three states of water
water, three states, solid, liquid, gas, ice, vapor, steam, snow, condensation, evaporation, freezing, melting, boiling, phase change, temperature, heat, energy, crystallization, sublimation, deposition, atmosphere, cloud, droplet, humidity, climate, environment, nature, cycle, weather, water molecules, thermal energy, kinetic energy, density, physical change, state transition, natural science, chemistry, physics, water cycle, earth system