Across
- 6. CLOSELY PACKED TOGETHER
- 7. THE OUTERMOST LAYER OF EARTH'S ATMOSPHERE; THE LAYER IN WHICH MOLECULES CAN ESCAPE EARTH'S GRAVITY
- 8. THE STRENGTH OR ENERGY THAT MOVES AN OBJECT
- 10. SUBSTANCE THAT ARE DISCHARGED INTO THE AIR, SUCH AS FROM ENGINES AND FACTORIES
- 11. MATTER THAT CAN FREELY CHANGE SHAPE AND SIZE; OFTEN CAN'T BE SEEN
Down
- 1. THE WEATHER CONDITIONS IN AN AREA OVER A LONG PERIOD OF TIME
- 2. THE FORCE THAT AIR PUTS ON AN OBJECT
- 3. TO CHANGE FROM A LIQUID TO A GAS STATE
- 4. TO CHANGE FROM A GAS TO A LIQUID STATE
- 5. THE MASS OF AIR AROUND EARTH
- 6. AREAS OF LAND THAT DO NOT RECEIVE MUCH RAINFALL AND THAT HAVE LIMITED VEGETATION
- 9. AN INVISIBLE, ODORLESS GAS THAT PLANTS USE DURING PHOTOSYNTHESIS AND THAT ANIMALS BREATHE OUT AS A WASTE PRODUCT