Access Prior Knowledge Lesson 4: How do clouds form?

Access Prior Knowledge Lesson 4: How do clouds form? Opening Activity Open Science textbook to page 212. Open Science workbook to page 68A to review home learning. Open Science folder to review vocabulary words and outline for the chapter. Open Science journal and answer the following question: 1. What are the steps to the water cycle? Review Content Cards and Q-Cards in bin, sharing with partners quizzing each other  quietly. Log in to clickers using student ID number. Be ready to review home learning when timer goes off. Don't forget to write your  home learning in your  agenda page 69A.

Do you agree with the statement? 1 Water droplets and ice crystals make up clouds. Yes No

Do you agree with the statement? 2 Stratus clouds are seen higher than altocumulus clouds. Yes No

Do you agree with the statement? 3 Fog is a type of cloud at ground level. Yes No

Do you agree with the statement? 4 Sleet is the same as hail. Yes No

Temperature and Pressure Clouds may form in many shapes and sizes when water  vapor changes into small ice crystals or tiny drops of water. If the air temperature near the cloud is high, the cloud will  be made of water drops, but if it’s low, it will be made of ice  crystals. Many clouds form when air moves up to areas with less air  pressure. Since there is less pressure, air expands and cools  forming ice crystals or droplets. Even in the summer time the air temperature is cold  forming ice crystals. Second paragraph pg. 212

Types of Clouds Cirrus clouds are high-altitude clouds  that form above 6,000 meters. They are  thin and white. Vertical clouds grow up and down. They have air  rising in them. They are sometimes called  thunderheads because often cause  thunderstorms. Altocumulus clouds are mid-altitude  clouds that begin between 2,000 and  7,000 meters above the ground. Stratus clouds are low-altitude  clouds that form less than 2,000  meters above the ground. Fog is a cloud at ground level that can  form on clear, cool nights with no  wind.

Precipitation Most rain starts as snow because the temperature high above the ground  is usually below 0°C. If it is below 0° it will fall as snow and if the air is warmer than 0°C, the ice  crystals will melt and fall as rain. The ice crystals melt as they fall through a layer of warm air. But if the air  near the ground is very cold, rain can freeze before it hits the ground  creating frozen raindrops called sleet. Second paragraph pg. 214

Hail Formation The wind blows raindrops back up into freezing air at the top of a cloud,  making a small piece of ice. Then the ice is blown through the cloud many times making layers of  water freeze on it. Finally, it becomes too heavy for the wind to carry it back up, and it  falls as a hailstone to the ground. Clouds

Matchquest Types of Precipitation

TextQuest Answer in your Science journal. 1. What is unique about clouds in the summer time? 2. What is sleet like? 3. How do clouds form? 4. What can the distance from the ocean affect in an area? 5. What happens in the water cycle when there are cooling  temperatures? 6. Why does water evaporate in the water cycle? Don't forget to write your  home learning in your  agenda page 69A.

Access Prior Knowledge Lesson 4: How do clouds form?