Chapter 14

Question 0

What are fossils and what do they they do?

Answer 0

Fossils are preserved evidence of an organism. They provide eve since of past life.

Question 1

How many years was earth inhabited?

Answer 1

Several hundred million years

Question 2

What is Radiometric and Relative dating and what do they do?

Answer 2

Relative- determines age of rocks

Radiometric- determine age of fossils by radioactive isotopes.

Question 3

What is the geologic time scale?

Answer 3

A model that expresses eras and periods in life.

Question 4

What are the eras of time and their date?

Answer 4

Precambrian- 4500 MYA- 542 MYA
Paleozoic-488.3 MYA-251 MYA
Mesozoic-199.6 MYA-65.5 MYA
Cenozoic-55.8 MYA- Present

Question 5

What kind of scientist study fossils?

Answer 5

Paleontologist

Question 6

Define chapter 14 vocab and read.

Answer 6

392-407

Question 7

What is spontaneous generation and was it disapproved?

Answer 7

Yes, it is the idea that life comes from non-life.

Question 8

The origin of life is hypothesized to be a?

Answer 8

Series of chemical events

Question 9

Organic molecules came from?

Answer 9

Simpler molecules from early earth.

Question 10

The first cells were?

Answer 10

Autotrophic and prokaryotic.

Question 11

What does the endosymbiont theory say?

Answer 11

Eukaryotic cells probably came from prokaryotic cells.