| A | B |
|---|
| biomass | plant matter or animal waste that can be used as energy |
| smog | smoke and fog |
| reservoir | storage area for water |
| seamount | underwater mountain |
| acid rain | precipitation mixed with wastes from burning fuels |
| aquifer | underground layer of rock or soil filled with water |
| basin | ocean floor |
| water table | top of water-filled spaces in the ground |
| current | stream of water that flows in the ocean |
| abyssal plain | large flat lands on the ocean floor |
| spring | where groundwater seeps out of the ground |
| groundwater | water that seeps into the ground into spaces between bits of rock and soil |
| fossil fuel | fuels formed from the decay of plants and animals |
| ultraviolet rays | sun rays blocked by the ozone layer |
| desalination | makes seawater drinkable |
| geothermal energy | hot springs |
| respiration | oxygen is needed for this |
| alternate energy sources | water, wind, tides, sun |
| water purification process | chlorine added to water can do this |
| water cycle | freshwater constantly renewed |
| renewable resources | oxygen is an example |
| resources | coal, oil, natural gas, seeweed |
| seafloor vents | tube worms live here |
| surface currents | caused by wind |
