Look at the fossilized piece of a plant below.

To which type of plant is this fossilized organism most likely related?

The picture on the left shows a fossil of the head of the prehistoric creature, Deinotherium. The picture on the right shows an artist's sketch of what the creature may have looked like.

Based on the sketch, what type of modern animal is Deinotherium related to?

There have been many fossils found throughout North America. Most of these fossils are of organisms that lived millions of years ago. Among these are ferns. Ferns were plants with several small leaves along their stems and no seeds or flowers.

Which of the following is most likely a living relative of the fern?

In what way are these two fossils similar?

The picture below is a fossil of an insect.

The insect is probably related to the

What is the best way that scientists can learn what the Earth's atmosphere was like millions of years ago?

What can scientists learn by studying fossils?

I.how the Earth's surface has changed over time

II.the appearance of an organism and its structures

III.how species have changed over time

IV.how the Earth's climate has changed over time

The picture below is a fossil from around 500 million years ago.

The animal shown is probably related to the modern

The pictures below show the fossil remains of two different animals.

In what way were these animals probably similar?

A scientist recently found the fossilized remains shown below. He identified them as the prehistoric organism Palaeobatrachus.

Palaeobatrachus resembled the modern _______.

The picture below is a fossil of an insect.

The insect is probably related to the

On the left is a fossil of an extinct organism called the ammonite. On the right is an artist's drawing of what the ammonite probably looked like. What organism alive today is most likely related to the ammonite?

What information do fossils provide about plants and animals?

A fossil of a pterodactyl is shown below.

Which of these modern animals has a body structure that is most similar to a pterodactyl?

The picture below shows a fossil that is about as large as the palm of a hand. This fossil is about 3 million years old. It is what remains of a shell that spiraled inward like a coil and was hollow on the inside.

How was the animal that lived inside of this shell probably different from a snail you might find in your backyard?

By studying fossils, scientists have learned that

The picture below is a fossil of a tooth that may be from a sea creature known as the megalodon.

The megalodon is probably related to the

Which of these is something that fossils can reveal?

Look at the fossil below.

The organism that made this ancient footprint is likely related to modern _______.

Look at the fossilized remains shown below.

What type of organism did these remains come from?

Modern birds have feathers that help them fly. Fossils of the ancient creature Archaeopteryx show that it had feathers and a body that was similar in shape to some modern birds.

Which statement results from comparing Archaeopteryx fossils to similar, modern creatures?

Look at the fossil below.

What type of organism did this fossil likely come from?

The fossil below is perhaps as old as 70 million years.

Which modern organism is most similar to this fossil?

Scientists think that millions of years ago, the Earth's atmosphere had more carbon dioxide and that it did not have enough oxygen for animals to breathe.

What evidence would support this idea?