Frost on objects is just water vapor in the air that has deposited itself as ice onto a surface. Frost forms on objects close to the ground, such as blades of grass.At night, a blade of grass loses energy by emitting radiation (a non-lethal kind) while it gains energy by absorbing the energy emitted from surrounding objects. Under clear nighttime skies, objects near the ground emit more radiation than they receive from the sky, and so a blade of grass cools as its energy losses are greater than its energy gains. If the temperature of a grass blade gets cold enough and there is sufficient water vapor in the environment, frost will form on the grass. Continue reading →
What is frost? - Met Office
Forecasting frost - Met Office
Guide to Frost
Iowa weather: Why frost happens even when temperatures don't reach freezing
How does frost form? WJMN
What is hoarfrost?
How frost forms when the temperature is above 32 degrees
Weather Academy: How does frost form?
How Does Frost Form? DIY Science Project Ideas For Kids
How Does Frost Form?
