science crossword

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Across
  1. 3. states that older rocks and fossils are found deeper into the ground
  2. 4. this is another word for farming and can produce lots of greenhouse gases
  3. 5. a period or time in which the dinosaurs lived
  4. 7. a greenhouse gas that cattle produces
  5. 9. we breathe it out trees use it to make oxygen and too much of it is bad for the climate
  6. 10. a supercontinent
Down
  1. 1. a species that went extinct a long time ago
  2. 2. clearing or forest
  3. 6. a type of rock formed from weathering and erosion
  4. 8. it is a liquid rock that is hot under the ground