Essential Question: Why do global winds curve? Science 7

Next Science Test: “Earth’s Weather” Unit Test Monday, October 12 Study guide is also posted online

Homework: Science Read “Precipitation and Humidity” reading on the wiki Complete homework questions for tomorrow

Most Missed Question: Review of the Day Which of the following describes a real-world application of the knowledge of global winds for travel? A. the use of the Jet Stream by jet planes to shorten the lengths of flights B. the use of wind belts such as the trade winds to aid in traveling by sailing ship in the Age of Exploration C. avoiding the doldrums in a sailing ship so as not to get stuck without wind D. all of the above

Review: Observe what happens to the uninflated balloon when the flask is placed on the burner. Discuss with your group. Why does this happen?

Layers of the Atmosphere Review: Altitude Distance above sea level In what layer of the atmosphere is the Ozone Layer located? As altitude increases, the density of air __________.

Global Wind Belts: Vocabulary These are areas of wind on Earth's surface that blow in a constant and predictable manner; these winds blow in a constant direction Global Wind Belts These are regions of Earth’s surface that constantly and consistently have calm weather with practically no wind. Calm Regions

Weather: Key Vocabulary This is the short-term, day-to-day conditions of the atmosphere in a particular area. WEATHER Major Components that make-up the weather: TEMPERATURE WIND PRECIPITATION AIR PRESSURE HUMIDITY

Global Wind Belts: Vocabulary This is a global wind belt that flow along the border of the troposphere and the stratosphere. It blows from East to West. Jet planes will often fly within this wind belt when traveling westward because it helps them to reduce the travel time. Jet Stream

Key Atmosphere Concepts that you MUST know! As the temperature of air heats up, the air __________ (in other words, it becomes ______ dense) As the temperature of air cools down, the air __________ (in other words, it becomes _______ dense) As Air Density Increases, Air pressure also _________________ As Air pressure Decreases, air density also _________________

Key Atmosphere Concepts that you MUST know! Fluids (such as air) move from areas of ________ pressure to areas of ________ pressure Air pressure is different in different places on Earth because… Because air pressure is different in different places on Earth, air is constantly moving from one place to another, from areas of _______ pressure to areas of _______ pressure within the atmosphere Air moving from areas of high pressure to areas of low pressure parallel to Earth’s surface is called _____.

Today’s Topic: Why do Global Winds curve?

The Coriolis Effect: Vocabulary This phenomenon explains why global winds curve towards the west (curving to the right in the direction of motion) as they travel away from the poles; it is caused by the rotation of the earth on its axis Coriolis Effect

The Coriolis Effect: Why does it happen? Global winds start at the North and South Pole because they are the areas of the Earth with the coldest air (meaning the air pressure is the GREATEST) As global winds blow from the poles, these winds want to travel straight towards the equator (which has the lowest air pressure) HOWEVER, as these winds blow, the Earth is moving underneath them because of Earth’s rotation. This means that to somebody standing on Earth, winds seem to CURVE westward (clockwise in the north, counter- clockwise in the south) as they approach the equator The Coriolis Effect also causes hurricanes to spin, pendulums to swing, and various other things on Earth

Exit Ticket: Access the “Exit Tickets” page of DeBolt’s wiki Click on the link for today’s exit ticket Complete the quiz before leaving class Name format: “your period number, Last name, First name”