Chapter 7: The Age of the Earth

Who is the geologist who came up with the principle of uniformitarianism?

Tells you how old something is when compared to something else.

Isotopes are atoms that have the same number of protons, but a different number of ______

Scientists use this to find the age of rocks and objects that are very old.

Uniformitarianism states that...

Which of the following is NOT a step in forming sedimentary rock?

What type of rock is formed when a rock is put under extreme pressure or heat?

What type of rock is formed from tiny particles compacted from the erosion of other rocks?

The principle that sedimentary layers on the bottom were deposited before layers on the top.

The series of processes that make and change rocks is the...

True or false: erosion can wear down mountain ranges

The compaction and cementation that changes sediments into rock is called...

What type of rock is produced when magma solidifies?

Which type of rock is used most often with radiometric dating?

The time it takes for a radioactive isotope to decay to half its original mass is called...

True or false: the Earth is over 4 billion years old