Seed Germination

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Aim:

To test which condition (external or internal) best suits the growth of seed germination

Hypothesis:

I would assume that the seeds that were placed outside in their natural environment would have a better growth pattern than that of the internally grown one due to the fact that its exposure to nature's day/night length, natural sunlight rain and temperature are the necessary elements for successful seed germination.

Apparatus:

4 Containers (preferably 0mm x 200mm x 100mm)

Small bag of potting mix

Packet of pea seeds

Ruler for measuring seed growth

Watering can

Method:

(1) Pour potting mix into two exact size containers (filling ¾ of the container)

(2) Place four seeds (25mm deep) in each corner of the containers

(3) Place one container outside in full sunlight and one indoors with no sunlight

(4) Water plants once a day

(5) Record results everyday

(6) After two weeks repeat test to ensure that the results have not altered and to limit any substantial variations in the important elements (e.g. light, temperature and rain) that may cause a different result

Variables:

Dependant variable: Growth of seed

Independent variable: Environment (internal/external)

Controlled variables: Type of seed, size of container, type of container, amount of soil, type of soil, amount of water given to the plant

Diagram:

Results:

Inside trial one

Inside trial two

Seed 1 Seed 2 Seed 3 Seed 4

Day 1 0 0 0 0

Day 2 0 0 0 0

Day 3 0 0 0 0

Day 4 15 0 0 0

Day 5 38 14 9 0

Day 6 66 20 13 0

Day 7 94 46 25 6

Day 8 112 54 30 11

Day 9 121 64 30 13

Day 10 124 73 31 14

Day 11 134 114 32 19

Day 12 145 135 33 28

Day 13 157 139 34 30

Day 14 164 147 35 30

Seed 1 Seed 2 Seed 3 Seed 4

Day 1 0 0 0 0

Day 2 0 0 0 0

Day 3 0 0 0 0

Day 4 13 3 1 0

Day 5 35 15 10 0

Day 6 65 30 17 3

Day 7 90 49 27 12

Day 8 108 61 33 17

Day 9 116 78 39 23

Day 10 121 86 48 27

Day 11 124 116 56 31

Day 12 131 128 64 34

Day 13 143 139 68 39

Day 14 158 155 73 44

Outside trial one

Seed 1 Seed 2 Seed 3 Seed 4

Day 1 0 0 0 0

Day 2 0 0 0 0

Day 3 10 10 8 6

Day 4 11 11 9 7

Day 5 12 12 10 8

Day 6 24 22 19 14

Day 7 25 23 21 20

Day 8 29 26 25 24

Day 9 35 31 28 26

Day 10 36 33 29 26

Day 11 37 35 30 27

Day 12 37 36 31 27

Day 13 38 36 32 27

Day 14 40 38 35 29

Outside trial two

Seed 1 Seed 2 Seed 3 Seed 4

Day 1 0 0 0 0

Day 2 0 0 0 0

Day 3 11 9 8 6

Day 4 12 11 9 7

Day 5 14 13 11 8

Day 6 25 23 20 13

Day 7 28 25 23 19

Day 8 32 29 27 24

Day 9 37 34 30 25

Day 10 39 35 31 26

Day 11 40 35 31 28

Day 12 40 37 34 30

Day 13 41 39 36 31

Day 14 42 41 38 34

Picture taken of internally grown plant on day 7

Picture taken of externally grown plant on day 7

Picture taken of internally gown plant on day 14

Picture taken of externally grown plant on day 14

Discussion:

In the hypothesis leading up to carrying out the experiment I assumed that the seeds that were grown externally would grow more successfully than those which were internally grown due to the fact that its exposure to day/night length, natural sunlight, rain and temperature would play a more significant part to this growth.

However, to my surprise the internal seeds had grown a lot better to that of the outside ones. I again carried out the experiment in order to confirm if the outcomes would change. During my first experiment weather conditions were not all that favourable. Cold cloudy, rainy and windy conditions may have had an impact on the results so it was necessary to see if this changed the results.

After completing the experiment the second time, again the internal seeds had a much better growth pattern then the external seeds.

I concluded that the temperature and light played a significant contribution in this case as the temperature inside remained consistent and warmer...
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