Fossils and Geological Time Flashcard

Front

Most fossils form when organisms that die become buried in sediments.

Back

True

Front

By determining the age of fossils, scientists can reconstruct the history of life on Earth.

Back

True

Front

In layers of sedimentary rock, the _________ layer is usually at the bottom. Each higher layer is _________ than the layers below it.

Back

oldest, younger

Front

The millions of fossils that scientists have collected are called

Back

The Fossil Record

Front

How do these rock formations support the idea that Earth has changed due to natural processes?

Back

It has changed because of Erosion

Front

The Law of Superposition states that

Back

the older layers of rock are at the bottom

Front

How to determine the age of layers from two different locations?

Back

We can compare the fossils found in the layers of one location to the fossils in the other location.

Front

Why may fossil of the same organism be found on different continents?

Back

Because the continents were once together

Front

Which statement is correct?
Options:

• Layer 2 is younger than layer 4
• Layer 1 is younger than layer 4
• Layer 2 is older than layer 1
• Layer 3 is younger than layer 1

Back

Layer 3 is younger than layer 1

Front

Which statement about the layers is incorrect?

• Layer 4 is younger than 3
• Layer 1 is older than 3
• Layer 4 is older than 2
• Layer 2 is older than 4

Back

Layer 4 is older than 2