In considering the water quality in and around the US, the EPA analyzes these critical physical states: temperature, light, and
hydrology including rainfall, flow rates, and sea level. What key human activity could result in changes in all of the physical states
listed here?
global warming
release of carbon dioxide into the atmosphere
an ever-increasing hole in the ozone layer in Earth's stratosphere
changes in the hydrologic cycle and rates of evaporation/precipitation
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About __ of the mass of the cell is water

The table presents the average day and night temperatures in five cities. it also reveals whether a city receives substantial rainfall (wet climate) or little rainfall (dry climate). which city’s rocks are likeliest to experience frost wedging, and why? a) city a because the consistently subzero temperature would prevent water from melting b) city b because it is a wet region and the temperature fluctuates around the freezing point c) city c because it receives plenty of rain fall and the weather is moderately cool d) city d because the hot and dry weather would cause rocks to absorb water

Do plant cells perform cellular respiration?