Geologic History

The presence of many marine fossils in Virginia is evidence that

• Virginia is very old
• Virginia is not very old
• Virginia was once covered by water
• Virginia was home to many dinosaurs

Which organism appeared first?

• Fish

• Humans

• Cyanobacteria

• Jellyfish and Corals

During which era/eon do humans live in?

• Cenozoic
• Pre-Cambrian
• Paleozoic
• Mesozoic

Which type of dating gives us the age of an item in exact years?

• Radioactive or Absolute
• Relative

Looking at the diagram, which layer is the oldest?

• dolomite
• limestone
• basalt
• beach sand

How old do Paleontologists believe the Earth is?

• 2019 years old

• 3.6 billion years old

• 4.6 billion years old

• 4.6 million years old

Which type of dating method can be used on rock layers by applying the Law of Superposition?

• relative dating

• absolute dating

• carbon dating

• radiometric dating

Relative dating of rock layers tells us that the deeper we dig, _______.

• the younger the rocks get
• the smellier the rocks get
• the harder the rocks get
• the older the rocks get

According to the law of superposition, which layer is the youngest?

• A
• B
• C

How long in a geologic time period? 

• 3 million years
• 4.6 billion years
• a period doesn't have an exact length
• they are all the same length