A Trip Through Time (Pendleton)

Which makes a good index fossil?

What happens when an organism fails to adapt?

Which method provides the most accurate age of a rock sample?

Certain fossils are used to dtermine the age of rock layers. Which type of fossil is best?

The fossils of organisms that were widely distributed but only lived for a short period of time

Earth's atmosphere, oceans, and continents began to form during

Which is most likely to provide information about the Earth's past climates?

Precambrian Time, which includes most of Earth's history, began with

This type of fossil can provide evidence for individual, family behavior, or social behavior.

What information can scientists gather from ice cores?

The Paleozoic, Mesozoic, and Cenozoic are divisions in the geologic time scale called

The process by which all the different kinds of living things have changed over time is called

What evidence must be carfully examined to determine that organisms changed over time?

What can fossil pollen in an ice core tell you about the past?

What method fo scientists most often use to determine the age of Earth?

The Mesozoic Era is divided into the Triassic, Jurassic, and Cretaceous. These are known as

Australian Zircon crystals estimated at 4.2 billion. Which statement describes period it formed

A scientists finds Trphite fossils. According to the chart, what era and period was it?

Why are fossils commonly found in sedimnetary rocks but not igneous rock?

The Cenozoic era is often called the Age of the

What's the benefit of using the superposition/index fossils instead of radiometric dating?

Life on Earth has changed over time. Scientists have found that older rocks contain fossils of

The most recent rocks of the Grand Canyon formed during which geologic period?

Some 600 yo sediments found below a rock layer. What would they most likely find above?

How do most fossils form?

Radioactive decay occurs when atoms of an unstable element

What type of rock most likely contains index fossils?

Which can scientists infer when they find marine fossils on top of mountains?

Scientists classify rock layers (top layer is most recent). Which law explains this?

Petrified palm trees in sedimentary rock near glaciers provides evidence of what?

Which characteristics of C14 dating helps determine approximate time a species became extinct?

Which best explains why the wing of a bat and the fin of a whale are similar?

What can be used to find the exact age of a rock specimen?

Time it takes for half of the radioactive atoms in a sample of radioactive element to decay

Which is the most accurate method scientists can use to estimate Earth's age?

Rich beds of marine fossils have been found in FL. By dating these fossils, scientists can?

The geologic time scale is a record of

During the Cambrian Explosion that began the Paleozoic Era, the many new forms of life

What can be concluded about the age of fossils in undistrubed rock layers?

What generally causes mass extinction?

Based on the fossil record, which organisms were most likely to have existed first?

Radioactive dating enables geologists to determine

Which best describes the ages of four undisturbed rock layers relative to one another?

Scientists conclude that forested ecosystems existed in Antarctica mya by studying?

Which evidence would best support the extinction of a past species?

Which isotope has been used most often to deterimine the age of fossils in the past 50,000 y?

Radioactive dating works best with what type of rocks?

The 1/2 life of K 40 is 1.3 bya. If found with 25% potassium 40, what's the absolute age?

Fossils of land dwelling mammals are found on 2 continents: What does the evidence suggest?

Where would fossilized evidence of unicellular (simple) organisms most likely be found?