Solve these clues to fill the grid.
- A visible suspension in the air of particles of some substance
- 6 Across
- Hottest season of the year
- 7 Across
- An increase in the average temperature of the earth's atmosphere
- 9 Across
- The process of giving off or exhaling water vapor through the skin or mucous membranes
- 11 Across
- The quantity of water falling to earth at a specific place within a specified period of time
- 15 Across
- Located at or near or coming from the earth's poles
- 16 Across
- The responsive adjustment of a sense organ to varying conditions
- 1 Down
- The maintenance of a certain quantities unchanged during chemical reactions or physical
- 2 Down
- A shortage of rainfall (plural)
- 3 Down
- The state of being clear of trees
- 4 Down
- The process of purifying a liquid by boiling it and condensing its vapors
- 5 Down
- A heavy odorless colorless gas formed during respiration and by the decomposition of organic
- 8 Down
- The process of changing from a gaseous to a liquid or solid state
- 10 Down
- How hot or cold something is
- 12 Down
- Swedish astronomer who devised the centigrade thermometer
- 13 Down
- A technique used in behavior therapy
- 14 Down