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How would a biologist BEST determine the reason for extinction of a species?
missing layer of rock
Radioactive Dating
the oldest layer is on the bottom and the youngest layer is on the top
They correlate the existence of life on Earth with geological events.
examine fossils of plants and animals in different rock layers to see how these organisms have chang
The island drifted from a tropical region to its present location.
The climate of Alaska was warmer in the past than it is today.
The area was once covered by water.
In what way does the law of superposition show geological evolution?
missing layer of rock
Radioactive Dating
the oldest layer is on the bottom and the youngest layer is on the top
They correlate the existence of life on Earth with geological events.
examine fossils of plants and animals in different rock layers to see how these organisms have chang
The island drifted from a tropical region to its present location.
The climate of Alaska was warmer in the past than it is today.
The area was once covered by water.
Scientists in Alaska discover fossils of several organisms that they know lived only in warm climates. What does this discovery tell them about the climate of Alaska in the past?
missing layer of rock
Radioactive Dating
the oldest layer is on the bottom and the youngest layer is on the top
They correlate the existence of life on Earth with geological events.
examine fossils of plants and animals in different rock layers to see how these organisms have chang
The island drifted from a tropical region to its present location.
The climate of Alaska was warmer in the past than it is today.
The area was once covered by water.
The process by which the age of a rock is determined by measuring the amount of radioactive isotopes present in the rock or rock sample
missing layer of rock
Radioactive Dating
the oldest layer is on the bottom and the youngest layer is on the top
They correlate the existence of life on Earth with geological events.
examine fossils of plants and animals in different rock layers to see how these organisms have chang
The island drifted from a tropical region to its present location.
The climate of Alaska was warmer in the past than it is today.
The area was once covered by water.
Fossils of warm-weather plants were found on an island in the Arctic Ocean. What can best be concluded from this discovery?
missing layer of rock
Radioactive Dating
the oldest layer is on the bottom and the youngest layer is on the top
They correlate the existence of life on Earth with geological events.
examine fossils of plants and animals in different rock layers to see how these organisms have chang
The island drifted from a tropical region to its present location.
The climate of Alaska was warmer in the past than it is today.
The area was once covered by water.
What is the BEST example of an unconformity?
missing layer of rock
Radioactive Dating
the oldest layer is on the bottom and the youngest layer is on the top
They correlate the existence of life on Earth with geological events.
examine fossils of plants and animals in different rock layers to see how these organisms have chang
The island drifted from a tropical region to its present location.
The climate of Alaska was warmer in the past than it is today.
The area was once covered by water.
Which best explains how geologic time scales can help scientists study the evolution of life on Earth?
missing layer of rock
Radioactive Dating
the oldest layer is on the bottom and the youngest layer is on the top
They correlate the existence of life on Earth with geological events.
examine fossils of plants and animals in different rock layers to see how these organisms have chang
The island drifted from a tropical region to its present location.
The climate of Alaska was warmer in the past than it is today.
The area was once covered by water.
A layer of marine fossils is discovered in a desert environment. Which hypothesis best explains the discovery?
missing layer of rock
Radioactive Dating
the oldest layer is on the bottom and the youngest layer is on the top
They correlate the existence of life on Earth with geological events.
examine fossils of plants and animals in different rock layers to see how these organisms have chang
The island drifted from a tropical region to its present location.
The climate of Alaska was warmer in the past than it is today.
The area was once covered by water.
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