12.21: Climate- Challenge 3
- Page ID
- 5548
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- 1. The average global temperature during glacial periods was ___ less than the current average global temperature.
- 5.5°C (10°F)
- 2. The Vikings colonized Greenland during the ___and were forced out during the ___.
- Medieval Warm Period; Little Ice Age
- 3. The Little Ice Age lasted for a period of ___ years.
- 500
- 4. ___ is a byproduct of photosynthesis.
- Oxygen
- 5. Carbon is the ___ most common element in the human body.
- second
- 6. ___ are a natural source for the release of carbon dioxide in the atmosphere.
- volcanoes
- 7. Warmer temperatures are causing coral reefs to ___, eventually killing them.
- turn white
- 8. Temperatures have been rising since ___, but the ___ is increasing.
- the end of the Pleistocene; rate of increase
- 9. One negative impact of modern technology is that ___.
- the level of pollution is increasing
- 10. If the amount of ___ gases in the atmosphere continues to increase, more thermal energy will be trapped in the atmosphere, and global temperatures will continue to rise.
- greenhouse
- 11. An increase in the occurrence of severe storms, floods and droughts, and effects on the seasonality of animals are all consequences of ___.
- climate change
- 12. Atmospheric carbon dioxide concentration has increased by ___ over the last fifty years.
- 80 ppm
- 13. Marine organisms with carbonate shells will struggle growing because of ___.
- ocean acidification
- 14. Water shortages will become a problem in some areas because ___.
- reduced snowpack and earlier springs due to global warming will reduce water availability from snowmelt
- 15. The increase in average global temperature seen in the past two decades was caused by ___.
- burning of fossil fuels by humans