What isotopes in ice cores are good proxy indicator of past temperature?
uranium-lead radiometric isotopes
oxygen-16 and oxygen-18 stable isotopes
carbon-12 and carbon-13 stable isotopes
carbon-14 isotopes
regarding the carbon cycle, when plants photosynthesize carbon is moved from the to the reservoir.
atmosphere ; biosphere
hydrosphere ; geosphere
atmosphere ; hydrosphere
geosphere ; biosphere
melting an ice cube in a glass of water will not raise the level of water, and similarly, melting sea ice will not raise sea level.
so, how can sea level rise due to climate change?
because rivers will change course and add more water to oceans.
because the temperature of the earth will rise and draw the sea-level up with it.
because the average surface temperature of the land and ocean will rise decreasing atmospheric pressure.
because the temperature will increase and allow groundwater and runoff to flow more quickly to the ocean.
because melting glaciers, which are ice on land, and thermal expansion of the ocean water.
which of the following best describes the greenhouse effect?
solar radiation is absorbed by the earth’s surface and released as infrared radiation, some of which is absorbed by greenhouse gases.
carbon dioxide is increasing in the atmosphere due to more people exhaling carbon dioxide due to exponential population growth.
greenhouse gases are released by burning fossil fuels.
humans burning fossil fuels release more carbon dioxide into the atmosphere.
in regards to earth's energy budget, energy from the sun reaches earth but the earth’s surface temperature does not infinitely rise. why is this?
greenhouse gases don't trap the heat like they used to.
the earth is also radiating thermal energy (heat) back into the atmosphere.
cfcs have depleted the ozone layer in the stratosphere.
the ozone hole is allowing heat to escape.