Earth's History and Evolution

Ecosystems with a larger number of species would be:

The most biodiverse ecosystem would be:

Which species on this chart are most closely related?

Why did Darwin's finches adapt/evolve over time?

Species which are related tend to have...

Which idea states that Earth's changes have been mostly due to sudden, catastrophic events?

A fossil has 25% parent isotope left. If the half life is 2500 years, how old is the fossil?

Natural selection usually occurs....

Which of the following time intervals is the smallest?

Who was the man who came up with the theory of continental drift?

Which of these would be a very sudden change for Earth's surface?

Which of the rock layers shown is the oldest?

What was Pangaea?

How does continental drift ACTUALLY occur?

The earliest fossils tend to be more ____ than more recent fossils.

A fossil has 50% of parent isotope left. If the half life is 500years, how old is the fossil?

Which is not a purpose of studying fossils?

Dinosaurs and cavemen were alive at the same time.

Which of these would be a gradual change on Earth's surface?

Evolution can be defined as:

How old is the Earth, according to scientists?

Which factor does not lead to genetic variation?

Which of the following best describes seafloor spreading?

Each of these different species have evolved over time from what?

What happens as new seafloor is created?

Based on the crosscutting principle, which rock layer is the youngest?

What is speciation?

Which idea states that Earth's changes have been mostly gradual, but sometimes sudden?

The man who came up with the idea of seafloor spreading was _____?

Structures like these, which appear similar across different species, are called what?

What is the theory of natural selection?

Which of the following periods did dinosaurs not exist in?

A rock was found with 75% product isotope. With a half life of 30 years, how old is the rock?

What does "The present is the key to the past" mean?

How did Wegener ORIGINALLY believe continental drift occurred?

Where is the newest-created seafloor usually found?

Some structures, like tailbones, are left over from our ancestors. What are they called?