Earth's Timeline

Question 1

refers to the process of determining or estimating the age of the earth

Answer 1

Geologic Dating

Question 2

Geologist utilize two methods of dating

Answer 2

Relative and Absolute

Question 3

scientist compare the relative agents of artifacts, fossils and rock sediments which each other to give an estimation or comparative data

Answer 3

Relative dating

Question 4

Different ways of relative dating

Answer 4

•Stratigraphy or stratification
•Cross-dating

Question 5

(horizontal layering) of large sediments that formed large rocks

Answer 5

Stratigraphy or Stratification

Question 6

scientist study the fossils found in each later and identify their relative ages

Answer 6

Cross-dating

Question 7

This method suggest that fossils found in top layers of rocks are younger than fossils found in the bottom layers of rock

Answer 7

Cross-dating

Question 8

it is used to provide more precise and numerical origin dates and time ranges for particular geological materials

Answer 8

Absolute Dating

Question 9

It can also give direct measurement of the fossil’s age

Answer 9

Absolute Dating

Question 10

Different method of absolute dating

Answer 10

Radiometric or Radiocarbon dating

Question 11

The formation of the solar system gave risk to the existence of our planet. The planets 4.6 billion year history is subdivided into several major units of time

Answer 11

Geologic Timescale

Question 12

By the time Earth emerged from the combining elements, it was spinning rapidly and appeared like an alien planet

Answer 12

Precambrian Era

Question 13

When was the planet experienced a turning point when it collided with a celestial object as huge as Mars?

Answer 13

4.5 billion years ago

Question 14

It is when thr Earth’s surface was too hot that water was vaporizing/turning into steam

Answer 14

4.4 Billion Years Ago

Question 15

The first organisms with genetic molecules are?

Answer 15

Cyanobacteria

Question 16

microorganisms that evolved and later developed the ability to harness energy from thr sun and produce one of the most essential gases for life forms

Answer 16

Cyanobacteria

Question 17

a shorter period in Earth’s history when various life forms

Answer 17

Cambrian explosion

Question 18

about 550 million years ago, with oxygen in the primeval ocean and atmosphere, marine communities flourished

Answer 18

Paleozoic Era

Question 19

It is where the fish, plants and the first amphibians emerged from the ocean and lived

Answer 19

Paleozoic Era

Question 20

It is where the volcanic activity filled up the atmosphere with carbon dioxide

Answer 20

250 million years ago

Question 21

This marked the end of Paleozoic Era and the emergence of new one

Answer 21

Permian Extinction

Question 22

This era is also known as the era of dinosaurs. The Mesozoic Era ushered in the existence gymnosperms and reptiles that dominated the land.

Answer 22

Mesozoic Era

Question 23

around 65 million years ago, the evolution of mammals, birds, insects, and flowering plants have proceeded.

Answer 23

Cenozoic era

Question 24

Mammals became the dominant species and the first evolved primates on the planet.

Answer 24

Cenozoic Era