WorksheetsEras of Earth's History
Total questions: 15
Worksheet time: 15mins
What 2 pieces of evidence is most helpful in understanding events that occurred in Earth’s past?
Layers of Rock
Fossils
The Geologic Time Scale
Scientific Tools
What most limits the study of the previous eons?
Scientists can't time travel.
Due to mass extinctions, some species that we could've studied had gone extinct.
No evidence of previous eons are written down.
The rock cycle destroys evidence of the previous eons limiting our study of previous eons.
The Earth’s temperature became more even and cooled down. Water vapor formed oceans and the Earth was cool enough to form the first continent, Vaalbara. Oxygen was released into the atmosphere (Great Oxygenation Event) and the first life formed. What eon is this?
Archean
Hadean
Proterozoic
Phanerozoic
What is precambrian time and during which eons did it occur?
Precambrian time is the earliest parts of Earth's history which preceded the cambrian times. This time period occurred in the first three eons, the Hadean, Archean, and Proterozoic. Precambrian time represents about 80% of Earth’s geologic record.
Precambrian time is the latest parts of Earth's history which preceded the cambrian times. This time period occurred in the first three eons, the Phanerozoic, Archean, and Proterozoic. Precambrian time represents about 80% of Earth’s geologic record.
Precambrian time is the earliest parts of Earth's history which preceded the cambrian times. This time period occurred in the first three eons, the Phanerozoic, Archean, and Proterozoic. Precambrian time represents about 80% of Earth’s geologic record.
Precambrian time is the latest parts of Earth's history which preceded the cambrian times. This time period occurred in the first three eons, the Phanerozoic, Meaterozoic, Winsterozoic. Precambrian time represents about 80% of Earth’s geologic record.
What was the effect of snowball earth?
It started the evolution of the first complex animals. The first complex organisms, weird tube- and frond-shaped things called the Ediacarans, appeared soon after.
It allowed snow angels to be made by complex organisms.
Hot Chocolate was created because of snowball Earth because it was called and organisms wanted a treat.
There was no effect.
There was a time period that occurred approximately 716 million years ago and covered the earth completely in ice and created very cold temperatures on earth. What is the scientific name of this event?
Snowball Earth
Cold Earth
Snowball Planet
Frozen Earth
What caused Snowball Earth?
An invasion of snowmen from an outside planet covered the Earth in Snow that took millions of years to melt.
No Organisms Heaters were working, so everything was cold.
Earth’s Atmosphere failed to keep the planet warm, causing cold space temperatures to leak into Earth’s surface.
Snowball Earth was caused by the rapid weathering of Earth’s continents. This sucked carbon dioxide out of the atmosphere leading to major drops of temperature.
When was the Earth Formed?
100 Years Ago
4.6 Billion Years Ago
2019 Years Ago
16.7 Million Years Ago
What are the 4 Eons in order?
Hadean, Proterozoic, Archean, Phanerozoic
Hadean, Archean, Proterozoic, Phanerozoic
Archean, Hadean, Proterozoic, Present
Hadean, Archean, Proterozoic, Mealrozoic
Which era is known as the 'Age of Reptiles'?
Paleozoic
Mesozoic
Cenozoic
Proterozoic
During which era did mammals become the dominant land animals?
Paleozoic
Mesozoic
Cenozoic
Archean
What major event marks the end of the Mesozoic era?
The Permian-Triassic extinction
The Cretaceous-Paleogene extinction
The Cambrian explosion
The Great Oxygenation Event
Which era is characterized by the development of early life forms such as bacteria and algae?
Hadean
Archean
Proterozoic
Phanerozoic
What is the primary method used to date the age of rocks and fossils from different eras?
Carbon dating
Radiometric dating
Dendrochronology
Thermoluminescence
Which era is known for the explosion of life forms, including the first appearance of most major animal phyla?
Proterozoic
Cambrian
Ordovician
Silurian
