Worksheets7th Science: Unit 3 'Our Earth'
Total questions: 14
Worksheet time: 8mins
Select the correct sequence of the four eons of the Earth's history.
Hadean eon, Archean eon, Proterozoic eon, Phanerozoic eon.
Phanerozoic eon, Hadean eon, Proterozoic eon, Archean eon
Hadean eon, Archean eon, Phanerozoic eon, Proterozoic eon.
Proterozoic eon, Phanerozoic, Hadean eon, Archean eon
Select ALL the weather conditions.
Select the correct eon:
* The whole Earth was hot and there were many volcanos.
Hadean eon
Phanerozoic eon
Archean eon
Proterozoic eon
Select the correct eon:
* The continents we know today were formed
Hadean eon
Phanerozoic eon
Archean eon
Proterozoic eon
Select the correct eon:
* Oxygen built up in the Earth's atmosphere
Hadean eon
Phanerozoic eon
Archean eon
Proterozoic eon
Select the correct eon:
* 542 million years ago, the first uni-cellular and micro-organisms appeared
Hadean eon
Phanerozoic eon
Archean eon
Proterozoic eon
Dinosaurs were the dominant animal group in the ...................... era.
Cenozoic
Paleozoic
Mesozoic
Microorganisms _________ into more complex organisms.
evolved
adapted
competition
Life started in the Phanerozoic eon, around 542 millions years ago.
TRUE
FALSE
The first animals (living things) appeared on the oceans and seas.
TRUE
FALSE
......... was a supercontinent, which has separated to become the continents we know today.
Pangea
Competition
Era
Mesozoic
Hadean eon
A period is divided into eras.
TRUE
FALSE
An era is divided into eons.
TRUE
FALSE
Life started in the Archean eon, around 542 million years ago.
TRUE
FALSE
