6. What do all living components of an ecosystem form? A. nonliving components B. abiotic environment C. climate D. biotic community 7. Which of the following is most likely to contain CFCs? A. air conditioner B. classroom C. bicycle D. none of the above 8. What is the correct term for an area's average temperature and precipitation? A. ecosystem B. abiotic factors C. climate D. latitude 9. Which Alberta biome receives little precipitation , has very few trees., and is usually found in the prairies? A. boreal forest B. mountains and foothills C. parkland D. grassland 10. Which Alberta biome has extreme variations in temperature and amounts of precipitation due to altitude changes over short distances? A. boreal forest B. mountains and foothills C. parkland D. grassland

6. **D. biotic community** - The living components of an ecosystem (plants, animals, fungi, bacteria, etc.) are collectively called the biotic community.<br /><br />7. **A. air conditioner** - Chlorofluorocarbons (CFCs) were commonly used as refrigerants in air conditioners and refrigerators. While their use has been phased out due to their damaging effect on the ozone layer, older units may still contain them.<br /><br />8. **C. climate** - Climate is defined by the long-term average weather patterns of a region, including temperature and precipitation.<br /><br />9. **D. grassland** - Grasslands in Alberta, and elsewhere, are characterized by low precipitation, limited tree growth, and prairie landscapes.<br /><br />10. **B. mountains and foothills** - The rapid changes in elevation in mountainous regions lead to significant variations in temperature and precipitation over short distances. As you go higher, the temperature generally decreases and precipitation patterns can change.<br />