Geologic time

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

method used to determine the age of rocks by comparing rocks with younger and older rock layers

• extinction

• fossil record

• relative age

• geologic time scale

a fossil that is used to establish the age of a rock layer because the fossil is distinct, abundant, and widespread and the species that formed that fossil existed for only a short span of geologic time

• index fossil

• fossil record

• fossil

• relative age

The Death of every member of a species

• extinction

• Paleozoic era

• relative age

• Permian extinction

a historical sequence of life indicated by fossils found in layers of Earth's crust

• fossil

• geologic time scale

• species

• fossil record

What type of rock do fossils form in?

• Igneous
• Sedimentary
• Metamorphic
• Classic

The Geologic Time Scale is a record of what?

• old geologists
• sweet geology music
• the known history of rocks and fossils
• a list of every living thing ever

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

What is a large ancient landmass?

• Pangaea
• Cyanobacteria
• Africa
• Jumanji

The Law of Superposition states

• Younger rocks layers are on top of older rock layers

• Fossils are found in sedimentary rocks

• Older rock layers are on top of younger rock layers

• Absolute age dating