EARTH SCI RECITATION

Question 1

its an important tool for geologists and paleontologists to study the rocks , fossil and other evidences for studying history and development of earth.

Answer 1

WHY DO WE NEED TO STUDY GEOLOGIC TIME SCALE

Question 2

what is geologic time scale?

Answer 2

CHRONOLOGICAL MEASUREMENT THAT RELATES STRATIGRAPHY TO TIME

Question 3

how are geologic time scale divided?

Answer 3

EON
ERAS
PERIODS
EPOCHS
AGE

Question 4

what are eons?

Answer 4

LARGEST MEASUREMENT OF TIME CONSISTING OF HADEANS, ARCHEANS , PRETOROZOIC

Question 5

describe hadean

Answer 5

INITIAL FORMATION OF EARTH ( METEORITES AND VOLCANIC ACTIVITIES )

Question 6

describe archean

Answer 6

TRANSFORMATION OF EARTH ATMOSPHERE THROUGH THE RELEASE OF OXYGEN BY EARLY PHOTOSYNTHETHIC ORGANISMS ALGAE AND BACTERIA

Question 7

describe proterozoic

Answer 7

INCREASE IN THE AMOUNT OF FREE OXYGEN IN THE ATMOSPHERE

Question 8

what are eras

Answer 8

UNIT OF TIME SHORTER THAN EON
( 100 milion years ) PALEOZOIC, MESOZOIC , CENOZOIC

Question 9

describe paleozoic

Answer 9

OLD LIFE

Question 10

describe mesozoic

Answer 10

MIDDLE LIFE

Question 11

describe cenozoic

Answer 11

RECENT LIFE

Question 12

what are period?

Answer 12

UNIT OF TIME THAT IS LONGER THAN EPOCH

Question 13

Cambrian period

Answer 13

AGE OF TRILLOBITES ( INVERTEBRAES ANIMALS )

Question 14

devonian period

Answer 14

AGE OF FISHES

Question 15

mississpians period

Answer 15

AGE OF ABUNDANT PLANTS AND ANIMALS

Question 16

MESOZOIC AS A PERIOD?

Answer 16

DINOSAURS RUR

Question 17

CENOZOIC AS A PERIOD

Answer 17

QUARTERNARY AND TERTIARY

Question 18

WHAT IS EPOCH ?

Answer 18

UNIT OF TIME SHORTER THAN PERIOD YET LONGER THAN AGE

Question 19

from tertiary period

Answer 19

RCOKS DEPOSITED PER EACH EPOCH TIME

PALEOCENE
EOCENE
OBLIGOCENE
MIOCENE
PLIOCENE

Question 20

FROM QUARTERNARY PERIOD

Answer 20

HOLOCENE - AGE OF HUMANS
PLEISTOCENE - ICE AGE