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Earth’s structure & plate boundaries

Examine Earth’s internal layers, tectonic plate boundaries and the rock cycle. Review suitability for your learners before teaching.

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Worksheet StudioPractice pack · Ages 13-15

Earth’s structure & plate boundaries

Take your time. Show your thinking.

1. What type of tectonic plate boundary occurs where two plates move apart and new oceanic crust forms: divergent or convergent?
What type of tectonic plat… · Earth’s structure & plate …
2. What generates Earth’s global magnetic field (magnetosphere): convection of liquid metal in the outer core, or ocean tides?
What generates Earth’s glo… · Earth’s structure & plate …
3. When slow-cooling magma solidifies deep underground (such as granite), does it form large visible crystals or no crystals?
When slow-cooling magma so… · Earth’s structure & plate …
4. What is the thin, outermost rocky layer of the Earth called: the crust or the inner core?
What is the thin, outermos… · Earth’s structure & plate …
5. Why are fossils almost always found in sedimentary rock rather than igneous rock: molten magma destroys organic remains, or sedimentary rock forms in volcanoes?
Why are fossils almost alw… · Earth’s structure & plate …
6. What class of rock forms from the compaction and cementation of deposited layers of sand, silt or shells (e.g. sandstone and limestone): sedimentary or metamorphic?
What class of rock forms f… · Earth’s structure & plate …
7. Is Earth’s inner core solid or liquid despite its extreme temperature, due to immense pressure?
Is Earth’s inner core soli… · Earth’s structure & plate …
8. What do we call molten rock while it is still beneath Earth’s surface, before it erupts as lava: magma or shale?
What do we call molten roc… · Earth’s structure & plate …
9. What type of plate boundary occurs where two plates slide horizontally past each other (such as the San Andreas Fault): transform or divergent?
What type of plate boundar… · Earth’s structure & plate …
10. What do we call the rigid outer shell of Earth comprising the crust and uppermost solid mantle: the lithosphere or the stratosphere?
What do we call the rigid … · Earth’s structure & plate …
11. What process breaks rocks down in situ at Earth’s surface through rain, frost and plant roots before erosion transports the fragments: weathering or subduction?
What process breaks rocks … · Earth’s structure & plate …
12. Which type of crust is denser and thinner, causing it to subduct beneath continental crust: oceanic crust or continental crust?
Which type of crust is den… · Earth’s structure & plate …

12 questions · Seed 104730 · Age guidance, not curriculum certification

View the answer key

Worksheet StudioAnswer key · Ages 13-15

Earth’s structure & plate boundaries

Answers and reasoning. Review before teaching.

1. What type of tectonic plate boundary occurs where two plates move apart and new oceanic crust forms: divergent or convergent?
Divergent
At divergent boundaries (such as mid-ocean ridges), plates pull apart and magma rises to solidify.
2. What generates Earth’s global magnetic field (magnetosphere): convection of liquid metal in the outer core, or ocean tides?
Convection of liquid metal in the outer core
The geodynamo is driven by convective motion of electrically conducting liquid iron in the outer core.
3. When slow-cooling magma solidifies deep underground (such as granite), does it form large visible crystals or no crystals?
Large visible crystals
Slow cooling gives mineral crystals time to grow large (coarse-grained).
4. What is the thin, outermost rocky layer of the Earth called: the crust or the inner core?
The crust
The crust is Earth’s outermost solid shell, above the mantle.
5. Why are fossils almost always found in sedimentary rock rather than igneous rock: molten magma destroys organic remains, or sedimentary rock forms in volcanoes?
Molten magma destroys organic remains
Sedimentary layers gently bury organisms, whereas extreme igneous heat destroys them.
6. What class of rock forms from the compaction and cementation of deposited layers of sand, silt or shells (e.g. sandstone and limestone): sedimentary or metamorphic?
Sedimentary
Sedimentary rocks form from accumulated mineral or organic sediments.
7. Is Earth’s inner core solid or liquid despite its extreme temperature, due to immense pressure?
Solid
Crushing pressure at the centre of the Earth keeps the iron-nickel inner core solid.
8. What do we call molten rock while it is still beneath Earth’s surface, before it erupts as lava: magma or shale?
Magma
Molten rock underground is called magma; once it erupts onto the surface it is called lava.
9. What type of plate boundary occurs where two plates slide horizontally past each other (such as the San Andreas Fault): transform or divergent?
Transform
Transform boundaries involve horizontal shear motion without creating or destroying crust.
10. What do we call the rigid outer shell of Earth comprising the crust and uppermost solid mantle: the lithosphere or the stratosphere?
Lithosphere
Tectonic plates are fragments of the rigid lithosphere floating on the asthenosphere.
11. What process breaks rocks down in situ at Earth’s surface through rain, frost and plant roots before erosion transports the fragments: weathering or subduction?
Weathering
Weathering breaks rock down in place; erosion moves the weathered material.
12. Which type of crust is denser and thinner, causing it to subduct beneath continental crust: oceanic crust or continental crust?
Oceanic crust
Basaltic oceanic crust (≈3.0 g/cm³) is denser than granitic continental crust (≈2.7 g/cm³).

