B2.8 Fossils Flashcards
1
Q
How can fossils be preserved? [4]
A
1) In tree sap (no oxygen)
2) In casts and impressions due to pressure from the sediments
3) High soil acidity (peat bog)
4) In ice
2
Q
What can we tell from a fossil? [3]
A
- How animals evolved
- What the looked like
- What time period they lived in
3
Q
What are the limitations of finding out information from fossils? [3]
A
- There aren’t enough fossils
- They can be hard to find
- Soft bodied animals don’t produce fossils (jelly fish)
4
Q
Define extinction
A
The permanent loss of an entire species
5
Q
What can cause extinction? [8]
A
- New competitor
- New predator
- Over hunting
- Disease
- Natural disaster
- Climate change
- Starvation
- Deforestation
