Clouds and Cloud Formation Mr. Fetch’s Earth Science Classroom

Mr. Fetch's Earth Science Class What is a cloud? Clouds: groups of tiny water drops. Air rises Air cools Air condenses CLOUDS FORM WHEN: Mr. Fetch's Earth Science Class Mr. Fetch’s Earth Science Classroom

Mr. Fetch's Earth Science Class 4 Ways to get air to rise. Warm air rises. Convection Air rises up over a mountain. Orographic Lifting A cold front lifts air up as it moves. Frontal Lifting Wind hits from opposite directions and goes up. Convergence Mr. Fetch's Earth Science Class Mr. Fetch’s Earth Science Classroom

Mr. Fetch's Earth Science Class Convective Lifting Air BACK Mr. Fetch's Earth Science Class Mr. Fetch’s Earth Science Classroom

Mr. Fetch's Earth Science Class Orographic Lifting Air BACK Mr. Fetch's Earth Science Class Mr. Fetch’s Earth Science Classroom

Mr. Fetch's Earth Science Class Frontal Lifting Cold Air Warm Air BACK Mr. Fetch's Earth Science Class Mr. Fetch’s Earth Science Classroom

Mr. Fetch's Earth Science Class Convergence Air Air BACK Mr. Fetch's Earth Science Class Mr. Fetch’s Earth Science Classroom

Mr. Fetch's Earth Science Class Air cools when it expands Air Air Air Air Mr. Fetch's Earth Science Class Mr. Fetch’s Earth Science Classroom

Mr. Fetch's Earth Science Class Cooling air causes it to Condense The temperature when condensation begins is called the Dewpoint Temperature. Air cools by expanding. Cooling air increases Relative Humidity. Air becomes full of water } SATURATED Water condenses out of the air. GAS  LIQUID Clusters of water drops are called clouds. Dust and salt in the atmosphere are examples of condensation nuclei Mr. Fetch's Earth Science Class Mr. Fetch’s Earth Science Classroom

Mr. Fetch's Earth Science Class Summary: Cloud Formation AIR CONDENSES AIR RISES AIR COOLS Convection Orographic Lifting Frontal Lifting Convergence By expanding Cools to the dewpoint and water vapor condenses. Mr. Fetch's Earth Science Class Mr. Fetch’s Earth Science Classroom