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Earth’s Atmosphere

Earth’s Atmosphere. Unit 2. KWL. What I WANT to know. What I KNOW:. What I LEARNED. How do we measure air temperature?. Temperature is measured using a thermometer . Temperature is measured by degrees. There are two types: Celsius (what the Scientists use)

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Earth’s Atmosphere

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  1. Earth’s Atmosphere Unit 2

  2. KWL What I WANT to know What I KNOW: What I LEARNED

  3. How do we measure air temperature? • Temperature is measured using a thermometer. • Temperature is measured by degrees. There are two types: Celsius (what the Scientists use) and Fahrenheit (what we use) • Question: What is the temperature today? How is the temperature different in the summer, fall, spring, and winter?

  4. Sunlight • Question: How does sunlight affect air temperature? • When sunlight warms the solids and liquids on Earth, those solids and liquids warm the Earth above them. Therefore, the farther away from Earth, the colder it is. What planet do you think may be the coldest? • Direct sunlight, at noon or on a summer day will cause the highest temperature. While, the early morning sun in winter may not cause the temperature to rise very much at all. Question: What month is the hottest in Philadelphia? Why? • The length of the day will also affect the temperature! When the day is longer it can cause the liquids and solids to warm more (since the sun beats down on them longer), which causes a higher temperature!

  5. What causes air pressure and how do we measure it? • Air is matter and matter has mass. • The pressing down of air is called air pressure.

  6. Lab • Wind Spinner/Whirlagig http://www.youtube.com/watch?v=3s1RPpz8P7I Paper plate Markers String Scissors

  7. Pin Wheels http://www.edmontonsmallpress.org/non2007/PinwheelTemplate_Letter.jpg Paper Markers Straw Glue Scissors

  8. How to: • Draw a swirl design on your paper plate with a black marker • Color in the spaces with a pattern • Cut along the black line • Hole punch the top and place a string through it • Hang to catch the wind and watch it spin!

  9. How does air pressure on Earth change? • 1. Low pressure area is a place where warm air rises and pushes down on Earth’s surface with less pressure. • 2. High pressure area is a place where cool air sinks and pushes down on the Earth’s surface with more pressure

  10. How is air pressure measured? • Air pressure can be measured by using a barometer. • There are two types of barometers • 1. one type is an upside down barometer filled with mercury (the red stuff). As the air pressure rises, so does the mercury. • 2. another type of barometer has a circular dial in a sealed box. The outside of the box moves slightly as the air pressure changes. This cause the pointer on the dial to move.

  11. Wind. What causes it? • When the air moves from an area of high pressure to an area of low pressure it causes wind.

  12. How do we measure wind? • Wind direction is measured using wind tools. • 1. a wind vane rotates on a top of a pole. The tail of the vane is pushed by the wind and an arrow at the opposite side of the vane points into the wind. • 2. A wind sock is another tool. It indicates how strong the wind is blowing.

  13. Anemometer • An anemometer measures the exact speed of wind. It has 3 or 4 cups attached to a pole. The wind causes this part of the anemometer to spin. The number of turns per minute gives us the speed of wind.

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