Read pages 506 – 509 and Read pages 506 – 509 and answer the following answer the following questions.questions.• 1. Why do clouds form?1. Why do clouds form?

• 2. How do snow and rain happen?2. How do snow and rain happen?

• 3. How are cloud type and 3. How are cloud type and precipitation related?precipitation related?

Clouds Clouds

• Clouds are made of water drops or ice crystals.Clouds are made of water drops or ice crystals.• Clouds form when water vapor condenses and Clouds form when water vapor condenses and

sticks to dust particles.sticks to dust particles.• Clouds only form in the troposphere.Clouds only form in the troposphere.• The prefix nimbo- refers to a cloud that brings The prefix nimbo- refers to a cloud that brings

rain or snow.rain or snow.• A stratus cloud that forms at ground level is fog.A stratus cloud that forms at ground level is fog.• Precipitation occurs when water drops become Precipitation occurs when water drops become

too heavy to remain hanging in the air.too heavy to remain hanging in the air.• The 4 types of precipitation are rain, snow, sleet The 4 types of precipitation are rain, snow, sleet

and hail.and hail.