An unconformity is a(n)...

Layer of rocks with unusual fossils

Remains of traces of prehistoric life

Oldest layers of rock in a regiion

Living creatures with habitats in or around rock

Objects that people of long ago left behind as artifacts

Index fossils allow geologists to...

Match rocks of the same age in different regions

Determine the exact age of rocks

Determine why some organisms became extinct

Identify organisms that did not leave fossil evidence behind

What event occurred 544 million years ago to cause the start of the Phanerozoic Eon?

Mass extinction of life on Earth

What event happened about 65 million years ago to cause the end of the Mesozoic Era?

Unicorns existed for 24.854 hours

What can organisms do to prevent, or slow own extinction

Start fulfilling their bucket lists

Rocks record geological events and...

Earth's Circumference and diameter in the past

The geological processes that shape Earth's features today

Basically the same today as they were in the geological past

Are much different from those of thousands of years ago

Did not operate in the distant past

Became important only several hundred years ago

What purpose do geologists use relative dating for?

To determine which rock layer in a canyon wall formed first

To fine the age of a rock layer

To determine how a rock's composition has changed over time

To identify past life forms that once lived in a rock layer

According to the principle of cross-cutting, an intrusive rock body is...

Younger than the rocks it intrudes into

Deposited as sedimentary layers

Always made of the same materials as the rock around it

Older than the rocks it intrudes into

Periods where deposition stopped and erosion took over

Periods where erosion stopped and deposition took over

A period where uplifting and tilting of rock ended

Period of time that is well documented with fossil evidence

The principle of fossil succession states that different types of fossil organisms

Succeed one another in a different order

Are older in the deepest layers of rock

Generally leave behind had parts

Occur most often in sedimentary rock

Phanerozoic Eon

Authored by Sierra Heywood

Science

7th - 8th Grade

NGSS covered

Used 16+ times

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53 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which Era was dominated by dinosaurs?

Cenozoic

Mesozoic

Paleozoic

Pangaea

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What period did the earliest flowering plants begin in?

Jurassic

Cretaceous

Permian

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Humans are a part of which era?

Cenozoic

Paleozoic

Mesozoic

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Geologists have divided Earth's history into manageable units that represent the...

Fossil time scale

Geographical time scale

Geological time scale

Precambrian time scale

The largest expanse of time on the geological time scale is the...

Eon

Era

Period

Epoch

Which eon of the geological time scale means "visible life"?

Hadean

Phanerozoic

Archaean

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The era of "ancient life" is known as the...

Cenozoic

Precambrian

Paleozoic

Mesozoic

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Phanerozoic Eon

Which Era was dominated by dinosaurs?

What period did the earliest flowering plants begin in?

Humans are a part of which era?

Geologists have divided Earth's history into manageable units that represent the...

The largest expanse of time on the geological time scale is the...

Which eon of the geological time scale means "visible life"?

The era of "ancient life" is known as the...

Which of the following is NOT an era of the Phanerozoic Eon?

What scientist is credited with proposing the principle of unifortarianism?

The dating process that places geologicall events in proper sequence is referred to as...

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