Why do we need to study weather? How would you like to attend an outdoor picnic in the rain? Do you like to know when a severe storm is coming?
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1 Welcome! Jr. Meteorologist! Why do we need to study weather? How would you like to attend an outdoor picnic in the rain? Do you like to know when a severe storm is coming? We get this information from television, radio, newspapers, and weather radios. We receive this information from trained individuals called meteorologists. A meteorologists is a scientist who studies the atmosphere and its changes in order to predict daily weather.
2 Weather and Climate What is the weather like today? Is it like this EVERY day? Or why not? Why? Prediction: What is the difference between WEATHER and CLIMATE?
3 The Layers of the Atmosphere The layers of the atmosphere are defined by changes in temperature. For example, -sphere means ball, which suggests that each layer of the atmosphere surrounds the Earth like a hollow ball. Tropo- means turning or change, and the troposphere is the layer where gases turn and mix. Strato- means layer, and the stratosphere is the sphere where gases are layered and do not mix very much. Mesomeans middle, and the mesosphere is the middle layer. Finally, thermo- means heat, and the thermosphere is the sphere where temperatures are highest.
4 Layer by Layer The troposphere is the first layer above the surface and contains half of the Earth's atmosphere. Weather occurs in this layer.
5 The Atmosphere BIG IDEA: Earth s atmosphere is a mixture of gases that distributes heat and enables life to exist on Earth.
6 What makes up DRY air in the atmosphere? 78% nitrogen--used to make protein 21% oxygen (from photosynthesis) processes that use oxygen: cellular respiration (plants and animals) oxidation (like rust, tarnish) combustion* --1% other gases (argon, carbon dioxide, other)
7 What makes up air (atmosphere)?
8 Weather Weather is constantly changing, and it refers to the state of the atmosphere at a given time and place
9 In other words words what it s In other like OUTSIDE, right HERE, right NOW
10 Measureable properties of weather air temperature humidity type and amount of precipitation air pressure speed and direction of wind
11 Climate The long-term environmental conditions across a large area and long time. Climate, however, is based on the average, year-after-year conditions of temperature, precipitation, winds, and clouds in an area.
12 Climate helps describe a place or region
13 Reading Check: What is the difference between WEATHER and CLIMATE?
14 What affects weather and climate? There are two major factors that affect the overall environment and climate -The tilt of the Earth in relation to it s orbit around the Sun - The direction of that tilt that changes as the Earth travels around the Sun
15 First, some basic vocabulary Revolution one ORBIT, or trip around the Sun. This takes the Earth 365 ¼ days Rotation one SPIN of the Earth on it s axis. This takes about 24 hours one DAY.
16 Earth s TILT The Earth is not vertical (straight up-anddown) in relation to it s orbital path, it s tilted 23 ½ degrees from vertical. This tilt means that the Sun s energy doesn t hit the Earth equally.
17 Earth s TILT This tilt results in uneven heating of the Earth s surface. Direct sunlight Indirect sunlight
18 Continue notes with next PowerPoint! See Below!
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