plate tectonics core assignment 2 answer

Bartley Secondary SchoolUpper Secondary Geography

Core Assignment 2 [Mark Scheme]

Name: ________________________________ ( ) Class: _____ Date: ___________

Marks

Topic: Plate Tectonics

Skills/Knowledge: - Describing distribution reviewed- Drawing well-labelled diagrams with explanation- Comparison questions reviewed

Question Overview: 1) With reference to Fig. 1, describe the distribution of the Earth’s plate boundaries. [3]2) Using a well-labelled diagram, explain why tectonic plates move. [5]3) Compare between the oceanic crusts and continental crusts. [3]

Teacher’s General Feedback:

Observation Tick and/or Comments

Lack content knowledge or incorrect referencing

Misconception of knowledge

Misinterpretation of question

Mis-analysis of question marks

Awkward expression of answer

Mismanagement of time / effort

Student Reflection:

1 Star (what way you did well) 1 Wish (what you could improve on based on teacher’s feedback)

This has to do with how you answered. Do not just blindly copy the observation above!

Additional comments from student:

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1 Study Fig. 1, which shows the distribution of Earth’s major tectonic plates.

Map showing distribution of Earth’s major tectonic plates

Fig. 1(please refer to page 9 of textbook for a clearer view of the colours)

With reference to Fig. 1, describe the distribution of the Earth’s plate boundaries. [3]

- Divergent plate boundaries are mainly found on the oceans, such as the eastern part of the Pacific Ocean and the middle of the Atlantic Ocean.- Convergent plate boundaries are found mostly along or within continents, such as the western coast of South American plate and south of Indonesia, and the middle between Indian and Eurasian plate.- Transform plate boundaries are typically lesser than the other two, and are found both on oceans, such as the Scotia and South American Plate, and on land, such as the Anatolian and Eurasian plate.

2 Using a well-labelled diagram, explain why tectonic plates move. [6]

2 marks max for diagram; 4 marks max for written explanation

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- (Convection current) Movements of heat within the mantle due to it being heated by the core, this causes the mantle material to expand, rise and spread out beneath the plates- (Spreading arrow) The spreading causes the plates to be dragged along the current and move away from each other- (Downward arrow; Slab-pull force) The mantle material cools slightly and sinks, pulling the plates along. This is the slab-pull force which pulls the rest of the plate behind it at a subduction zone when a dense oceanic plate sinks.- (Completed convection circle) The sinking mantle material heats up again as it nears the core and the whole process repeats.

3 Compare between the oceanic crusts and continental crusts. [3]

- Both oceanic crusts and continental crusts are the outermost layers of the earth’s internal structure.- Oceanic crusts are mainly found beneath deep oceans while continental crusts are found beneath the earth’s continental land masses and under shallow seas.- Oceanic crusts are thinner between 5 and 8 km but denser, while continental crusts are thicker between 35 and 70 km but lighter

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plate tectonics core assignment 2 answer

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