Question

how do fossils provide evidence of environmental changes that occured in the past?

Answer 1

Fossils provide the age in which the animal died and may give some answers to what happened to that animal.

Answer 2

are you sure

Answer 3

I think so...

Answer 4

where did you find the answer?

Answer 5

I'm not exactly sure but I know that is what a fossil shows.

Answer 6

What grade are you in?

Answer 7

5th

Answer 8

what grade are you in

Answer 9

oh ok same!

Answer 10

which school

Answer 11

I'm homeschooled, what about you?

Answer 12

can i ask you another question?

Answer 13

yeah sure!

Answer 14

What are the different types of divisions of geologic time?

Answer 15

are you there

Answer 16

EONS -- The first and largest division of geologic time.
ERAS -- The second division of geologic time; each era has at least two periods.
PERIODS-- The third division of geologic time. Periods are named for either location or characteristics of the defining rock formations.

Location = the region where the period's characteristic rocks were first studied.

Characteristics = the nature of the unique system of rocks and rock formations that define the Period.

EPOCHS -- The fourth division of geologic time; represents the subdivisions of a period.
The time of the transition from one interval of geologic time to the subsequent one
is usually marked by a relatively abrupt change in fossil types and numbers.

is not known precisely, with the uncertainty increasing with increasing age since fossils become rarer and harder to identify in the distant past.

Answer 17

so basically eons, eras, periods, and epochs

Answer 18

thx!!!!!!!

Answer 19

no problem!

Answer 20

can i ask another question

Answer 21

are you there