Name ___________________________ Date __________

History of Life WorksheetTrue and False____ 1. Earth is thought to have formed about 4.6 billion years ago.____ 2. The conditions on primitive Earth were very suitable for life.____ 3. The first organisms appeared on land between 3.9 and 3.4 billion years ago.

4. What is the fossilization?

5. What evidence does the fossil record provide?

6. What are the two techniques paleontologists use to determine the age of fossils?

7. Explain how relative dating works.

8. What is the limitation of relative dating?

9. What dating technique is often used by paleontologists to determine the specific age of a fossil?

10. How do scientists use this dating technique to determine the ages of rocks or fossils?

11. Index fossils are used in the type of dating called a. radioactive dating. b. periodic dating c. relative dating d. absolute dating12. Species that died out are said to be _________________.13. Explain the relationship between radioactive decay and half-life.

14. When performing radioactive dating, scientists measure thea. number of protons and neutrons in the nucleus of a radioactive isotope.b. amount of a particular radioactive isotope contained in a material.c. age of a living organism that is exposed to radioactive isotopes.d. rate at which the mass of an object decreases over time.

15. Oxygen was added to Earth’s atmosphere by the process of

a. macroevolution. b. coevolution. c. endosymbiosis. d. photosynthesis

16. The purpose of the netting in Redi’s experiment was to prevent a. maggots from leaving the jar.b. air from leaving the jar.c. adult flies from entering the jar.d. bacteria from entering the jar.

17. In Pasteur’s experiment, the function of the curved neck on the flask was to preventa. air from entering the body of the flask.b. air from leaving the body of the flask.c. solid particles from entering the body of the flask. d. broth from spilling out of the flask.

18. List the six components of Earth’s early atmosphere.a. b.c. d. e. f.

19. Circle the letter of each sentence that is true about Miller and Urey’s experiments.a. Their purpose was to determine how the first organic molecules evolved.b. The experiment led to the formation of several amino acids.c. They accurately simulated conditions in Earth’s early atmosphere.d. The results were never duplicated by other scientists in their experiments.

20. Researchers using the technique of Miller and Urey have been able to producea. amino acids and sugars. b. ATP and mitochondria.c. proteins and DNA. d. cells membranes and simple cells.

21. Define Biogenesis.

22. Define Spontaneous Generation.23. What change occurred in Earth’s atmosphere after the evolution of photosynthesizing prokaryotes (bacteria)? Why?

24. Fill in the steps below to show the evolution of eukaryotic cells using the words below.

eukaryotic cell protocell prokaryotic cell

25. What does the endosymbiotic theory propose?

Extra Credit Create a Soup Label for primordial soup. Write in the missing information on the label including Heating instructions, more Nutritional facts, a list of ingredients, and a description of this amazing soup. Use what you have learned about primordial soup and early Earth’s conditions, molecules, and environment. Be Creative!

Ingredients

Ingredients

This soup will amaze you with itsHeating Instructions

Nutrition Facts Amount/Serving %RDA Serving Size: 1 mole Protein 0% serves all of Earth Fat 0% Calories 0.0 Carbohydrates 0% Fat Calories 0.0 Fiber 0% Serving size based Vitamins 0% on a 90% chance of a successful Origin of Life