4
CHAPTER
Why does the Earth move?
SA LE
Is the Earth shrinking or moving?
TECTONIC PLATES
The Earth has a solid core
Boundaries between the tectonic plates can be converging, diverging or transforming
O N
LY
4.3
-N
O
T
4.2
FO
R
4.1
D
R AF
T
4.4
Tectonic plates can be constructive or destructive
4.5
Science as a human endeavour: What will the Earth look like in the future?
What if? Clay plates
What you need: Modelling clay What to do: 1 Divide the clay into two equal portions. 2 Flatten out each portion to approximately 1 cm thick. 3 Gently slide the portions towards each other. What if? » What if one portion slides over the other? » What if the two clay portions are jammed together? » What if the two portions are moved apart?
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