Eras of Earth's History

When did the first organisms appear?

• 20-19 Million Years Ago

• 2016 Presidential Election

• 3-2 Years Ago

• 4-3.5 Billion Years Ago

Tags

NGSS.MS-LS4-1

During which Eon was Earth called "Snowball Earth"?

• Hadean

• Phanerozoic

• Proterozoic

• Archean

The most present eon continues to this day starting back about 540 million years ago. During this eon, organisms evolved and died in mass numbers, but also includes the start of human life. What is the name of this eon?

• Hadean

• Archean

• Phanerozoic

• Proterozoic

Tags

NGSS.MS-ESS1-4

In this eon multicellular life was created. During this eon the Earth was considered the Snowball Earth and the Oxygen Catastrophe occurred causing loss of oxygen on our Earth. This eon is also the 3rd eon in Earth’s history. Which eon is this?

• Archean

• Hadean

• Proterozoic

• Phanerozoic

The moon formed during this eon, this eon occured before life and before the crust had solidified. Lava and magma was everywhere, and lots of comets bombarded the earth, giving the earth the large amounts of water you see today. Which eon is this?

• Hadean

• Archean

• Proterozoic

• Phanerozoic

Tags

NGSS.MS-ESS2-2

The moon formed during this eon because a Mars sized planet glanced of the earth, sending some of the earth's top layers and some of this planet going into orbit around the earth, as many small asteroids, which eventually formed one mass of rock, the moon we see today. The moon now causes the tides, low tide and high tide. What eon is this?

• Hadean

• Archean

• Proterozoic

• Phanerozoic

Tags

NGSS.MS-ESS1-1

How are periods, eras, and eons related?

• Periods are the building blocks of all time. Two or more periods form an era. Two or more eras form a eon.

• Eras are the building blocks of all time. Two or more eras form an eon. Two or more eons form a period.

• Eons are the building blocks of all time. Two or more eons form a era. Two or more eras form an period.

Tags

NGSS.MS-ESS1-4

During which Eon did 96% of marine species as well as a similar amount of land animals perish that could’ve been caused by volcanic eruptions? (Hint: Called "The Great Dying")

• Phanerozoic

• Archean

• Hadean

• Proterozoic

Tags

NGSS.MS-LS4-1

What is the difference between the Precambrian and Cambrian time periods?

• Multicellular life formed at the start of the Cambrian time period.

• Multicellular life formed at the start of the Precambrian time period.

• There is no difference between the time periods.

• There is no Cambrian or Precambrian time period.

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

Which era is known as the "Age of Reptiles" and saw the dominance of dinosaurs?

• A) Paleozoic

• B) Mesozoic

• C) Cenozoic

• D) Precambrian