1. Soft gray powder that remains after something has been burned.

• ash
• fire
• residue
• charcoal

2. Clearing or burning trees and other vegetation to make available for other uses.

• reforestration
• deforestration
• forest burning
• replanting

3. Rise and fall irregularly in number or amount.

• increase
• trend
• fluctuate
• steady

4. Huge

• tiny
• regular
• massive

• large

5. Occurs when one event makes another event happen.

• compare-contrast
• similiarities-differences
• cause-and-effect
• problem-solution

6. Become smaller

• sink
• shrink
• expand
• flexible

7. The concentration of salt in water.

• chlorine
• salty
• salinity
• bouyancy

8. Increase in amount or extent.

• deaccelerate
• calibrate
• release
• accelerate

9. A region of ice or other frozen matter surrounding a pole of a planet.

• cap ice
• polaris
• polar region
• polar cap

10. A large mass of ice that moves slowly over land.

• iceberg
• ice block
• glacier
• ice cube