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Across 2. Seasons on Earth are caused by the tilt of the Earth's ----------. 4. Mountain ranges, lakes and ---------- affect the climate of a region. 5. the part of the earth's crust, waters, and atmosphere that supports life 8. the collective mass of water found on, under, and over a planet's surface. 9. measure of the distance north and south of the equator 10. Land areas near warm water currents have warm ---------- . 13. the atmospheric layer between the stratosphere and the thermosphere 14. a mixture of gases that surrounds the Earth 16. the weather and clouds occur in this layer of the atmosphere 17. 80% of the gases that surround the Earth 18. the solid part of the earth consisting of the crust and outer mantle lithosphere layer 19. the result of energy transfer among the 4 earth systems

Down 1. the day to day changes in the atmosphere 3. When the North Pole is tilted toward the sun it is ---------- in the Northern hemisphere. 6. the second layer of the atmosphere, as one moves upward from Earth's surface, it is characterized by a slight temperature increase with altitude and by the absence of clouds 7. the outermost layer of the Earth's atmosphere, where atmospheric pressure and temperature are low and temperature are low 10. The outermost shell of the atmosphere, between the mesosphere and outer space 11. As ---------- increases, temperature decreases. 12. When the South Pole is tilted toward the sun it is ---------- in the Northern hemisphere. 15. There are 3 major climate zones according to ---------- temperatures.