Final answer:
Clear ice is a solid phase of water that forms when water vapor freezes without impurities or air bubbles. It typically forms at temperatures below freezing and can form in clouds when there is enough moisture and temperature is below freezing.
Step-by-step explanation:
Clear ice is a solid phase of water that forms when water vapor freezes without any impurities or air bubbles. It is transparent and can be found in things like ice cubes and frozen lakes.
Clear ice typically forms at temperatures below the freezing point of water, which is 0°C (32°F). It can form in clouds when there is enough moisture in the air and the temperature is below freezing. In these conditions, water vapor in the air condenses into tiny ice crystals that can grow into clear ice.