Biology Reference
In-Depth Information
3. One of the bowls was placed on top of the magnet.
4. Bowls were placed 10 feet apart under otherwise similar environ-
mental conditions, including light.
5. The seeds were watered for 2 weeks.
6. The number of seedlings was counted at end of the 2-week
experimental period and their heights recorded.
Observations/Data
After 24 hours in the cotton, most of the seeds had opened and had
begun to sprout.
After 2 weeks, 47 of 50 seeds sprouted in the bowl exposed to
magnetism.
After 2 weeks, 43 of 50 seeds sprouted in the bowl not exposed to
magnetism (see Figure 4-9).
The sprouts under the influence of magnetism appeared to be taller
than the sprouts not under the influence of magnetism (by at
least 2-3 cm, as a rough estimate). The actual data are recorded in
math.
sbc.edu/data.html.
E
XERCISE
4-2
When engaged in manual activities, most people favor one hand over
the other. A smaller proportion of the human population is left-handed
FIGURE 4-9.
A photograph of the sprouts in the bowl exposed to magnetism (left) and the bowl not exposed to
magnetism (right) taken 2 weeks after planting the lentil seeds.
