The water cycle is a exciting and continuous process. 76. ______ The warm sun causes water on Earth to vapor, that is, 77. ______ to change into a gas and rise up into the sky. This is how forms 78. ______ clouds that float in the sky. Clouds can be mass of water droplets or 79. ______ ice particles. When the clouds get heavier enough, the water falls 80. ______ back to the earth. The water vapors must turn into a liquid or solid 81. ______ after it can fall to the earth. When the water falls back to the earth 82. ______ it is called precipitation. The water may fall in rain, snow, or hail. 83. ______ Plants in our environment also sends water vapor into the 84. ______ atmosphere. When plants do this it is called transpiration. 85. ______