Volcanic eruptions, changes in earth's orbit, meteorite impact, and even the combustion of fossil fuels all contribute directly or indirectly to climate change by a) increasing the amount of ice cover on earth. b) changing the amount of solar radiation that reaches earth. c) changing the amount of greenhouse gases in earth's atmosphere. d) increasing the amount of particulate matter in earth's atmosphere.

Which table best shows the impacts resulting from human activity? impact of human activities human activity impact forest area cleared to construct an airport increase in oxygen level vegetation cleared to construct an oil mine increase in pollution impact of human activities human activity impact forest area cleared to construct an airport increase in sound pollution vegetation cleared to construct a power plant contamination of water impact of human activities human activity impact beehives cleared from urban areas increase in vegetation dams constructed on a river increase in fish population impact of human activities human activity impact beehives cleared from urban areas increase in bird population dams constructed on a river better quality of water

According to the cell theory, which describes cells? a. all organisms are composed of multiple cells. b. all cells have the same structure and function. c. cells are found in everything on earth. d. living organisms are not created spontaneously

Which zone within the open-ocean zone is home to the most organisms? deep zone surface zone intertidal zone transition zone