1. A hygroscopic substance is one which   Absorbs air   Releases water   Releases air   Absorbs water   Hint Half-n-half Clue   2. Air is a   Gas   Liquid   Plasma   Solid   Half-n-half Clue   3. Fish breathe through   Gills   Skin   Lungs   Nose   Half-n-half Clue   4. Dry ice is   Very Cold Ice   Ice with salt added   Any Frozen Liquid   Solid Carbon Dioxide   Half-n-half Clue   5. A barometer is used for measuring   Temperature   Annual Rainfall   Atmospheric Pressure   Humidity   Half-n-half Clue   6. Which of the following is necessary for a substance to burn?   Oxygen   Gasoline   Hydrogen   Light   Half-n-half Clue   7. Lime water turns milky after carbon dioxide is passed through it.   True   False