History of Life on Earth

History of Life on Earth

Read each question carefully and answer to the best of your ability.

1. Which of the following provides the most direct evidence for the history of life on Earth?

2. The earliest forms of life on Earth were most likely:

3. The   is a timeline that organizes the Earth's history and the evolution of life.

4. The process by which organisms change over time in response to their environment is called  .

5. Explain how the discovery of fossils helps scientists understand the history of life on Earth.

Look at the image of the dinosaur skeleton below. This is an example of a fossil.

6. What kind of information can scientists learn about ancient life forms by studying fossils like this?

7. All life on Earth began at the same time.

8. The Earth's environment has remained unchanged throughout its history.