12 questions · Seed 104730 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 13-15

Earth’s structure & plate boundaries

Take your time. Show your thinking.

1. What type of tectonic plate boundary occurs where two plates move apart and new oceanic crust forms: divergent or convergent?
What type of tectonic plat… · Earth’s structure & plate …
2. What generates Earth’s global magnetic field (magnetosphere): convection of liquid metal in the outer core, or ocean tides?
What generates Earth’s glo… · Earth’s structure & plate …
3. When slow-cooling magma solidifies deep underground (such as granite), does it form large visible crystals or no crystals?
When slow-cooling magma so… · Earth’s structure & plate …
4. What is the thin, outermost rocky layer of the Earth called: the crust or the inner core?
What is the thin, outermos… · Earth’s structure & plate …
5. Why are fossils almost always found in sedimentary rock rather than igneous rock: molten magma destroys organic remains, or sedimentary rock forms in volcanoes?
Why are fossils almost alw… · Earth’s structure & plate …
6. What class of rock forms from the compaction and cementation of deposited layers of sand, silt or shells (e.g. sandstone and limestone): sedimentary or metamorphic?
What class of rock forms f… · Earth’s structure & plate …
7. Is Earth’s inner core solid or liquid despite its extreme temperature, due to immense pressure?
Is Earth’s inner core soli… · Earth’s structure & plate …
8. What do we call molten rock while it is still beneath Earth’s surface, before it erupts as lava: magma or shale?
What do we call molten roc… · Earth’s structure & plate …
9. What type of plate boundary occurs where two plates slide horizontally past each other (such as the San Andreas Fault): transform or divergent?
What type of plate boundar… · Earth’s structure & plate …
10. What do we call the rigid outer shell of Earth comprising the crust and uppermost solid mantle: the lithosphere or the stratosphere?
What do we call the rigid … · Earth’s structure & plate …
11. What process breaks rocks down in situ at Earth’s surface through rain, frost and plant roots before erosion transports the fragments: weathering or subduction?
What process breaks rocks … · Earth’s structure & plate …
12. Which type of crust is denser and thinner, causing it to subduct beneath continental crust: oceanic crust or continental crust?
Which type of crust is den… · Earth’s structure & plate …

12 questions · Seed 104730 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 13-15

Earth’s structure & plate boundaries

Answers and reasoning. Review before teaching.

1. What type of tectonic plate boundary occurs where two plates move apart and new oceanic crust forms: divergent or convergent?
Divergent
At divergent boundaries (such as mid-ocean ridges), plates pull apart and magma rises to solidify.
2. What generates Earth’s global magnetic field (magnetosphere): convection of liquid metal in the outer core, or ocean tides?
Convection of liquid metal in the outer core
The geodynamo is driven by convective motion of electrically conducting liquid iron in the outer core.
3. When slow-cooling magma solidifies deep underground (such as granite), does it form large visible crystals or no crystals?
Large visible crystals
Slow cooling gives mineral crystals time to grow large (coarse-grained).
4. What is the thin, outermost rocky layer of the Earth called: the crust or the inner core?
The crust
The crust is Earth’s outermost solid shell, above the mantle.
5. Why are fossils almost always found in sedimentary rock rather than igneous rock: molten magma destroys organic remains, or sedimentary rock forms in volcanoes?
Molten magma destroys organic remains
Sedimentary layers gently bury organisms, whereas extreme igneous heat destroys them.
6. What class of rock forms from the compaction and cementation of deposited layers of sand, silt or shells (e.g. sandstone and limestone): sedimentary or metamorphic?
Sedimentary
Sedimentary rocks form from accumulated mineral or organic sediments.
7. Is Earth’s inner core solid or liquid despite its extreme temperature, due to immense pressure?
Solid
Crushing pressure at the centre of the Earth keeps the iron-nickel inner core solid.
8. What do we call molten rock while it is still beneath Earth’s surface, before it erupts as lava: magma or shale?
Magma
Molten rock underground is called magma; once it erupts onto the surface it is called lava.
9. What type of plate boundary occurs where two plates slide horizontally past each other (such as the San Andreas Fault): transform or divergent?
Transform
Transform boundaries involve horizontal shear motion without creating or destroying crust.
10. What do we call the rigid outer shell of Earth comprising the crust and uppermost solid mantle: the lithosphere or the stratosphere?
Lithosphere
Tectonic plates are fragments of the rigid lithosphere floating on the asthenosphere.
11. What process breaks rocks down in situ at Earth’s surface through rain, frost and plant roots before erosion transports the fragments: weathering or subduction?
Weathering
Weathering breaks rock down in place; erosion moves the weathered material.
12. Which type of crust is denser and thinner, causing it to subduct beneath continental crust: oceanic crust or continental crust?
Oceanic crust
Basaltic oceanic crust (≈3.0 g/cm³) is denser than granitic continental crust (≈2.7 g/cm³).

12 questions · Seed 104730 · Age guidance, not curriculum certification