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Natural Causes
Notes
| Question | Answer |
|---|---|
| the Minoan and the Roman Warm perods were____ warmer than present | 4 degrees |
| the Medieval Warm period is __ degrees warmer than present | 2 |
| between 1650 and 1850 the world cooled _____ degrees | 4 |
| in the 20th century warming period it has warmed _-_ degrees in the last 100 years | .2-.9 |
| there were records of huge ____ production in the Roman warming period | wine |
| Scientists used the evidence provided to _ | infer the climate changes |
| the warmest time period | the holocene climate optimum |
| scientists credit medieval warm period to | the Inca Empire |
| Incas had warm weather to farm extensivley irrigated with _____ | glacier runoff |
| Vikings took advantage of the ocean to settle ___ and _____ | Iceland ; Greenland |
| ________ years ago there was a deep ice age level down _____ ft. and man walked from _____ to ___ | 50000; 300;Asia; Alaska |
| took Earth ___ years to get out of Ice Age | 40000 |
| Holocene refers to the Earth's last______ years of history | 10000 |
| CO2 levels have been rising for _______ years to end the ice age | 18000 |
| ice core samples from antarctica show __ glacial/ interglacial cycles | 8 |
| when did warm period peak and what has itt been doing since | 1998; cooling |
| Have CO2 levels reached previous interglacial periods | yes |
| 9.99% of climate is regulated by | water, orbital variations,and solar variations |
| water accounts for what percent of the greenhouse effect | 36-66 |
| T/F CO2 causes climate change. explain | false because co2 is a product of climate change |
| there is a constant exchangement between | oceans, atmosphere, and vegetation |
| _____ billion tons of CO2 circulate annually between ocean and atmosphere | 90 |
| when ocean water is ------- gases are absorbed and trapped | cold |
| what is an indicator of a rising temperature | co2 |
| what water mass is a BIG indicator of temperature | Arctic Ocean |
| what is the effect of no evaporation | no snow to replenish the icecaps so they will shrink |
| what do large amounts of snow cause | the solar heat goes into space causing global cooling |
| it takes ____ years of warming or cooling to effect the world's oceans which in turn effects the atmos | 800 |
| perihelion and aphelion are examples of | eccentricity |
| diffe rfrom the normal | eccentricity |
| variation in the earth's tilt from the sun | obliquity |
| the change in the earth's wobbling | precession |
| why does solar variation vary | the sun is more active through cycles |
| sun spots vary thru a ____ year cycle | 11 |
| from 1900 - 1960 there were more sunspots ever seen in over ___ years | 8000 |
| the last sunspot cycle was from 1991- 2007 averaged ________ sunspots per year | 1361 |
| the current sun spot cycle began in 200 and appears to be _ -er than the others | weaker |
| our present sunspot cycle had its peak in | 1998 |
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surfergurl
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