Across
- 4. Study of past climates
- 8. ____________ is different than climate because it is day-to-day conditions
- 9. __________ cores show trapped air bubbles reveal past atmospheric composition
Down
- 1. Earth formed 4.5 ______________ years ago.
- 2. Long periods of reduced global temperatures
- 3. Long-term average weather patterns in an area
- 5. ___________ Optimum (52-50 million years ago): Warmest period in past 66 million years
- 6. The _______________ period (145-66 million years ago was much warmer than today
- 7. ____________ core show layered deposits contain climate information