7.6 What have I learnt - 7.3 how about fossils?

• biologie
• Middelbare school
• vwo
• Leerjaar 3

7. An epic journey 

Benodigheden

- iPad

- Pen, pencil

- note book

- binder

For a mark

- No

Lessonup

- Yes

Bags

in bag closet

Phones 

in phone closet

today''s program 

learning objectives 

• what role do fossils play in the theory of evolution?
• how are fossils formed?
• how are fossils dated? 

first ... 

read the paragraph and make a schematic summary 

what is the best definition of fossil?

1. fossils are preserved remains of once living organisms.
2. fossils are petrified remains, or traces, of organisms or part of organisms from the past.
3. fossils are any preserved remains, impression, or trace of any once-living thing from a past geological age
4. fossils are the preserved remains or traces of organisms (plants, animals, etc) that lived in the distant past

How old is a fossil at least?

1. >1.000 years
2. > 10.000 years
3. > 100.000 years

What is the importance of fossils?

1. they give clues of organisms that lived long ago
2. they provide evidence about how Earth's surface has changed over time
3. they help scientists understand what past environments may have looked like.

there are two main groups of fossils:
body & trace
what is NOT a body fossil?

1. bones
2. coprolite
3. egg
4. shell

there are two main groups of fossils:
body & trace
what is NOT a trace fossil?

1. burrow
2. carbon film
3. footprint
4. track

carbon film

preserved remain

cast

mold

trace fossil

petrified fossil

what is a fossil?

1. oil formed from sea animals of long ago
2. sandstone showing ripple marks from water
3. arrowhead made thousands of years ago
4. animal tracks in rocks

characteristics of index fossils

1. Small geographical distribution, short range through time
2. Small geographical distribution, long range through time
3. Wide geographical distribution, short range through time
4. Wide geographical distribution, long range through time

what's the difference between absolute and relative dating?

how is absolute dating done?