Air pressure lab worksheet

Air Pressure Lab Worksheets & Teaching Resources Tp

91. $5.00. Zip. Google Apps™. Air Pressure Lab - Students will love you for providing them with a hands-on experience when learning about low and high air pressure.The air pressure station lab is a plug and play unit that is meant to accompany my FREE Kesler Science Station Lab Series. Download that start-up guide to learn more Air pressure changes are related to changing weather conditions. In this lab, you will build and use your own barometer to measure air pressure. Problem How can a barometer detect changes in air pressure? Materials modeling clay white glue pencil metric ruler large rubber balloon drinking straw, 12-15 cm long cardboard strip, 10 cm × 25 cm. Earthlabs: Investigating Hurricanes - Lab 5 Page 6 of 8 Calculation of Atmospheric Pressure: Because the pressure is the same on both sides of the ball after the water has leaked out, that means that: P1 + ρgD = Atmospheric Pressure Where P1 is the air pressure in the bottle, ρ is the density of water, g is the acceleratio 2. $1.00. PDF. This worksheet serves as a great resource for reinforcing line graphs and air pressure. Students will use a data table to graph air pressure against elevation. There are also 7 questions for them to answer based on the graph and what is learned in class Student Activity 2: Air Pressure and Altitude. For grade 6 students: Rather than demonstrate the squares to the students, have them measure their own 1 x 1, 2 x 2, 3 x 3, and 4 x 4-inch square and find the pressure. The average surface area for an elementary school student is about 2,000 in 2. Rather than telling students this information, have.

Station 1: Air pressure on a pop can. Measure and record the height and diameter of the can. Put a small amount of water in the bottom of the can, just enough to cover the bottom. Wearing goggles and an oven mitt, place the can on the hot plate or use the tongs to hold the can over the heat source you lower the air pressure (because the air is moving faster), and thus the pressure on the underside of the sheet is now higher, and higher air pressure pushes the sheet upwards. Kissing Balloons Blow up two balloons. Attach a piece of sting to each balloon. Have each hand hold one string so that the balloons are at nose-level, 6 apart. Blo View Air_Pressure_ESRT_13_14_Worksheet.pdf from ENV SCI 101 at Buffalo High School, Buffalo. REGENTS EARTH SCIENCE Air Pressure Worksheet Lab 42 Name Date Period Activity 1: Use the Selecte Wind and Air Pressure Class The map below shows wind direction and air pressure for several different weather stations. Connect the areas of equal air pressure on the map to form isobars. Label each isobar with the correct air pressure. You should have an isobar for each of the following pressures: 996, 1000, 1004, 1008, 1012, and 1016 millibars d) Air Pressure: weight of the air on the ground measured in millibars or inches of mercury using a barometer i) ESRT page 13: air pressure conversions ii) Isobars connect equal air pressures on a map iii) High pressure: cool and dry (heavy, sinking air); spins outward & clockwis

You will now fill in the data table with Density, Pressure, and Temperature for each of the 11 altitudes (0,5,10, . . . 400) Set altitude. one at a time for each of the 11 altitudes with the red slider arrow, then . Launch. the balloon or rocket and . Record. the data on the data chart. Altitude Density (% of Sea Level Density) Pressure (Pa. Demonstration of Rising Water Activity Air cools when the flame goes out. The not change. molecules slow down and air pressure decreases. Water vapor condenses to moisture on the glass, causing lower air pressure. Outside air pressure does To reach equilibrium, the area must decrease, so the water rises into the glass Air Front Notes → 1 0 Mi n u tes → Pa g e 7 Watch the air front notes. Make sure you follow along. Air Front Workshe et → 5 Mi n u tes → Pa g e 8 Complete the air front worksheet Air Masses and Fr o n ts Revi ew W o rksh eet → 7 Mi n u tes → P ag e 9 Complete the air masses and fronts review What Is Air Pressure? (Grades 6-12) After matching terms with their definitions in this worksheet about air pressure, students will interpret diagrams and apply the formula p=F/A to calculate the amount of pressure an object exerts

Lab 5: All About Air Pressure. The lab activity described here was created by John McDaris of SERC for the EarthLabs project. Summary and Learning Objectives. Students select a storm from the HURDAT database and create its track in the easy-to-use online tool, Google Maps. The visualization they produce details the location and intensity of. Surface air pressure map. This map shows the sea-level pressures for various locations over the contiguous U.S. The values are in whole millibars. Using a black colored pencil, lightly draw lines connecting identical values of sea-level pressure. Remember, these lines, called isobars, do not cross each other

