What caused Earth's crust to form?

Minerals in the Earth’s mantle released water trapped in them through lava explosions and the minerals that still contained water formed Earth’s crust.

Minerals in the Earth's mantle were heated by the high temperatures at the time and formed a dry, outer crust.

The mantle of the Earth released gasses trapped in it’s minerals which cooled into solid material and formed a dry crust.

The coloration in minerals in the Earth’s mantle was released through lava explosions onto the top of the Earth, making it brown.

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.

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.

What was the effect of Earth’s crust forming?

Plants were able to photosynthesize by getting minerals from the soil

Animals could build habitats to live in

What was the effect of "The Great Dying"?

Almost all organisms perished, which started the evolution of dinosaurs.

All organisms could now walk on land and swim in water.

Water was now more affordable for organisms in any area.

What most limits the study of the previous eons?

The rock cycle destroys evidence of the previous eons limiting our study of previous eons.

Due to mass extinctions, some species that we could've studied had gone extinct.

No evidence of previous eons are written down.

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.

What caused Snowball Earth?

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.

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.

Pbs Eons

Quiz

•

Science

•

7th Grade

•

Practice Problem

•

Hard

•

NGSS

MS-ESS1-4, MS-LS4-1, HS-ESS1-6

+11

Standards-aligned

Charles Martinez

FREE Resource

25 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When was the Earth Formed?

100 Years Ago

4.6 Billion Years Ago

2019 Years Ago

16.7 Million Years Ago

Tags

NGSS.MS-ESS1-4

NGSS.MS-ESS2-2

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the 4 Eons in order?

Hadean, Proterozoic, Archean, Phanerozoic

Hadean, Archean, Proterozoic, Phanerozoic

Archean, Hadean, Proterozoic, Present

Hadean, Archean, Proterozoic, Mealrozoic

Tags

NGSS.MS-ESS1-4

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

During which Eon was Earth called "Snowball Earth"?

Hadean

Phanerozoic

Proterozoic

Archean

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The Earth always had some oxygen.

True

False

Tags

NGSS.MS-LS1-6

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many years ago did the moon first form?

4.5 Billion Years Ago

3.2 Million Years Ago

10 Billion Years Ago

4.9 Billion Years Ago

Tags

NGSS.HS-ESS1-6

7.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

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

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Pbs Eons

25 questions

When was the Earth Formed?

What are the 4 Eons in order?

When did the first organisms appear?

During which Eon was Earth called "Snowball Earth"?

The Earth always had some oxygen.

How many years ago did the moon first form?

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?

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?

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?

In what eon did Earth’s crust form?

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