Earth History Test Review

Front

What type of unconformity is characterized by sedimentary rock on top of igneous rock?

Back

Nonconformity

Front

Which particle in the nucleus determines the type of element an atom is?

Back

Proton

Front

What is the unstable parent product that turns into the daughter product to determine the age of Zircon grains?

Back

Uranium turns into Lead.

Front

What must be true about the age of a fault compared to the rock layers it cuts through?

Back

The fault must be younger than the rock layers.

Front

What type of fossil is formed when a mold is filled with a different type of sediment?

Back

Cast fossil.

Front

Define unconformity in geological terms.

Back

An unconformity is a surface of contact between two groups of unconformable strata.

Front

What is the significance of Zircon grains in geology?

Back

Zircon grains are used to date the oldest rocks on Earth.

Front

Explain the difference between a mold and a cast fossil.

Back

A mold fossil is an impression of an organism, while a cast fossil is a replica formed when sediment fills the mold.

Front

What is the role of protons in an atom?

Back

Protons determine the atomic number and identity of an element.

Front

What is the process of radiometric dating?

Back

Radiometric dating measures the decay of radioactive isotopes to determine the age of rocks and fossils.