The result is the pressure of the air pushing from the outside of the can is great enough to crush it. The sudden collapsing of an object toward its center is called an implosion. Nature wants things to be in a state of equilibrium or balance. To make the internal pressure of the can balance with the external pressure on the can, the can implodes Intraocular Pressure Sensor Design Challenge Activity—Under Pressure WebQuest Worksheet Answer Key 3 22. How is the pressure of a gas or liquid determined with this pressure gauge? The gas or liquid travels into a flat tube. The pressure from the gas or liquid straightens out the tube. This causes the needle to move Weather Variables: Air Pressure, Temperature & Density - Quiz & Worksheet Chapter 20 / Lesson 3 Transcript Vide This awesome air pressure science experiment! In this silly activity, kids will learn some fundamental principles of physics without any technical worksheets. Children will have so much fun that they'll be excited to do more experiments at home or in their school science lab

About This Quiz & Worksheet. Figuring out how a change in gas pressure or the volume of gas in a space can affect the world around you can be important. So take this quiz that discusses a lab. Welcome to The Lab Report, sponsored by Apologia Science. This week, we have a fun air pressure experiment to teach your kids what air pressure is and how it works. Just gather a few simple materials to get started. Air Pressure Experiment Supplies glass jar with a lid a drinking straw molding clay a marshmallow sharpie marker Air Pressure Experiment Instructions My daughter loves this one, so. Most books will tell you that the paper burned up the oxygen, lowering the air pressure inside the bottle, and that the greater air pressure on the outside of the bottle pushed the egg inside. They get the part about the air pressure right, but the lowered pressure in the bottle is not due to burning up the oxygen Class Activity. Tell students that today they will be learning about pressure systems and fronts and how they affect local weather. Show the video using the provided link (stop at 1:31) or demonstrate how air pressure crushes a soda can. Student Activity. Post the words high pressure and low pressure on the board In this case, the force of air pressure pushing up on the cardboard is greater than the force of gravity pulling the cardboard down. #3: Why can't you blow up the balloon? For this activity, you will need a balloon and a large plastic bottle (a 2 liter soda bottle would work well). Prepare this activity by inserting the balloon into the bottle

This change, in turn, caused the air pressure inside the can to be much lower than the air pressure outside, and the weight of the air outside crushed the can. 5. Magic Egg Experiment. This experiment involves using the force of air pressure to push an egg through the neck of a bottle. Gather the following materials to perform this experiment Air Pressure Can Crusher Experiment. The pressure created in the air surrounding us plays an important role while doing this activity. Objective: To crush the empty soda can and explore simple science concepts like air pressure, equilibrium, water vapor, condensation, and unbalanced forces. Hypothesis: If water in a can heated to reach its boiling point and then dipped by inverting in a cold. The ordinary pressure of the air surrounding us is 14.7 pounds per square inch, but the pressure can change when the wind blows or an object, like a car or airplane, accelerates. One important principle to remember is that wherever the air pressure is higher, there will be a stronger force or push against an object Pressure Activity scaffolding activity Introduction: Though you may not realize it, the air has weight. All the air molecules in the atmosphere exert a force, or pressure, on our bodies. Atmospheric pressure is the force exerted by the weight of the air above an object or surface. Variations in pressure generate winds, which play a significant. Lab Exercise 7 • 109 Figure 7-1 Atmospheric pressure profile graph—the standard atmosphere—from the surface to 70 km. 1. Using the graph in Figure 7-1, plot this standard atmosphere of air pressure decrease with altitude presented in Table 7-1

Complete the Global Winds and Pressure Belts diagram below. 1) Put an H or an L in each box on the right side of Earth indicating the air pressure at that Pressure Belt. 2) Write the name of the Pressure Belt on each line of latitude (the lines for the Poles are next to the box) Air, like water, is a fluid; however, unlike water, which is a liquid, air is a gaseous substance. Air is considered a fluid because it flows and can take on different shapes. Bernoulli asserted in Hydrodynamica that as a fluid moves faster, it produces less pressure, and conversely, slower moving fluids produce greater pressure

Air Pressure Worksheets Teachers Pay Teacher

Lab Vent Controls Lab Balance Worksheet. Lower pressure drop design where possible - Ventilation transfer air from write up rooms to lab space - VAV fume hoods with Zone Presence Sensors for: Airflow reduction, diversity and compliance management - Comprehensive ventilation strateg 4. The pressure scale on a tire gauge is marked in units of pounds per square inch (psi). The scale starts at zero when the gauge is exposed to the surrounding air. This means that the total pressure is equal to the gauge pressure plus the pressure of the surrounding air. Standard atmospheric pressure (1 atm) is equal to 14.7 psi Lesson 5: Air Masses on the Move 135k: v. 1 : Jan 12, 2012, 6:41 AM: Jessica Cellitti: ĉ: AtmosphericPressureOnlineLab.docx View Download: Lesson 1: Atmospheric Pressure Online Lab Lesson 3-4: Ocean Current Worksheet.

