| A | B |
|---|
| Geologists | Study the earth’s surface and internal structures |
| Astronomers | Study the universe beyond the earth |
| Meteorologists | Study the earth’s atmosphere and predict weather and climate |
| Oceanographers | Study the earth’s oceans |
| The Solar System | The family of planets orbiting the sun |
| Protoplanet Hypothesis | An informed guess about the origins of the solar system |
| The infant earth grew hot due to: | Compression, Radioactive minerals, Meteorites |
| Formation of Continents | Light rock rose to surface or Formed by huge lava flows |
| Creates free oxygen | Photosynthesis |
| Model | a picture showing something that cannot be seen in its natural state |
| Inner Core | Solid iron and nickel |
| Outer Core | Liquid iron and nickel |
| Mantle | Heavy rocks (iron, silicon, etc.) |
| Crust | Less than 1% diameter of earth |
