1. Welcome 1
This is a document to explains the chosen concept to the animator.
This will take you through a 5 section process to provide the necessary details to the animator before starting the animation.
The legend on the left will indicate the current status of the document. The big Black coloured number will denote the current section, the Grey color would denote the completed sections, and the Turquoise color would denote the remaining sections.
The slides having yellow background (like this one) are the 'Instruction slides' 2 3 4 5

2. Sea floor spreading
Seafloor spreading is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge.
Related LOs:
> Prior Viewing: Plate tectonics/Movement
> Future Viewing :
Course Name: Plate Tectonics Level: Under graduation
Author: Arpita Roy
Mentor: Prof. Soumyajit Mukherjee
Title of the concept
*The contents in this ppt are licensed under Creative Commons Attribution-NonCommercial-ShareAlike 2.5 India license

3. Learning objectives 1
After interacting with this Learning Object, the learner will be able to:
Describe the geological phenomena of the Sea floor spreading
Explain continental drift in the theory of plate tectonics 2 3 4 5

4. 1 Master layout or diagram 2 3 4 5
Make a schematic diagram of the concept
Explain the animator about the beginning and ending of the process.
Draw image big enough for explaining.
In the image, identify and label different components of the process/phenomenon. (These are like characters in a film)‏
Illustrate the basic flow of action by using arrows. Use BOLD lines in the diagram (minimum 2pts.)‏
In the slide after that, provide the definitions of ALL the labels used in the diagram
You may have multiple master layouts.
In this case, number the master layout. (e.g. Master layout 1, 2, 3…)‏ 2 3 4 5

5. 1 Master layout 2 3 4 5 Animator should redraw diagrams
Text written in blue colour are the instructions for the animator, would not appear in the final animation
Text written in black colour has to appear in the animation
Green arrows indicate the flow of the phenomenon/process 2 3 4 5

6. Keywords/definitions1
Mid-ocean ridges: These are divergent plate boundaries where oceanic plates move away from each other. The molten material comes to the ocean floor, gets cooled and added to the oceanic plate
Subduction zones (Trenches): Subduction zones are a type of convergent plate boundary where two plates move towards one another. The oceanic plate (denser plate) will go under the continental plate (lighter plate). 2 3 4 5

7. Master layout:1 1 2 3 4
Fig. 1
Convection currents cause the upwelling of molten mantle beneath the mid-oceanic ridge. The basalt lava erupts at the mid-oceanic ridge. This creates new oceanic crust. The mantle material spreads outward in both the directions from the mid-ocean ridge, carrying the oceanic crust along with it. This pushes the older material of oceanic plates below the continental plates. 5

8. 1 Master layout:2 2 3 4 5 Fig. 2a Fig. 2b
Mid-oceanic ridge
Molten material
Fig. 2b
New rock added to each side of the mid-ocean ridge
Ocean floor 2
Axial zone of the ridge 3 4
Convection currents under the lithosphere push new crust that forms away from the mid-oceanic ridge. This means that the oldest oceanic crust lies the farthest from the mid-ocean ridge. The newest oceanic crust is the mid-ocean ridge. 5

9. 3 Stepwise description of process 1 2 4 5
The goal of the document is to provide instructions to an animator who is not a expert.
You have to describe what steps the animator should take to make your concept come alive as a moving visualization.
Use one slide per step. This will ensure clarity of the explanation.
Add a image of the step in the box, and the details in the table below the box.
You can use any images for reference, but mention about it's copyright status
The animator will have to re-draw / re-create the drawings
Add more slides as per the requirement of the animation 2 3 4 5

10. Step 1: Movements of convection current, molten material and plates
Description of the action
Audio narration
Text to be displayed
1) Show the movement of the red colored material by green arrow (as shown circular arrow in the diagram).
2) Show the movement of the oceanic plates on both side of the mid oceanic ridge. (the two plates move away from the mid oceanic ridge, shown here by purple colored arrows).
3) Time duration will be Secs.
Convection currents cause the upwelling of molten mantle beneath mid-oceanic ridge. The basalt lavas erupt at the mid-ocean ridge. This creates new oceanic crust. The mantle material spreads outward in both the directions from the mid-oceanic ridge, carrying the oceanic crust along with it. This pushes the older material of oceanic plates below the continental plates.
Mobile plates
Green colored arrows indicate the movement of convection current and the purple colored arrows indicate the movement of the plates

