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Fossils

1. ALFEIHLF

of a radioactive element is the time it takes for half of the radioactive atoms to decay

2. COLAMRBNIF

an extremely thin layer of coating on a rock

3. RAGTAIEVEEL

a rock is its age compared to the ages of other rocks

4. SFOLSIS

are persevere remains or traces of living things

5. ARES

Geologist divide the time between Precambrian Time and the present into three long units of time

6. BSEEALTAUGO

a rock is the number of years that have passed since the rock form

7. FORAISSSETCL

provide evidence of the activities of ancient organisms

8. NDSOEXISFIL

a fossil must be widely distributed and represent an organism that existed for a geologically short period of time.

© 2013 PuzzleFast.com, Noncommercial Use Only

Fossils

1. ALFEIHLF

of a radioactive element is the time it takes for half of the radioactive atoms to decay

H	A	L	F	L	I	F	E

2. COLAMRBNIF

an extremely thin layer of coating on a rock

C	A	R	B	O	N		F	I	L	M

3. RAGTAIEVEEL

a rock is its age compared to the ages of other rocks

R	E	L	A	T	I	V	E		A	G	E

4. SFOLSIS

are persevere remains or traces of living things

F	O	S	S	I	L	S

5. ARES

Geologist divide the time between Precambrian Time and the present into three long units of time

E	R	A	S

6. BSEEALTAUGO

a rock is the number of years that have passed since the rock form

A	B	S	O	L	U	T	E		A	G	E

7. FORAISSSETCL

provide evidence of the activities of ancient organisms

T

R

A

C

E

F

O

S

S

I

L

S

8. NDSOEXISFIL

a fossil must be widely distributed and represent an organism that existed for a geologically short period of time.

I	N	D	E	X		F	O	S	S	I	L

© 2013 PuzzleFast.com, Noncommercial Use Only