The importance of seeds
Describe the structure of a seed
Task 21
After fertilisation:
The ovule will develop into a X.
The ovary will develop into a X.
Use this video to help you label the seed diagram:
http://www.youtube.com/watch?v=G2gwDgIhxCw
Describe the structure of a seed
Task 21
After fertilisation:
The ovule will develop into a X.
The ovary will develop into a X.
Use this video to help you label the seed diagram:
http://www.youtube.com/watch?v=G2gwDgIhxCw
1 X
2 X
3 X
4 X
5 X
Write the function of the different parts:
Testa: X
Cotyledon: X
Micropyle: X
Radicle: X
Plumule: X
Together, the radicle and plumule are the baby plant. This is called the X
Task 22
You will dissect a seed. Take a photo and paste it in here.
Label the different parts.
Place a few drops of iodine onto the cotyledon.
What happens? X
What would you find in the cotyledon? X
Take a photo and paste it in here
Why would you find this substance in the cotyledon? X
SciPad Pg 140
Explain the need for seed dispersal
Task 23
What is seed dispersal? X
Use this animation to describe how the five most important methods of seed dispersal work and give an example for each method.
http://www.bgfl.org/custom/resources_ftp/client_ftp/ks2/science/plants/index.htm
Water: X and Example:
Edible fruit: X and Example:
Wind: X and Example:
Hooks: X and Example:
Explosion: X and Example:
It is important for the seed to be dispersed away from the parent plant to reduce the amount of competition. Name three things that individual plants would compete for:
X
X
X
SciPad Pg 141
Explain the requirements for germination of seeds
When the seed starts to grow into a new plant it is called germination.
Task 24
You will do an experiment over two weeks to observe the germination of some seeds. Take photos of your seeds and paste into the table.
Day 0
Day 2
Day 4
Day 6
Day 8
Day 10
Day 12
Day 14
2 X
3 X
4 X
5 X
Write the function of the different parts:
Testa: X
Cotyledon: X
Micropyle: X
Radicle: X
Plumule: X
Together, the radicle and plumule are the baby plant. This is called the X
Task 22
You will dissect a seed. Take a photo and paste it in here.
Label the different parts.
Place a few drops of iodine onto the cotyledon.
What happens? X
What would you find in the cotyledon? X
Take a photo and paste it in here
Why would you find this substance in the cotyledon? X
SciPad Pg 140
Explain the need for seed dispersal
Task 23
What is seed dispersal? X
Use this animation to describe how the five most important methods of seed dispersal work and give an example for each method.
http://www.bgfl.org/custom/resources_ftp/client_ftp/ks2/science/plants/index.htm
Water: X and Example:
Edible fruit: X and Example:
Wind: X and Example:
Hooks: X and Example:
Explosion: X and Example:
It is important for the seed to be dispersed away from the parent plant to reduce the amount of competition. Name three things that individual plants would compete for:
X
X
X
SciPad Pg 141
Explain the requirements for germination of seeds
When the seed starts to grow into a new plant it is called germination.
Task 24
You will do an experiment over two weeks to observe the germination of some seeds. Take photos of your seeds and paste into the table.
Day 0
Day 2
Day 4
Day 6
Day 8
Day 10
Day 12
Day 14
Task 25
Water is absorbed through the m and makes the seed swell. The t splits and the r emerges and grows downwards as it will become the root. The p then starts to grow upwards and will become the s. G is complete when the seedling produces leaves and can make its own food.
Why does the root form first? X
A seed is dormant and needs the right conditions to germinate (the WOW factors!). Name these factors and explain why the seed needs these conditions in order to germinate.
W
O
W
SciPad Pg 142-143
Task 26
Put seeds into four petri dishes. Take photos of the petri dishes after 8 days
Petri dish 1 (Incubator at 25 degrees, watered)
Petri dish 2 (Incubator at 25 degrees, not watered)
Petri dish 3 (Fridge, watered)
Petri dish 4 (fridge, not watered)
Explain why the seeds on each petri dish did/did not germinate
1:
2:
3:
4:
Do seeds need light to germinate? X
How come the seed doesn’t need to do photosynthesis? X
Water is absorbed through the m and makes the seed swell. The t splits and the r emerges and grows downwards as it will become the root. The p then starts to grow upwards and will become the s. G is complete when the seedling produces leaves and can make its own food.
Why does the root form first? X
A seed is dormant and needs the right conditions to germinate (the WOW factors!). Name these factors and explain why the seed needs these conditions in order to germinate.
W
O
W
SciPad Pg 142-143
Task 26
Put seeds into four petri dishes. Take photos of the petri dishes after 8 days
Petri dish 1 (Incubator at 25 degrees, watered)
Petri dish 2 (Incubator at 25 degrees, not watered)
Petri dish 3 (Fridge, watered)
Petri dish 4 (fridge, not watered)
Explain why the seeds on each petri dish did/did not germinate
1:
2:
3:
4:
Do seeds need light to germinate? X
How come the seed doesn’t need to do photosynthesis? X