Radioactive Relative Decay Dating Geologic Eons Eras Wildcard

Radioactive Relative Decay Dating Geologic Eons, Eras Wildcard & Epochs Time 100 100 100 200 200 200 300 300 300 400 400 400 500 500 500

Radioactive isotope that decays to Pb-206.

What U-238?

Process of determining age through comparison of radioactive isotopes.

What is radiometric/ absolute dating?

The unstable form of N-14.

What is C-14?

Half-life of U 238.

What is 4. 5 billion years?

Half-life of C-14.

What is 5730 years?

Geologic law stating that the oldest layer of sediment is always at the bottom of the strata.

What is the Law of Superposition?

The oldest rock layer

What is layer 4?

DAILY DOUBLE!!!

Fossils found exclusively in the rock layers of a particular geologic time.

What are index fossils?

An igneous intrusion is always younger than the rock it has cut across.

What the Principle of Cross-Cutting Relationships or Igneous Intrusions?

Process used to determine the sequence of a rock layer in relation to the sequence of other rock layers

What relative dating?

Why Cambrian rocks of Greenland, currently under an ice sheet, have fossils of tropical plants.

What is during that geologic time, the land of Greenland was closer to the equator?

Fossils from the Mesozoic era contain many of these organisms.

What are dinosaurs?

Extraterrestrial proof of the Permian extinction.

What are buckyballs?

Geologic time frames from smallest to largest.

What are epoch, period, era and eon

Extinction that ended the Mesozoic era.

What is the Cretaceous. Tertiary (K-T) extinction?

Radioactive isotope of carbon.

What is C-14?

DAILY DOUBLE!!!!

Period that ended with the extinction of all dinosaurs.

What is the Cretaceous period?

Why carbon dating is used to date fossils.

What is it has a short half-life and it’s used to date once living things?

Study of fossils.

What is Paleontology?

Earth’s geologic processes are the same now as in the past.

What is the Principle of Uniformitarianism?

The largest time frame: epoch, period, eon or era.

What is an eon?

Eon, era, period and epoch in which humans appeared.

What are the Phranerzoic eon, Cenozoic era, Quaternary period and Holocene epoch?

Three periods of the Mesozoic era.

What is Triassic, Jurassic and Cretaceous?

Era that means “recent life”.

What is Cenozoic?

Two eons.

What are Phranerzoic and Precambrian?