国家地理儿童百科 · 国家地理儿童百科流利级(高级)
Water Can Change
Ice Ice is hard and cold. Ice is a solid. A solid has its own shape.
What happens when you put ice in the sun? 1 The heat from the sun melts the ice. 2 The hard ice changes. 3 The ice becomes water
Water Water is a liquid. The heat changedthe ice to water. The heat changedthe solid to a liquid. A liquid is runny. It flows easily. A liquid takes the shape of its container
What happens when you heat water? 1 The heat makes the water boil. 2 The water changes. 3 The water becomes steam.
Steam Steam is a gas. The heat changed the water to steam. The heat changedthe liquid to a gas. It is hard to see most gases. A gas goes intothe air. A gas spreads to fill any space.
