7.4 How life developed

Fossils
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Fossils

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Today:
revision of 7.3
intro to 7.4

Learning objectives:
- what is Big Bang?
- how has Earth changed over time?
- how did life on earth changed over time? 

Slide 19 - Diapositive

what is the best definition of fossil?
A
fossils are preserved remains of once living organisms.
B
fossils are petrified remains, or traces, of organisms or part of organisms from the past.
C
fossils are any preserved remains, impression, or trace of any once-living thing from a past geological age
D
fossils are the preserved remains or traces of organisms (plants, animals, etc) that lived in the distant past

Slide 20 - Quiz

How old is a fossil at least?
A
>1.000 years
B
> 10.000 years
C
> 100.000 years

Slide 21 - Quiz

What is the importance of fossils?
A
they give clues of organisms that lived long ago
B
they provide evidence about how Earth's surface has changed over time
C
they help scientists understand what past environments may have looked like.

Slide 22 - Quiz

there are two main groups of fossils:
body & trace
what is NOT a body fossil?
A
bones
B
coprolite
C
egg
D
shell

Slide 23 - Quiz

there are two main groups of fossils:
body & trace
what is NOT a trace fossil?
A
burrow
B
carbon film
C
footprint
D
track

Slide 24 - Quiz

carbon film
preserved remain
cast
mold
trace fossil
petrified fossil

Slide 25 - Question de remorquage

what is a fossil?
A
oil formed from sea animals of long ago
B
sandstone showing ripple marks from water
C
arrowhead made thousands of years ago
D
animal tracks in rocks

Slide 26 - Quiz

characteristics of index fossils
A
Small geographical distribution, short range through time
B
Small geographical distribution, long range through time
C
Wide geographical distribution, short range through time
D
Wide geographical distribution, long range through time

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