If the same types of fossils are found in two separate rock layers, it's likely that the two rock layers ____.

are part of one continuous deposit

formed under different conditions

If the same sequence of rock layers is observed over a large area, ____.

a large deposit of rock formed over a large area

conditions of formation were probably very different

Trilobites are index fossils because they ____.

lived over large areas of the world

exhibit specific characteristics

Which of the following is NOT a fossil?

old stone tools found in a cave

baby mammoth found in a glacier

outline of a fern found in a rock

In an area of sedimentary rock layers, the bottom rock layers show organisms that lived in the ocean. The land is currently on a mountain top. What can we conclude from this information?

The ocean once covered this area.

The Earth’s surface has changed over time.

The organisms living in the ocean had to adapt or change in order to survive.

Patterns in the fossil record .....

Provide support for the theory of evolution

Show us that while landforms might change, climate has remained unchanged over millions of years.

Show that most organisms have stayed the same over the last million years.

Fossils are the ____, imprints, or traces of once-living organisms preserved in rock.

A ___ may tell a geologist when, where, and how an organism lived.

A ___ is the cavity left behind in the rock after an organism's hard part has dissolved.

The ___ parts of organisms are most likely to become fossils.

An unconformity is a ___ of rock.

Preserved animal tracks are called ___ fossils.

Fossils up to 75,000 years old can be dated with ___.

Fossil formed when an outline of the original organism is formed from left-over carbon.

made when sediments fill in a cavity made when an object decayed and the sediments harden into rock.

the time it takes for half of the atoms in an isotope to decay.

fossils of species that lived on Earth for short periods of time and were abundant and were widespread geographically.

States that for undisturbed rocks, the oldest rocks are on the bottom and the rocks become younger and younger toward the top.

hollow places in rock made when an organism died and was buried and holes in the rock let air or water reach it and dissolve the organism.

a process that uses the properties of atoms in rocks and other objects to find their ages.

the order of events and the relative age of rocks is determined by examining the position of rocks in a sequence

Fossils and Geologic Time

Authored by Tracy Leonard

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8th Grade

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Fossils most often form when a dead organism is buried in sediments.

True

False

Tags

NGSS.MS-LS4-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Carbon films are formed when a thin film of carbon is left, forming a silhouette of the original organism.

True

False

Tags

NGSS.MS-LS4-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Dinosaur footprints are original remains

True

False

Tags

NGSS.MS-LS4-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

To be a useful index fossil, a species must have been rare.

True

False

Tags

NGSS.MS-LS4-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Radiocarbon dating, would be useful in dating the age of the Earth.

True

False

Tags

NGSS.MS-ESS1-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Index fossils are the remains of species that existed on Earth for relatively short periods of time.

True

False

Tags

NGSS.MS-LS4-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Absolute age examines the position of rocks in a sequence.

True

False

Tags

NGSS.MS-ESS1-4

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Fossils and Geologic Time

Fossils most often form when a dead organism is buried in sediments.

Carbon films are formed when a thin film of carbon is left, forming a silhouette of the original organism.

Dinosaur footprints are original remains

To be a useful index fossil, a species must have been rare.

Radiocarbon dating, would be useful in dating the age of the Earth.

Index fossils are the remains of species that existed on Earth for relatively short periods of time.

Absolute age examines the position of rocks in a sequence.

All of the following conditions help preserve organisms as fossils EXCEPT ____.

If the same types of fossils are found in two separate rock layers, it's likely that the two rock layers ____.

Determining the order of events and the relative age of rocks by examining the position of rocks in a sequence is called ____.

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