Holiday Science

3. The simple sugar found in holiday treats that provides quick chemical energy.
6. When snow or ice turns directly into water vapor without melting first.
9. The seasonal movement of animals from one region to another to find food.
11. The day with the fewest hours of sunlight in the Northern Hemisphere.
12. Ground that remains completely frozen for at least two consecutive years.
13. The bending of light through ice crystals that creates ""sun dogs"" or halos.
15. A state of minimal activity and metabolic depression in animals during winter.
17. Term for ""warm-blooded"" animals that generate their own internal heat.
18. The portions of Earth's surface where water is in solid form (ice/snow).

1. Shimmering light displays in the atmosphere caused by solar particles.
2. "The ""tree-like"" branching structure of a complex snowflake crystal.
4. The measure of how much solar energy a snow-covered surface reflects.
5. Material (like down feathers or trapped air) used to reduce heat loss.
7. A line on a weather map connecting points of equal temperature.
8. Biological proteins that prevent some insects’ blood from freezing.
10. A thick layer of vascularized fat used by marine mammals for warmth.
14. A tree that keeps its needle-like leaves and stays green all winter.
16. A period in a plant's life cycle when growth and development temporarily stop.