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Questions
- What happened to the level of soil nutrients over time?
(The nutrient level dropped as the experiment progressed.Students
should be able to provide evidence through their data)
- What might have caused the observed change in nutrients? (The
plant removed the nutrients from the soil and incorporated these
essential chemicals into new plant tissue.)
- Was there a difference in the nutrient level from samples taken
from between the root system and those taken outside the root
system? Explain.
(Accept all reasonable replies such as after the first two-week
period there was a noticeable difference. After four weeks the
difference was less obvious. The nutrients were quickly drained
from areas in contact with the growing rootlet system. As the
plant grew, the roots spread into the soil. In addition, watering
the plants transported nutrients to the regions of the soil that
were in contact with roots.)
The
activities in this guide were contributed by Michael DiSpezio, a
Massachusetts-based science writer and author of "Critical Thinking
Puzzles" and "Awesome Experiments in Light & Sound" (Sterling Publishing
Co., NY).
Academic Advisors for this Guide:
Corrine Lowen, Science Department, Wayland Public Schools, Wayland,
MA
Suzanne Panico, Science Teacher Mentor, Cambridge Public Schools,
Cambridge, MA
Anne E. Jones, Science Department, Wayland Middle School, Wayland,
MA
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