C3 Lesson 2 Useful Rocksx

heehawultraMécanique

22 févr. 2014 (il y a 3 années et 4 mois)

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C3

Chemicals in Our
Lives


Risks & Benefits

Lesson 2: Useful Rocks

Objectives


MUST

explain how resources in
the Earth were formed


SHOULD

explain how geologists
discover how rocks were formed


COULD

explain how the
development of the chemical
industry depended on resources
being available nearby

Key

Words


You need to be able to define the
following:


Sediment


Sedimentary rock


Eroded


Dissolved


Evaporated

Textbook Answers

1)

a) Coal, limestone, salt; b) Easy to transport
to the factories.

2)

Sedimentation



limestone and coal;
evaporation



salt;
mountain building



limestone;
dissolving



salt; erosion


limestone.

3)

Coal was formed in hot tropical climates; salt
was formed when climates turned hot and dry.

4)

a) Contains small, smooth grains of wind
-
blown sand.



b) Made up of shells of animals that lived in
the sea and contains other fossil sea creatures;
there may be ripples showing that the rock was
formed on the bed of rivers or the sea.

Worksheet Answers

Activity 1 (Low demand)

1)

Coal


burning in steam engines; limestone


building and farming; salt


flavouring and
preserving food.

Activity 2 (Standard demand)

1)

Rock cycle diagram;
coal



sedimentation and
compression;
limestone



sedimentation,
compression, uplift, weathering, erosion;
salt



dissolving, evaporation, compression.

2)

Moved through different climates; which
resulted in different rocks being laid down.


Worksheet Answers

Activity 3 (High demand)

1)

Contains small, rounded grains.

2)

Waves when the sediment lay at the
bottom of a river or sea.

3)

The age of the rock; the conditions in
which the rock formed; the climate at the
time.