What two things could effect the height or length of a seedling?
light intensity
gravity
1 of 25
What is the IV?
DV?
CV?
Light intensity
height
volume of water, type of seed
2 of 25
EFFECT OF LIGHT INTENSITY ON SEEDLING HEIGHT
-----------------------------
Firstly, place _____ ____ in _ petri dishes and ____ them with equal ______ of water?
place cotton wool in 3 petri dishes and soak them with equal volumes of water
3 of 25
Place __ ______ seeds into each dish?
10 mustard seeds
4 of 25
Then leave in a ____ place for it to______?
warm place for it to germinate
5 of 25
Then water them for how long?
everyday
6 of 25
With the same?
volume of water
7 of 25
After a few days the seeds?
will germinate
8 of 25
Then ensure that the same number of ______ are in each ______ ____?
seedlings
petri dish
9 of 25
This is because some seeds?
may not germinate
10 of 25
Then measure?
the height of each seedling
11 of 25
Using?
a ruler
12 of 25
We must hold?
the seedling straight
13 of 25
But be careful not to?
damage them
14 of 25
Then place each petri dish where?
in full sunlight
in partial sunlight
in no light
15 of 25
Then measure their heights for?
5 consecutive days
16 of 25
Then calculate?
a mean height for each day
17 of 25
RESULTS
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The seedlings in full or partial light would have what?
grown towards sunlight
18 of 25
This is due to?
phototropism
19 of 25
In the dark what has happened?
the seedlings have grown the longest
20 of 25
This is because seeds usually germinate?
underground
21 of 25
And grow rapidly?
to reach light
22 of 25
The leaves will also be ____ and ____?
small and yellow
23 of 25
This is because all of their _____ ____ have been used up?
energy stores
24 of 25
And they cannot _______ in the dark?
photosynthesis
25 of 25
Other cards in this set
Card 2
Front
What is the IV?
DV?
CV?
Back
Light intensity
height
volume of water, type of seed
Card 3
Front
EFFECT OF LIGHT INTENSITY ON SEEDLING HEIGHT
-----------------------------
Firstly, place _____ ____ in _ petri dishes and ____ them with equal ______ of water?
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