|
Mustard seeds were germinated in the light and in the dark. After
they had grown for one week, the length of the stem, the size of the leaves and
the colour of the leaves were recorded for ten plants.
|
Plants grown in the Light
Colour of leaves =
GREEN
|
| Plant |
Length of stem (mm) |
Size of leaf (mm) |
| 1 |
28 |
15 |
| 2 |
25 |
13 |
| 3 |
20 |
11 |
| 4 |
17 |
10 |
| 5 |
24 |
14 |
| 6 |
21 |
9 |
| 7 |
15 |
13 |
| 8 |
26 |
12 |
| 9 |
23 |
10 |
| 10 |
19 |
14 |
|
|
Plants grown in the Dark
Colour of leaves =
YELLOW
|
| Plant |
Length of stem (mm) |
Size of leaf (mm) |
| 1 |
75 |
6 |
| 2 |
80 |
6 |
| 3 |
81 |
6 |
| 4 |
89 |
4 |
| 5 |
73 |
5 |
| 6 |
83 |
5 |
| 7 |
68 |
7 |
| 8 |
86 |
6 |
| 9 |
93 |
4 |
| 10 |
89 |
5 |
|
| 1. Calculate
the average length of the stems and the average size of the leaves for
both sets of plants. |
Plants grown in the light
Average length of stems =
Average size of the leaves = |
Plants grown in the dark
Average length of stems =
Average size of the leaves = |
| 2. Why
is it better to measure ten plants from each experiment rather than just
one plant from each? |
|
3. What
do you observe from these results?
Hint: Describe, in your own words, the
differences between the plants grown in the light and the plants grown
in the dark. |
|
4. What
are your conclusions?
Hint: How can you explain these
differences? |
|
| 5. If
you could continue this experiment for another four weeks, what would
you expect to happen to the plants? |
|
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