According to the geological time scale ____________________ evolved after the first insects evolved.

According to the fossil record, which of these evolved after amphibians? Select two options.

Which pair of elements can be used to determine the age of a fossil that is over one billion years old?

Compared to absolute dating, what is an advantage of relative dating?

Which conclusion is best supported by the diagram?

A scientist is using relative dating to determine the age of a fossil that she discovered.

What would allow her to draw the best conclusions about fossils that are younger than the one she discovered?

The diagram shows fossils buried in layers of sediment. Which statement is supported by the information in the diagram?

The diagram shows two different types of fossils from the same kind of ancient organism. Which labels complete the diagram?

Jonas drew a diagram to compare two types of fossils. Which label belongs in the area marked Z?

Which condition is necessary for a mold fossil to form?

How much time is needed to form most fossils?

Alex listed the typical steps of fossil formation.

1) An organism dies.

2) The remains fall to the bottom of the ocean.

3) The soft portions decay, and the hard portions remain.

4) The sediment becomes rock.

Which statement describes the missing step?

This fossil shows tunnels left after animals burrowed through the sediment.

Which statement best describes this fossil?

Compared to absolute dating, what is a disadvantage of relative dating?

Which statement best describes the fossil record?

Extrusions are formed by cooling magma beneath Earth’s surface.

Scientists are able to determine the relative age of rocks in specific years.

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 ____.

Gaps in rock layers are called ____.

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

A limestone bed containing fossils that are 550 million years old is ____ a bed of sandstone containing fossils that are 400 million years old.

In a series of undisturbed rock layers where shale lies between sandstone below and limestone above, the ____.

Rock layers are correlated if they both contain the same ____.

If a layer of sandstone lies on top of a layer of limestone in which a 300-million-year-old fossil is found, and there are no unconformities, the layer of sandstone must be ____.

a.c.b.d.

An unconformity is a ______ of rock.

The age of one rock layer compared to the age of another rock layer is its __________.

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

gaps in rock layers that develop when agents of erosion remove existing rock layers

Which principle states that, in undisturbed rock layers, the oldest rocks are on the bottom and the youngest rocks are on top?

If the same index fossils are found in two separate rock layers, the two rock layers most likely

Early land animals had gills as well as lungs.

Early land animals had to return to the water to reproduce.

The formation of the moon may have caused the Paleozoic extinction.

Cyanobacteria increased the levels of carbon dioxide in the atmosphere.

The Precambrian time period is the largest on the geological time scale.

The geological time scale is divided up and organized according to what life forms existed on earth.

Geologic events that occurred during the Paleozoic Era include mountain building and volcanic activity.

The development of ____ factored in the development of complex organisms.

A life-form in the Precambrian time was ____.

Life-forms that existed during the Paleozoic Era included ____.

Little is known about much of Earth’s early history because ____.

Animal life in the Paleozoic Era included all of the following EXCEPT ____.

The change in environments that may have occurred at the end of the Paleozoic Era may have been caused by ____.

The Precambrian time period is segmented into very few parts because:

What time period lasted for more than half of the hypothesized history of the Earth?

Scientists used major changes in life forms in the fossil record to form the geologic time scale.

Dog breeding is an example of natural selection.

The Paleozoic Era is the longest time period in the history of Earth.

Geologic time is divided into units based upon types of ____.

The longest subdivision in geologic time is a(n) ____.

Changes in the environment result in ____.

Which trilobite characteristic did not change through time?

Trilobites are index fossils because they ____.

Changes in the trilobite exoskeleton can be attributed to ____.

Plate tectonics may affect organic evolution because movement of plates may cause a change in ____.

__ on the geologic time scale are marked by major, striking, and worldwide changes in the type of fossils present.

The division of Earth’s history into smaller units makes up the ____.

If a species can adapt to a changing environment, or ____, its descendants will survive.

___ is a process by which organisms with characteristics suited to the environment will survive and reproduce.

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

Absolute age examines the position of rocks in a sequence.

The half-life of a radioactive material in a fossil increases with the size of the fossil.

Radiocarbon (or carbon 14) dating is used to measure the age of fossils up to 50,000 years old.

The clock on a rock is set as soon as it begins to erode.

Isotopes of the same element will have a different number of neutrons, but the same number of protons and this is important in understanding radiometric dating.

