Our blue Ice Gradient cursor pack features water in its solid form, but it’s also essential to our planet. Did you know that there are two types of ice on Earth? Research states that there is land ice, which consists of fresh water, and sea ice, made of salt water. They are formed the same way. As the liquid cools down, the potential energy is reduced, and the molecules begin to move slower. When the water temperature reaches around 0°C, the molecules stick together and form ice.