| A | B |
|---|
| Name the nine planets in the solar system? | Mercury, Venus, Earth Mars, Jupiter, Saturn, Uranus, Neptune |
| How much oxygen is in the atmosphere? | 21% |
| In what year did Stanley Miller perform his experiment? | 1952 |
| How is it believed that the ocean got its saliny? | The rainfall fell to the earth landed on the rocky surfaces dissolved many elements and compounds and carried them into the ocean. |
| What was the purpose of Stanley Miller's experiment? | It simulated the theory of primitive earth |
| How old is the oldest rock on Earth? ? | Over 4 Billion years old |
| What is the process by which scientists date rocks? | Radiometric age dating |
| Charles Darwin? | An early 19th century English Naturalist |
| What are the oldest fossilized remains of organisms ? | Primitive photosynthetic bacteria recovered from rocks formed on the sea floor. |
| How old is the oldest fossilized remains? | about 3.5 years old |
| What is iron oxide? | rust |
| What is photosynthesis? | Plant cells capture |
