SCIENCE DEPARTMENT. GATEWAY 2006 MODULE: C2b Construction Materials

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SCIENCE DEPARTMENT.
GATEWAY 2006


MODULE:

C2b Construction Materials



Lesson
No.

Lesson Outcome

Lesson Focus

&
key words

Practical activities

Reference
and
worksheets

Video/ICT/oth
er activities.

Homework
tasks.


Lesson 3


Material
s
used for
construction

























State the names of some construction
materials:



Aluminium and iron



Brick,cement,concrete,glass



Granite, limestone marble


State t
hat some construction materials are
manufactured from rocks in the earth’s crust



Al and Fe
(steel)

from ores



Brick from clay



Glass from sand


State that some rocks are used to construct
buildings eg granite limestone, marble

Order of hardness
:

Granite >
mar
ble >limestone


Reasons for difference in hardness



Limestone is sedimentary



Marble is metamorphic formed by
action of heat and high peressure
on limestone



Granite is an igneous rock




Lesson Focus

1.
Name and use of
key construction
materials

KEY words:

A
luminium

Iron(steel)

Brick

Concrete

Cement

glass


2.
The differences in
properties of rocks,
linked to their origin


Key words

Granite
(igneous)

Marble
(metamorphic)

Limestone

(sedimentary)






Demo C2b 1

Samples of building materials
and natural rock for
pupils to
be shown
.






Cp

C2b 4

Test hardness og granite,
marble, limestone (note chalk
is a very soft form of
limestone)

Reaction with acid

to identify
the presence of calcium
carbonate

Student bk

p138


w/s C2b 1

Construction
materials

(link to p138)





w/s C2b 4

“Limestone”

(instruction +
questions)

New
boardworks


Building
materials and
rocks:

Materials from
Earth slide 3
-
7





Make a survey of
3 buildings(eg
house where
they live, school
,church) and
compare the
materials used in
the building of
eac
h one


Lesson 4



Making
concrete


Describe that concrete is made when
cement, sand or gravel are mixed together
with water and allowed to set


Cement is made when limestone and clay
are heated together


Concrete is reinforced by allowing the
concrete to

set around a steel support


Reinforced concrete is a composite material


Reinforced concrete is a better construction
material than no
-
reinforced concrete due to:



Hardness of the concrete

Prepare a sample of
concre
te



using a mix of
cement, sand and
water

(
note the concrete
needs to be left to
set and tested in a
later lesson)


Key Words

Concrete

Reinforced



Cp C2b 3



Making concrete bars


Can

Do task (3 points)

Make and test samples of
concrete for their strengt
h

Student book

P141

w/s C2b3

New
boardworks


Building
materials and
rocks:

V2


What is
cement?
Slides 6
-
9






Flexibility and strength of the steel




Lesson 5.



Chemistry
of rocks

and
environmen
tal effects of
quarrying


State that limestone and marble are both
forms of calcium carbonate



L
imestone can be heated and decomposes
to make calcium oxide and carbon dioxide

Word equation:

Calcium carbonate


calcium oxide +
carbon dioxide

(
Note:Use of calcium oxide to make lime for
cement to make
concrete)


Thermal decomposition is a reaction in wh
ich
one heated substance is chemically changed
into at least TWO new substances


Balanced symbol equation


CaCO
3



CaO + CO
2





Environmental problems linked to removing
rocks from the ground:



Landscape destroyed,
reconstruction o
nce mining or
quarrying finished



Quarries and mines take up land
-
space



Increased noise, traffic and dust



1.
The chemistry of
rocks


Key Words


Thermal
decomposition

Cement













2.Environmental
effects of mines and
quarries



Demo/ cp (higher)
C2b

5

Heat
c
opper

carbonate in a
test tube and test gas given off
with lime water

(NOTE the
use of copper
carbonate as calcium
carbonate needs a very high
temp to decompose)


Can
-
Do task (1 point)

Safely heat a sample of a
chemical in a test tube


Student bk

p1
41


Overhead

C2b 5

“Thermal
decomposition of
copper carbonate”


C2b 6

(laminated
Cards)

The formula
of

Ca CO
3


(useful for revising
chemical formula and
balancing equations!)



Student bk

p140





New
Boardworks



Building
materials and
rocks: V2



Pro
ducts from
limestone
slides 11
-
16





Effects of
Quarrying
slides 23
-
25




Summary
slides 32
-
36






















C2b H/w

Getting building
materials out of
the ground

(
literacy)