Across:
1: The earth was formed 4.6 billion years
... (3)
4: The symbols for the two elements in
pure quartz (1,2)
6: The feature of some plants adapted to
attract insects (6)
8: Grows in reefs (5)
9: A type of sediment (4)
10: This part of a crustacean is
sometimes very well fossilised (6)
14: The Tertiary period was number ...
(6)
17: Fossils tell us about life in the ...
(4)
18: Odd parasites adapted to trees and
toes (5)
19: Megarachne was the largest ever ...
(6)
20: Stratum or layer of rock (3)
21: A mass extinction came at the ... of
the Permian period (3)Down:
1: A spiralled cephalopod (8)
2: Fossils not found on land are found
... (8)
3: An echinoid (6)
5: A sedimentary rock (5)
7: Viscous liquids containing
microfossils(4)
11: A fossil is the remainder or
representation of a ... (8)
12: Fossil fish sank to this before
quickly being covered with sediment (8)
13: A creature must do this before it can
be fossilised (6)
15: An ancient parasite (5)
16: Another type of sediment (4)
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answers
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