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Lesson planning
guide
H2 Cool rocks?
Learning objectives
i
ii
iii
iv
v
Igneous rocks crystallise from molten rock called magma.
Molten magma reaching the Earth’s surface is called lava.
Magma that cools quickly forms igneous rocks with small crystals.
Lava/magma that cools slowly forms igneous rocks with large crystals.
Igneous rocks contain different minerals, this gives them different colours (red only: and densities).
Scientific enquiry
vi
vii
Model how rate of cooling affects crystal size. (Framework YTO Sc1 8a)
Use first hand and secondary data. (Framework YTO Sc1 8c)
Suggested alternative starter activities (5–10 minutes)
Recap last lesson
Share learning objectives
Brainstorming
Capture interest (1)
Capture interest (2)
Ask pupils to work in
groups to make a list of
five reasons why
different types of
sedimentary rock are
different from each
other.
 Find out about igneous rock
 Find out how they are
formed
 Be able to use a range of
first hand experience,
secondary sources of
information and ICT. (Sc1)
Pupils work in
groups to
brainstorm the
questions ‘Where
does the material
erupting from a
volcano come
from?’ and ‘What
are the different
materials that come
out of a volcano?’
Pass pieces of pumice
around the class. Ask for
ideas about how it was
formed.
Show video clips of
volcanic eruptions of
Monserrat and Hawaii
volcanoes.
Catalyst Interactive
Presentations 2
Suggested alternative main activities
Activity
Learning
objective
see above
Description
Textbook H2
i, ii, iii, iv and
v
Activity H2a
Practical
Activity H2b
Practical
i, iii, iv and vi
Activity H2c
Paper
i, ii, v and vii
Teacher-led explanation and questioning OR pupils work
individually, in pairs or in small groups through the in-text
questions and then onto the end-of-spread questions if time
allows.
Igneous rocks Pupils investigate the size of crystals produced
when igneous rocks form using salol
Comparing igneous rocks Pupils compare how the chemical
composition affects the colour (Help) and the densities if
igneous rocks (Core/Extension)
Volcano composition Pupils interpret data about the relative
composition of four igneous rocks and relate it to different types
of volcanic activity.
i and v
Approx
timing
Target group
C
H
E
S
20 min
R/G
G
R
S
30 min
20 min
10 min
( )
Suggested alternative plenary activities (5–10 minutes)
Review learning
Sharing responses
Group feedback
Word game
Looking ahead
Pupils identify a rock
as sedimentary,
metamorphic or
igneous from a
description.
Model crystal size and
cooling rates with
pupils representing
atoms sticking
together with time to
form crystals.
Pupils work in groups to
match the physical
properties and origins of
igneous rocks, using data
from Activity H2b.
Pupils sort igneous
rocks into rapidcooling types and
slow-cooling types.
Pupils work in groups of 3 or 4
to brainstorm what happens to
rocks over the passage of
millions of years.
Learning outcomes
Most pupils will …
Some pupils, making less progress
will …
Some pupils, making more
progress will …
 describe volcanic activity
 describe the characteristics of igneous rocks
 explain that igneous rocks are formed when
lava or magma solidifies
 explain how fast cooling gives small crystals
and slow cooling gives large crystals
 assign igneous rocks to two main groups,
dense iron rich or less dense silica rich.
 describe volcanic activity
 name granite and basalt as examples of
igneous rocks
 begin to relate crystal size in granite and
basalt to rate of cooling.
 assign igneous rocks to two main groups,
dense iron rich or less dense silica rich.
 explain in terms of the particle model
how different rates of cooling results in
the formation of different types of
igneous rocks
 relate chemical composition of magma
to types of volcanic activity.
Key words
igneous rock, magma, lava, basalt, granite, red
only: density, volcano, extrusive, intrusive
Out-of-lesson learning
Homework H2
Textbook H2 end-of-spread questions
Activity H2c
Read about volcanic eruption-newspaper articles
© Harcourt Education Ltd 2004 Catalyst 2
This worksheet may have been altered from the original on the CD-ROM.
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