Atmosphere: Composition and Layers Study Guide Quiz: Wednesday, January 26th Use the Air Around You book Chapter 1 section1, Air Bags lab, Skye Speaks, Reading Essentials, Layers of the Atmosphere lab, and Graphing the Atmosphere activity to study. 1. What are the two most abundant gases in the earth’s atmosphere, and what percent of the atmosphere do they make up? Most abundant gas- Nitrogen 78% Second most abundant gas- Oxygen 21% 2. Fill in the table with at least three examples (each) of permanent and variable gases: Permanent Gases Variable Gases 1. Nitrogen 1. Carbon dioxide 2. Oxygen 2. water vapor 3. ozone 3. Are mass and weight the same? EXPLAIN. NO! Mass- how much matter is in an object Weight- amount of gravity pulling down on an object 4. Does air have mass? YES How do you know? Explain our investigations experiment (balloon scale)… 5. Complete the chart with the names of the 5 layers of earth’s atmosphere: ---------- Outer Space ---------5: Exosphere 4: Thermosphere 3: Mesosphere 2: Stratosphere 1: Troposphere ____________________________________________ EARTH 6. As you increase in altitude, what happens to the density of the air? Density and air pressure DECREASE as you increase in altitude. 7. Know each layer and what you might find in each. Fill in the chart. (For example, where would you find weather?) LAYER What you might find here 5. Exo Satellites, shuttle, ISS Weather, 4. Thermo Thick, hot layer, little density, ionosphere, northern lights 3. Meso 2. Strato 1. Trop. Meteors burn Good ozone, jets, weather balloons pop people, mountains, bad ozone 8. Know the first four layers and whether the temperature increases or decreases as you increase in altitude. LAYER Temperature as you increase altitude 1. trop Decreases 2. strat 3. meso 4. thermo Increases Decreases increases 9. Fill in the blanks with the name of the matching weather instruments and write what unit is used for each? INSTRUMENT 1. Measures air pressure Barometer UNIT Millibars or inches of mercury 2. Measures temperature Thermometer Degrees Celsius 3. Measures wind speed Anemometer Mph 4. Measures wind direction Wind vane N,S,E,W 5. Measure relative humidity Hygrometer % 10. Know your atmosphere unit terms (quiz yourself with unit terms sheet or match flashcards of the terms and definitions).