History Of Life

Question 1

What is the study of fossils called?

Answer 1

Paleontology

Question 2

What is the study of human history

Answer 2

Archeology

Question 3

What is the study of human culture

Answer 3

Anthropology

Question 4

What changing confitions is evolution affected by

Answer 4

Climate change and geological events

Question 5

Why was the cambrian expoltion important

Answer 5

· Oxygen levels rose so more growth for complex body forms
· Environment became warmer

Question 6

What are 3 theories of mads extinction

Answer 6

Cooling of atmosphere
Extraterritorial theory
Continental drift

Question 7

What is fossilisation

Answer 7

The process of replacing hard animal and plant parts with minerals

Question 8

What are the conditions for best preservation

Answer 8

Organism must be buried immediately
Must have hard parts
Must be buried in sed rock w acidicty and no oxygen

Question 9

What are the 4 stages of fossilization

Answer 9

1. Org dies and is buried
2. Layers of sed build up and press down on remains
3. Dissolved minerals fills spaces in bone and press down; overtime chemical reactions turn sed into rock and bones
4. Uncovered thru erosion or excavation

Question 10

What are the 3 types of fossils

Answer 10

Imprint fossils (pressed into soil)
Cast/mold fossils (remains of org)
Trace fossils (marks left behind)

Question 11

What is radiometric fossil dating

Answer 11

Using diff instruments to measure radioactive elements

Question 12

What is relative fossil dating

Answer 12

Index fosss typical of particular period

Question 13

What are the missing links

Answer 13

Coelacanth ( fish x amphibian)
Archaepteryx (bird x dino)
Thrinaxodon (reptile x mammal)

Question 14

Where was the Coelacanth found

Answer 14

East London coast

Question 15

Where was glossopteris found

Answer 15

Estcourt and mooi river in KZN

Question 16

Where were mammal like reptiles found

Answer 16

Karoo