1.- WATERFALL      2.- VALLEY      steep descent water stream Niagara 4.- CAVE      underground chamber open surface storage 7.- HILL      rounded natural elevation lower mountain range of hills between depression earth surface 3.- CLIFF      steep vertical rock earth ice 5.- FOREST      dense growth trees animals used for game 8.- SHORE land to border beach coast water 6.- PATH      trodden way track walk cycle way 9.- TRUNK  tree  branches  root  part  main 10.- ROOT      part tree limbs trunk under 11.- BRANCH  part  tree  trunk  root  fruit 13.- BLOSSOM      flower appear before fruit tree 16.- FOREST FIRE      light flame heat summer element 12.- LEAF  green  fruit  foliage  photosynthesis  plant 14.- LAKE      inland body standing water energy boat flood 17.- FLOOD  rising  overflowing  water  natural disaster  quantity 15.- DESERT      arid land sparse vegetation Sahara 18.- HURRICANE  cyclone  winds  western Atlantic  thunder  lightning 19.- DROUGHT      period dryness crops desert growth 20.- TORNADO      22.- EARTHQUAKE      shaking trembling earth volcanic tectonic warming atmosphere solar ratiation heat planet      23.- TIDAL WAVE      25.- GREENHOUSE EFFECT      violent tropical windstorm whirling wind funnel-shaped cloud 21.- VOLCANO high sea wave earthquake to trigger water 24.- WEATHER      26.- OZONE LAYER      atmosphere radiation ultraviolet global warming hole lava rock steam hill mountain forecast the news atmosphere sunny map 27.-GLOBAL WARMING      ozone layer to increase temperature greenhouse effect pollution 28.- ACID RAIN      precipitation pesticides crops pollution to lose 29.- RADIATION      31.- CROPS      grow harvest profit subsistence plant 34.- UNLEADED PETROL      lead contain type cars fuel solar energy waves particles emission 30.- DEFORESTATION      32.- EXHAUST FUMES      cars pollution CO2 gas smoke 33.- PESTICIDES      35.- RENEWABLE ENERGY      solar natural resources wind power hydropower geothermal forest trees clearing to sell fuel to protect crops pests destroy poison 36.- FACTORY      building facilities manufacturing machines workers