of water, supporting the hypothesis that plants exhibit tropisms in response to environmental stimuli.

1. Tropisms
5th period 5th science
Irbin Victorino&Rudy Grijalva

2. Research 1
• http://www.kidsgardening.com/onlinecourse/
PartI17.htm
• Plants have the ability to detect light and grow
in the direction that the light is coming from.
This interactive tutorial is about the experiment
that found the hormone that is responsible for
this

3. Research 2
• http://users.rcn.com/
jkimball.ma.ultranet/BiologyPages/
T/Tropisms.html
• A tropism is a growth movement
whose direction is determined by the
direction from which the stimulus
strikes the plant.

4. Research 3
• http://www.essortment.com/all/
tropismwhatpla_rfjq.htm
• What is tropism? There growth responses that
result in curvature of plant organs towards or
away from stimuli due to different rates of
elongation.
• The turning of all or parts of an organism in a
particular direction in response

5. HYPOTHESIS 1
• If we plant a seed horizontal and
vertical then then the root will grow
and then stem will grow because
water will make it grow by
horizontal and vertical will make
them both grow.

6. HYPOTHESIS 2
• There growth responses that result
in curvature of plant organs towards
or away from stimuli due to
different rates of elongation.

7. Variables
• Independent variable(doesn’t
change in experiment)
• Bean seed water same environment
(light/temperature
• Dependent variable(result that
changes in experiment usually what
we are testing
• direction of plants growth

8. Experiment
• To test our hypothesis we water them put
them in the sun. Also the plant changes
direction to the sun and thats how it will grow.
The turning of all or parts of an organism in a
particular direction in response. A tropism is a
growth movement which direction is
determined by the direction from which the
stimulus strikes the plant. Plants have the
ability to detect light and grow in the direction
that the light.

9. DATA
• The first picture is when the
seed is getting out.
• The third picture is when the
seed is going and the root are
down.
• The third picture is when it
has more root so it can get
water
• the last picture is when the
leaf is showing and it bigger it
should grow bigger by the
light and water.

10. Results From Data