Geologic Time and Rock Dating Unit Test

Front

A layer of rock strata that can be easily distinguished by sight and traceable over a wide area. Examples include coal beds, beds of volcanic ash, and iridium.

Back

key beds

Front

Scientists use ______ dating to figure out the exact age of something.

Back

absolute

Front

Dinosaurs lived in the ___________ era.

Back

Mesozoic

Front

Order of Geologic time from largest to smallest.

Back

Eons - Eras - Periods

Front

A scientist who studies fossils is called a what?

Back

Paleontologist

Front

A bug stuck in amber is an example of what type of fossil? Options: cast, mold, trace, preserved remains

Back

preserved remains

Front

What type of fossil is this? Options: Mold, Cast, Preserved remains, Trace fossil

Back

Cast

Front

According to the fossil record, which fossil is the oldest? Options: fossil 5, fossil 2, fossil 3, fossil 4

Back

fossil 5

Front

If a sample contains 100g of a radioactive isotope, how much will be left after 3 half lives?

Back

12.5g

Front

What are the relative ages of the features in order from oldest to youngest? Options: Limestone, Basalt, Fault, Siltstone, Siltstone, Fault, Basalt, Limestone, Limestone, Fault, Basalt, Siltstone, Limestone, Siltstone, Fault, Basalt

Back

Limestone, Siltstone, Fault, Basalt