____ dating uses the properties of atoms in rocks and other objects to find their ages.

With ____ dating, a rock's exact age can be determined, whereas with ____ dating, a rock's age is compared to the ages of other rocks.

Fossils up to 50,000 years old can be dated with ______.

_____________________ is measured in half-lives.

the process in which one of an isotope's neutrons breaks down into a proton and an electron and the electron leaves the atom as a beta particle

Half-life is the time it takes for half of the atoms in an isotope to decay.

________________________ is the process of calculating the absolute age of a rock by measuring the amounts of parent and daughter materials in a rock and by knowing the half-life of the parent

The process of isotopes breaking down and emitting particles, such as alpha or beta, to form a new substance.

____________________________ states that Earth processes today are similar to those that took place in the past

While examining layers of rock, a geologist states, “The sandstone is older than the limestone.” What has the geologist determined?

Which kind of dating can be used to determine the exact age of the rock and which kind of radiometric dating is used to compare the ages of rocks?

When radiometric dating is done on a rock sample, the rock’s ____________age sequential age is determined.

Nonconformities occur when sedimentary rocks are deposited on top of uplifted and eroded metamorphic or igneous rocks.

Scientists are able to determine the relative age of rocks in specific years.

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

Gaps in rock layers are called ____.

The three types of unconformities are angular unconformities, nonconformities, AND disconformities.

Rock layers are correlated if they both contain the same ____.

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

Which principle states that, in undisturbed rock layers, the oldest rocks are on the bottom and the youngest rocks are on top?

If the same index fossils are found in two separate rock layers, the two rock layers most likely

Scientists used major changes in life forms in the fossil record to form the geologic time scale.

The Paleozoic Era is the longest time period in the history of Earth.

Geologic time is divided into units based PRIMARILY upon types of ____.

The longest subdivision in geologic time is a(n) ____.

Changes in the environment result in ____. (Choose the BEST answer.)

Trilobites are index fossils because they ____.

Plate tectonics may affect organic evolution because movement of plates may cause a change in ____.

____ on the geologic time scale are marked by major, striking, and worldwide changes in the type of fossils present.

____ is a process by which organisms with characteristics suited to the environment will survive and reproduce.

The half-life of a material increases with the amount of material present.

While examining layers of rock, a geologist states, “The sandstone is older than the limestone.” What has the geologist determined?

Early land animals had gills as well as lungs.

Early land animals had to return to the water to reproduce.

Cyanobacteria increased the levels of carbon dioxide in the atmosphere.

The geological time scale is divided up and organized according to what life forms existed on earth.

The geologic time periods from longest to shortest is:

We are living in the ______________________ era.

The longest Era in Earth's History is the ______________________ era and it includes the Earth's history up to 600 million years ago.

Geologic events that occurred during the Paleozoic Era include mountain building and volcanic activity as a result of plate tectonics.

The development of ____ factored in the development of complex organisms.

A life-form, and the first known life-form in the Precambrian time was ____.

Life-forms that existed during the Paleozoic Era included ____.

Little is known about much of Earth’s early history because ____.

Animal life in the Paleozoic Era included all of the following EXCEPT ____.

The change in environments that may have occurred at the end of the Paleozoic Era may have been caused by ____.

The Precambrian time period is segmented into very few parts because:

What time period lasted for more than half of the hypothesized history of the Earth?

Changes in the trilobite exoskeleton can be attributed to ____.

The Precambrian time period is the largest on the geological time scale.

Dinosaurs were definitely cold blooded.

Dinosaurs existed during the____________________ era.

__________________ or seed-bearing plants, were the only abundant form of plant life during the Mesozoic Era.

The breakup of Pangaea resulted in warm, wet global climates.

During the Mesozoic Era, Pangaea separated into ______.

Mammals first appeared during the ________________

The mass extinction at the end of the Mesozoic Era was caused by ______.

Flowering plants are ______.

The Cenozoic was a time of _______.

Which of the following appeared during the Mesozoic Era?

Which of the following statement describes dinosaurs during the Mesozoic era?

Most mammals during the Mesozoic were

Seed-bearing plants are also referred to as Angiosperms and

From Oldest to most recent the history of Earth is divided into the following time periods:

If a student misses questions on a quiz, he/she should write down the full question missed, and go back and review the lesson material to find the correct answer, before taking the quiz again.