New
New
Year 8

The rock cycle

I can identify the three main types of rocks, and recognise how they are formed by different processes.

New
New
Year 8

The rock cycle

I can identify the three main types of rocks, and recognise how they are formed by different processes.

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Lesson details

Key learning points

  1. There are three types of rock; igneous, sedimentary and metamorphic.
  2. Igneous rocks are volcanic rocks and examples include basalt, obsidian and granite.
  3. Sedimentary rocks are formed from sediments and examples include sandstone, limestone and chalk.
  4. Metamorphic rocks are formed through heat and pressure and examples include slate, gneiss and marble.

Keywords

  • Rock - the solid mineral material forming part of the surface of Earth

  • Process - a process is an ordered series of actions, events or changes that make something happen

  • Pressure - pressure is a force pushing or pressing on a given area

  • Erosion - the process of Earth’s surface, e.g. rock or soil, being worn away

  • Weathering - The process of being worn down due to exposure to the atmosphere.

Common misconception

There is only one type of rock, and rocks can't change.

Students will explore the three main types of rock found on Earth, and understand how rocks are recycled through the rock cycle.


To help you plan your year 8 geography lesson on: The rock cycle, download all teaching resources for free and adapt to suit your pupils' needs...

You could use rock samples or edible models (e.g. crumbled cookies for sedimentary rocks, melted chocolate for igneous rocks, and compressed marshmallows for metamorphic rocks) to help students understand the differences between the rock types and how they change over time.
Teacher tip

Equipment

Licence

This content is © Oak National Academy Limited (2025), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

Lesson video

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6 Questions

Q1.
What is geology the study of?
Stars and planets
Plants and animals
Correct answer: Rocks, Earth’s structure, and history
Oceans and rivers
Q2.
What is geological time?
Correct answer: A way to measure time based on Earth's history
The study of clocks and calendars
The time it takes for a rock to form
Q3.
What is the shortest unit of geological time?
Era
Correct answer: Epoch
Eon
Century
Q4.
What is used to divide Earth's history into different time periods?
The movement of planets
Correct answer: Climate changes and rock layers
The length of a human lifespan
Q5.
What do fossils tell us about Earth's history?
The age of the universe
How rocks are formed
Correct answer: Evidence of past life and environments
Q6.
What are the three main types of rock?
Correct answer: Igneous, sedimentary, metamorphic
Hard, soft, smooth
Hot, cold, wet
Granite, marble, sandstone

4 Questions

Q1.
Can rocks change over time, and are there different types?
No, all rocks stay the same forever
Yes, but only one type of rock exists
Correct answer: Yes, rocks can change and there are three main types
No, rocks only form once and never change
Q2.
How do igneous rocks form?
Correct answer: From cooling magma or lava
From compressed plant material
From weathered and eroded rock
By being buried under soil
Q3.
What is weathering?
The process of rocks breaking down due to heat
Correct answer: The process of rocks breaking down due to wind, water, or ice
The process of rocks forming into new types
The process of rocks moving from one place to another
Q4.
What causes metamorphic rocks to form?
Wind and rain erosion
Weathering, erosion, and compaction
Correct answer: Extreme heat and pressure
Freezing and thawing