← Year 8 Earth and space

Quick check: plate boundaries and evidence

A few quick questions on what happens where plates move apart, collide and slide past each other, and the evidence that plates move. Taught in class; use this to check yourself.

Earthquakes, volcanoes, mountains and trenches all happen at the edges of plates. What happens at each kind of edge?

Your teacher covers the three kinds of plate boundary and the evidence for plate tectonics in class. These questions check the basics.

ExplainUse the particle model to explain what you saw.

Moving apart

Two oceanic plates move apart. What forms at the gap?

You collect rock from the seafloor at the ridge and from far away on either side. Where is the rock youngest?

ExplainUse the particle model to explain what you saw.

Colliding

An oceanic plate meets a continental plate. What happens?

Why does a collision between two continents make mountains rather than subduction?

ExplainUse the particle model to explain what you saw.

Sliding past

Two plates slide past each other along a transform boundary. Why do earthquakes happen there?

Do transform boundaries have volcanoes?

Which kind of boundary is it?

Mid-ocean ridge
Ocean trench
San Andreas Fault in California
Himalayas
East African Rift

ExplainUse the particle model to explain what you saw.

Evidence

Is it evidence that the plates have moved?

The coastlines of South America and Africa fit together
The same fossils on continents now separated by ocean
The seafloor is youngest at the mid-ocean ridges
Earthquakes and volcanoes line up along plate edges
The Moon has craters

Which evidence most strongly shows the seafloor is spreading from ridges?

Match each piece of evidence to what it shows.

Coastlines of South America and Africa fit
The same fossils on continents now far apart
Seafloor youngest at the ridges
Earthquakes and volcanoes in lines

For teachers

A self-test on divergent, convergent and transform boundaries and the evidence for plate tectonics (AC9S8U03, nodes 3 to 6, taught in class; node 6 a hinge). About 18 minutes.

Open the teacher guide: answers, solutions, slides and a worksheet.

Students will be able to

Before class

A Quick check: a few questions on what students should know for AC9S8U03 nodes 3 to 6, which you teach in class. It has no board, no clip and no new teaching, and it is optional, so it never holds up course completion. Set the width with ?width=minimum, typical (default) or wider.

Use it as a self-test after your teaching, a starter, or revision. The Layers and What moves the plates lessons on screen come first (nodes 1 and 2); these are the boundaries and evidence you teach in class. Students can do one node at a time.

Running the lesson

  1. Do each boundary as a pair: a question and the "I can" line.
  2. Finish with the Which boundary sort and the evidence sort, then ask for a third line of evidence out loud.

The hard part (on purpose)

Keeping the three boundaries apart. When a student mixes them up, ask which way the plates are moving relative to each other.

When students get stuck

Stretch and support

Stretch: Choose a place (Japan, Iceland, the Andes, the Himalayas). Name its boundary type and two features that show it.

Support: Give a diagram of the three boundaries with arrows showing plate movement to label.

Where it leads

Back in class: model the boundaries with trays or modelling clay; plot recent earthquakes and volcanoes on a world map.

What each step is for

Now you can
Next lesson5. Quick check: sedimentary, metamorphic and the rock cycleA few quick questions on how sedimentary and metamorphic rocks form, how rocks change from one type to another, and why properties decide how rocks are used. Taught in class; use this to check yourself.