All Things Atmosphere

Air Pressure Isobars and Air PressureAir pressure is an important factor affecting weather. Changes in air pressure help weather forecasters predict how the weather will change. Falling air pressure usually indicates storm weather. Rising air pressure means that the weather is clearing. Air pressure readings from barometers are shown on weather maps, like the one below, with lines called isobars. Isobars are drawn to connect areas that have the same air pressure. 1. Each isobar differs from the next isobar by 4 millibars.2. The lowest air pressure reading shown is992 millibars.3. Where low pressure occurs, the weather is likely to be stormy.4. The highest air pressure reading shown is 1016 millibars.5. The high air pressure area is likely to be experiencing fair weather.6. An area of low air pressure is centered northwest of Chicago. Air Pressure and Altitude Air Pressure in the TroposphereEarth's weather occurs in the troposphere, and air pressure is an important factor in weather. Use the data on air pressure in the table to answer the questions below. Describe the relationship between altitude and air pressure. Estimate the air pressure in a hole 500 meters below sea level. If you were flying in a plane at an altitude of 1,500 meters, what would the air pressure outside the plane be?When you fly that high, why might your ears "pop"? Energy in Earth's Atmosphere Which two types of surface on Earth are most important for absorbing solar energy and keeping the planet warm.EXPLAIN WHY. Why would skiers often get sunburned even in the winter when the sun's rays are not very strong? What effect would thick cloud cover have on the temperature of Earth's surface? EXPLAIN YOUR ANSWER. Why might a major volcanic eruption lead to cooler temperatures over a large area around a volcano? Which do you think would be warmer on a winter day when there is no wind - a thick forest or a grassy field?EXPLAIN YOUR ANSWER.