WorksheetsGeologic Timeline
Total questions: 17
Worksheet time: 9mins
Geologic time
A line that appears in the surface of the Earth
Longest units of geologic time
History and Evolution of Life
Geologic Life on other Planets and the Moon
Eons
Little periods of time in History of Evolution
Longest units of geologic time
Eons are subdivided into smaller unit of time
Eras and Eons are the same periods of time
Eras
Different layers contain different fossils
Longest units of geologic time
The times that were very long like the ones when dinosaurs lived
Eons are subdivided into smaller unit of time
Fossil
Time boundaries based on what was observed in the Earth's rock layer
Different layers contain different fossils
Bones and flesh
Things that are very old underground
Changes in Fossils
Unicellular (One-Celled) organism much like present day bacteria90% of Earth's History
Abrupt changes in the type of fossils with the layers were observed organism that lived during that period of time suddenly disappeared. These changes did not occur at regular intervals of time, units ( Eon, Era, Period, epoch) are of unequal length.
Rock strata
Fossils that change very much because they were hidden underneath the surface
Mass Extinction
Is when all the mass disappear from the store
Is when the mass is not created or destroyed
It is when there's no more mass
Is the extinction of many species on Earth within a short period of time
Precambrian Period
Unicellular (One-Celled) organism much like present day bacteria90% of Earth's History
New types of multicellular life-formsComplex life-formMostly invertebrates- animal without backbone
65.5 Millions years ago until Present dayKnow about this era the most due to present fossils and rock recordsMountains BuildingsIce age-GlaciersMega-MammalsRise of Humans
Before plants were green and animals were big
Cambrian Period
Oldest of the Phanerozoic EonVery long-divided into 3 partsEarth's climate warmingVertebrates appear(animal with backbone)Age of fishMountain formation-PangaeaAmphibians-Fish-like organism that spent part of their lives on land
New types of multicellular life-formsComplex life-formMostly invertebrates- animal without backbone
When dinosaurs were not too tall, and they all were happy running around
DinosaursBreakup Of PangaeaSea levels riseCoal swamps formedTrees and plants sank into swamps and over million of years turned into coal70% of all life on Earth become extinctAppearance of mammals
Paleozoic Era
Dinosaurs dominated this period of time and they were vegetarians
No dinosaurs were allowed here
Oldest of the Phanerozoic Eon, very long-divided into 3 parts, Earth's climate warming, Vertebrates appear(animal with backbone) Age of fish, Mountain formation-PangaeaAmphibians-Fish-like organism that spent part of their lives on land
Organisms used to be very lazy during this period of time
Mesozoic Era
Humans used to hunt small dinosaurs and fish once a year
Abrupt changes in the type of fossils with the layers were observed organism that lived during that period of time suddenly disappeared. These changes did not occur at regular intervals so time unit( Eon, Era, Period, epoch) are of unequal length
This is known as the time of Different layers contain different fossils
Dinosaurs
*Breakup of Pangaea
*Sea levels rise
*coal swamps formed
*trees and plants sank into swamps and over million of years turned into coal
*70% of all life on Earth become extinct
*appearance of mammals
Cenozoic Era
65.5 Millions years ago until present day
*know about this era the most due to present fossils and rock records
*mountains buildings
*Ice age-glaciers
*mega-mammals
*rise of humans
When the romans fought against the cenozoic tribes
New types of multicellular life-formsComplex life-formMostly invertebrates- animal without backbone
The oldest Era, it goes back from when the solar system appeared for the first time
Most accepted theory about what happened when dinosaurs went extinct
An explossion ocurred because a volcano erupted
A massive ice age kill everything on Earth
An asteroid impacted the Earth in what we know now as the Yucatan peninsula
A meteorite impacted the Moon and that's why it has many craters
Why scientists are exploring Mars?
Because they want to see how hot it is
Because Mars is close and they are looking for liquid water and exploring its geologic history and therefore analyze the possibility of life on Mars
Because they don't have anything else to do
Because it's fun to have rovers moving remotely from Earth
How long approx takes Astronauts to travel to Mars and why there's variations in this time?
It takes between 6 and 9 months and it all depends on the trajectory of the planets and its movement
It takes years and that never will change
It takes between 9 and 10 years and thats crazy
Humans are never going to be on Mars surface
How long ago the asteroid that kill dinosaurs hit the Earth?
65 years ago
65 thousands years ago
65 billions years ago
65 millions years ago
For how long approx dinosaurs lived on Earth?
For approx 140 millions years
For 140 thousand years
For approx 120 thousand years
For approx 140 billion years
For how long approx modern Humans have been on Earth?
Millions of years
Humans hunted dinosaurs
Approx 120 thousand years
120 years
