Which of the following is not part of Earth’s climate system?BiosphereExosphereGeosphereAtmosphereHydrosphereVariations in Earth’s orbit that influence long-term climate changes include ________.the...

Which of the following is not part of Earth’s climate system?BiosphereExosphereGeosphereAtmosphereHydrosphereVariations in Earth’s orbit that influence long-term climate changes include ________.the wobbling of Earth’s axis of rotation (precession)eccentricity, obliquity and precessionthe shape of Earth’s orbit (eccentricity)the tilt of Earth’s axis of rotation (obliquity)Of the following natural factors, which have caused past climate changes on Earth? Choose all that apply.volcanic eruptionsburning of fossil fuelschanges in solar energyvariations in Earth’s orbitWhich of the following human-generated gases makes the greatest relative contribution to increasing the greenhouse effect?Carbon dioxide (CO2)Chlorofluorocarbons (CFCs)Methane (CH4)Nitrous oxide (N2O)Water vaporHow much are global surface temperature expected to increase by the year 2100 if humans replace much of today’s fossil fuel combustion by new and more efficient technologies?2°C2.5°C4°C3.5°C3°CThe current level of atmospheric ________ recently surpassed 400 parts per million.chlorofluorocarbonswater vapornitrous oxidemethanecarbon dioxideWhich of the following nutrients can limit primary productivity by phytoplankton? Choose all that apply.calciumsilicanitratesironphosphatescarbon dioxide