11. Step 2: Addition of new materials in sea floor spreading
Fig. 2a
Mid-oceanic ridge
Molten material
Fig. 2b
New rock added to each side of the mid-ocean ridge
Ocean floor
Description of the action
Audio narration
Text to be displayed
1) Show Fig. 2a first comes to the screen as a block diagram with labels. Then the movement of convection current should get animated (as shown by green arrows). Then the movement of plates will start ( shown on the upper part of the block diagram by purple colored arrow)
2) Next, the block diagram of Fig. 2b will appear on the screen with labels and all the movements of convection current and oceanic plates moving away from each other at same time. Fig. 2a will be replaced by Fig. 2b
Convection currents under the lithosphere push new crust that forms away from the mid-ocean ridge. This means that the oldest oceanic crust lies the farthest from the mid-ocean ridge. The newest oceanic crust is the mid-ocean ridge.
New material deposits after sea floor spreading
Axial zone of the ridge
Green colored arrows indicate the movement of convection current and the purple colored arrows indicate the movement of the plates

12. 1
Animation design
Please see the design template provided in the next slide.
This is a sample template, and you are free to change as per your design requirements.
Try and rename the tabs / buttons / sections / subsections as shown in the template.
Use ‘callouts’ as shown above to explain the source of content. Ex: If the call out is placed at the Tab 01, and you want the content to be taken from slide 3 of this presentation, then place this callout on the Tab 01, and write ‘Slide 3’ inside the callout. 2 3
Slide 3 4 5

13. Interactivity area Fig. 1 Start Definitions Model 1 Model 2a Model 2b
Summary
Replay
Click on Fig. 1.
Credits

14. Interactivity area Fig. 2a Fig. 2b Mid-oceanic ridge Start Definitions
Molten material
Fig. 2b
New rock added to each side of the mid-ocean ridge
Ocean floor
Start
Definitions
Model 1
Model 2a
Model 2b
Summary
Replay
Click on Fig. 2a
Credits

15. 5 1 2 3 4 Self- Assessment Questionnaire for Learners
APPENDIX 1 1
Self- Assessment Questionnaire for Learners
Please provide a set of questions that a user can answer based on the LO. They can be of the following types:
These questions should be 5 in number and can be of objective type (like MCQ, Match the columns, Yes or No, Sequencing, Odd One Out).
The questions can also be open-ended. The user would be asked to think about the question. The author is requested to provide hints if possible, but a full answer is not necessary.
One can include questions, for which the user will need to interact with the LO (with certain parameters) in order to answer it.
It is better to avoid questions based purely on recall. 2 3 4 5
Fig.1

16. APPENDIX 1
Questionnaire: 1
1) What could be the reason behind the plate movements during sea-floor spreading?
The driving mechanism of these movements could be the convection currents in sub lithospheric mantle
There was some kind of density contrasts
Due to pull apart movement
None of these
2) How does mid oceanic ridge form? (Hint is need here, otherwise students would not be able to understand the right answer)
Hint: 2 3 4
Failed arm 5
Fig.1
Fig. 1
Fig. 3
Fig. 2

17. 1
Hint: Break up of the continent into 3 parts (from Fig. A to B) Break up of the continent into two masses with ridge boundary, formation of failed arm.]
a) Mid oceanic ridge gradually goes from Fig. 2 then Fig. 1 and then Fig. 3
b) Mid oceanic ridge gradually goes from Fig. 3, Fig. 2 and Fig . 1
c) Mid oceanic ridge gradually goes from Fig.1, Fig. 2, Fig. 3
d) None of these
3) The topography and structure of the axial zone of ridges depends on
The thickness of the bocks separated by mid oceanic ridge
The spreading rate of the blocks
Depends on the volcanic activity 2 3 4 5

18. Links for further reading
APPENDIX 2
Links for further reading
In the next slide, provide some reference reading material for the users.
It could be books, reference publications, or website URLs.

19. Links for further reading
APPENDIX 2
Links for further reading

20. APPENDIX 3
Summary
Please provide points to remember to understand the concept/ key terms of the animation, in the next slide.
The summary will help the user in the quick review of the concept.

21. APPENDIX 3
Summary
Seafloor spreading is a process that occurs at mid-ocean ridges, where new oceanic crust is formed by cooling of molten material coming to surface and then gradually moves away from the ridge. Seafloor spreading helps explain continental drift in the theory of plate tectonics.