Water Cycle 1 What can be a solid

Water Cycle

1 What can be a solid, liquid, and a gas?

1 Water can be a solid Ice When water freezes, it is in it’s solid state. Ice forms when the temperature is below freezing which is 32 degrees Fahrenheit or 0 degrees Celsius. When in this form, it retains the shape it was in when it froze.

1 Water as a liquid When ice is warmed above freezing, it melts and enters it’s liquid state. When in this form it takes the shape of any container it is in.

1 Water as a Gas In this state, water is not visible. On a hot, humid day we can feel it in the air. When water boils, at 100 degrees Celsius or 212 degrees Fahrenheit it forms water vapor. The steam that you see above boiling water has not yet become a gas, you are seeing very small droplets of water suspended in the air. When it evaporates, it becomes a gas which can only be seen with special instruments.

2 What is the difference between Condensation and Evaporation?

2 Evaporation When water changes from a liquid to a gas Name examples from everyday life: *Puddles drying up after a rain *clothes drying in the dryer *Beach towel drying on a railing after a day at the pool or beach *lips drying after licking them

2 How can the speed of evaporation change? Four factors will affect the speed of evaporation: 1. Wind-stronger wind increases evaporation 2. Relative humidity-lower relative humidity (the amount of moisture in the air compared to what the air can ‘hold’ at that temperature ) increases evaporation 3. Surface area-larger surface area increases evaporation 4. Heat- warmer temperatures increase evaporation

2 Condensation When water changes from a gas to a liquid. This occurs when water vapor cools or loses heat. Where have you seen Condensation? *Moisture on outside of a glass of a cold drink *Dew on the grass in the morning *Fog, clouds, and mist *frost on the window or windshield in the winter *steam on the mirror after a hot shower or bath Evaporation and Condensation together make precipitation.

3 What is the Water Cycle? The continuous movement of water from the ocean, to air and land then back to the ocean again. Water Cycle

Water cycle

The water cycle is the continuous movement of water from ocean to air to land then back to the ocean. This is a never-ending process. Steps of the Water Cycle The sun heats water on the Earth’s surface. The water changes into water vapor and rises into the air. This is an example of evaporation. Sometimes plants give off water vapor into the air. This is called transpiration. Water vapor in the air cools and condenses and becomes liquid. This is an example of condensation. Water droplets combine in the air to form clouds. When the droplets become too heavy they fall to the earth as precipitation. Some of the water that falls to Earth moves down into the soil as groundwater. This process is called infiltration. Other water that falls to Earth drains or flows into a collection of water as runoff. This process is called collection.