The Oceans formed from: (may have to pick more than one)

Which of the following helps to date the age of the earth?

What is the arrow showing?

What was created from volcanic activity, radioactive decay & collisions of meteorites/comets.

What is the longest time unit in the geologic time scale, that is measured in billions of years?

Means "middle life" and last 2% of geologic time

A layer of rock or sediments whose absolute age can be determined and is used to help determine ages of rock layers over vast distances.

The oldest known mineral on Earth that is 4.2 billion years old.

This means "recent life" and takes up 1% of geologic time.

Horizontal layers that were eroded and then new horizontal layers were deposited on top of the eroded layers.

A trace fossil of waste that helps determine what the organism was eating & the environment around it.

The only atmosphere that contained huge amounts of oxygen & ozone gas.

These help to determine age of object and show an annual change in climate (dark in the summer, light in the winter)

The numeric age of an object or event, that is usually determined by radiometric dating

Which of the following is not a requirement for being an index fossil

A fault or intrusion is ALWAYS younger than the rock layers that it cuts through.

Matching layer of one outcrop of land to another in a different geographic regions by fossils, types of rocks, or minerals.

Animals that get stuck into a pool of tar at earth's surface is an example of what?

Means ancient life and lasted 7% of geologic time.

Preserved remains or evidence of an ancient organism.

Tilted or folded strata that have been eroded and horizontal layers are deposited on top of the eroded layers.

A science dealing with prehistoric life through the study of fossils.

Made up of hydrogen and helium, and was lost into space due to solar winds, heat and impacting objects.

The standard method used to divide Earth's long natural history into manageable parts.

Yearly sediment layer deposits from glaciers that helps determine age. (dark in the winter, & light in the summer)

Yearly rings that help determine age and tell about the climate conditions during that season/year. (light and thick in summer, dark and think in winter)

Sedimentary rock layers are deposited in horizontal layers.

The half life of carbon -14

This is used to date organic fossils up to around 80,000 years old.

Current geologic processes that shape the earth today are the same geologic processes that have shaped the earth in the past.

Sediment layer that serves as a time marker in the rock record and helps determine age of other layers. (Examples, volcanic ash, meteorite impact debris, coal)

An ordered arrangement of rock layers that is based on the relative ages of the rocks and in which the oldest rocks are at the bottom and the youngest at the top,

Science of comparing annual growth rings of trees to determine dating and events in Earth's history.

Which of the following did not help to determine the age of the earth?

What is the order of rock layers from oldest to youngest?

This picture shows what?

Process of a planet separating into layers because of density.

Second longest time unit of geologic time that is broken down into million of years.

The process of measuring of absolute age of geologic material by comparing the ratios of parent element to daughter element.

Elements changing into new elements through the ejection of radioactive particles.

Fossils that have gone through a chemical change.

Bacteria that can carry out photosynthesis.

A mass of igneous rocks that formed from magma, when it was injected into rock layers and then cooled and crystalized.

A type of fossil formed when a shell or other hard parts of an organism dissolves, leaving an empty space in the shape of the part/organism.

Hardened tree sap that is usually a source of insect fossils is an example of what?

If 10 mg of iodine 131 is given to a patient, how much of the daughter element is there after 24 days? The half-life of iodine-131 is 8 days.

The diagram shows 32 atoms.

16 of the Red are parent isotopes

16 of the Green are daughter isotopes

How many half-lives have occurred?

hardened tree sap, often the source of insect fossils is known as _____.

The process of minerals replacing the organic matter.

A break or crack in the earth's crust.

An atom that has the same number of protons but different numbers of neutrons which affects it's mass.

What is the bold line showing

A fossil that is a copy of an organism's shape that is formed when minerals fill in a mold.

Fossils that have not gone through any type of chemical change when being preserved.

The age of the earth.

Age that is determined by comparing one layer or fossil to another by their position.

What are the arrows showing

Which of the following environmental factors will not create an original preservation organism?

Has no alternate name and lasts 90% of geologic time. Finding fossils during this time is extremely rare.

Large mats or mound of cyanobacteria.

Smallest unit of geologic time that divides up periods. Only found in the Cenozoic due to excessive fossil record.

Digestive stone found in dinosaurs.

indirect evidence of life preserved in rock that doesn't contain any direct fossil of the organism.

Length of time for half of the radioactive atoms in a sample to decay.

Which layer is OLDER? Intrusion M or Layer D?

A whale bone that originally contained 200 grams of radioactive carbon-14 now contains 25 grams of carbon-14. How many half-lives have passed since this whale was alive?

Compared to the length of time for the first half-life of a sample of a radioactive isotope, the length of time for the second half-life is

This diagram represents a sample of ⁸⁷Rb. Which diagram represents the correct proportion of ⁸⁷Rb to its decay product, ⁸⁷Sr, after two half-lives?

This graph shows the relationship between mass and time for a radioactive element during radioactive decay. What is the half-life of the element?

This graph shows the relationship between mass and time for a radioactive element during radioactive decay. What fraction of the daughter element is left after 250x 10^9 years?

Fossils are only found in _________.