Air pressure is the force of these collisions per unit area. In fact, we often measure pressure in pounds per square inch (psi). This activity helps students understand pressure and changes in pressure by experiencing air pressure in a new way. What causes a person to be shrink-wrapped when the vacuum is turned on Activity 1-Hurricane Ike Air Pressure & Wind Speed Lab (by James Rice) HERE Activity 2 - Ozone Lab (by Chris Sheehan) HERE Activity 3-Absorption of Radiation by land & water Lab (by Sharon Woelfel) HERE Activity 4-Station Model Lab (by Howard Barnes) HERE Activity 5-Virtual Courseware: Global Warming Work through the main activities and the. Lab 1A.docx - 1A Surface Air Pressure Patterns and Winds \u2022 \u2022 1030 \u2022 1035 \u2022 1037 \u2022 2 \u2022 3 \u2022 4 \u2022 5 \u2022 1004 \u2022 1006 \u2022 1008 \u2022 1012 \u202

Can you feel the pressure? The atmospheric pressure that is. The air in our atmosphere is constantly pushing on us and everything else, for that matter. There is even air pressure inside your body pressing outward. The air pressure inside your body counteracts the air pressure outside your body. This is how it is with most things in earth Learn about air pressure, of course! This fun science experiment shows kids how air pressure works, and what happens when the air pressure inside a jar is changed. RELATED: 25 Educational Websites for Online Science Learning. This science activity is perfect for preschool and kindergarten children Clouds on Earth form when warm air rises and its pressure is reduced. The air expands and cools, and clouds form as the temperature drops below the dew point. Invisible particles in the air in the form of pollution, smoke, dust, or even tiny particles of dirt, become a nucleus on which the water molecules can attach themselves and go from. Air pressure in this set up is supplied by an air jet in a lab. Feed sand down to the eruption using the funnel. Gravity will help pull the sand down the tube. If the tube gets clogged tap it with your fingers or a pencil. Keep the tube as dry as possible. Here is an alternative set up. Air pressure is supplied by a can of compressed air

Air Pressure Experiments: I Can't Take the Pressure

Module 5 Lab Worksheet - Module 05 Lab Worksheet

Lab 5: All About Air Pressur

atmospheric pressure MATERIALS: worksheet BACKGROUND: Atmospheric pressure moves weather systems. Cold air is more dense than warm air causing what is called high pressure. Warm air which is lighter cause low pressure. In the area of higher pressure the air molecules are closer together than they are in an area of lower pressure A barometer is an instrument used to measure air pressure. One way air pressure is measured is in inches of mercury. Air pressure is highest as sea level, making the air also heaviest. At sea level, air pressure is 29.53 inches of mercury. This means that at sea level, it takes 14.7 pounds of pressure per square inch of air to raise mercury in.


  1. Activity written by Kathryn Danielson and Clea Matson from California Academy of Sciences . Air Pressure Activity In this activity, students are asked to create a change in air pressure using a garbage bag and vacuum cleaner, then create an illustration, model or concept map that explains what is happening
  2. Pressure and Wind Virtual Lab - wireframe. Wireframe for Virtual Lab concept for teaching about Air Pressure and Wind. Click the Next Lab button in the lower right corner to cycle through the sections of this Virtual Lab
  3. Highlighting the concepts of air pressure and temperature in cloud making, this experiment uses a burnt match and some water to create a cloud inside of a plastic bottle. Due to the use of matches an adult is necessary
  4. The invisible air pressure around us is always changing, but try explaining that to the tot lot. We've found a seeing-is-believing DIY barometer experiment to turn the tides for your tiny skeptic. Not only will you reveal ever-changing air pressure, but you can also predict any summer storms heading your way
  5. Air pressure: Air pressure variation with altitude is much simpler than temperature variation. Standard pressure at sea level is defined as 1 atmosphere ( = 1013 millibars = 14.7 lb/in 2 = 101.3 kilopascals). Pressure drops steadily with altitude; at roughly 5,500 meters it is down to 1/2 of the sea level value
  6. In this video Sylvia Knight demonstrates an experiment that explains air pressure. For more details on this experiment as well as many others, visit http://w..
  7. Jared demonstrates a simple experiment designed to help young learners explore how air and pressure are related.Check out more videos like this on our channe..

Science Max Volume, Mass and Density. YouTube- Elements in the human body. YouTube- Elements in the human body (great) YouTube- Earth's Elements. Elements, mixtures and compounds lab. Online air pressure lab. Phet- Changes of States. Animation of changing states of matter. Animation- states of matter and physical/chemical changes Fill each of the six cups with the same amount of water. Adding food colorings into the cups, one color in each cup. Line up the cups from left to right. In the first cup, do not add any sugar. In the second cup, add one tablespoon of sugar. In the third cup, add two tablespoons of sugar. In the fourth cup, add three tablepoons of sugar, and so on Gas Law Simulator Multiple Panels - pressure, volume, temperature, kinetic energy, and RMS velocit

What Is Air Pressure? Math & Earth Science Printable (6th

The air pressure at sea level at a temperature of 59°F (15°C) is equal to one atmosphere (Atm) and this is the baseline reading for determining relative pressure. Atmospheric pressure is also known as barometric pressure because it is measured using a barometer. A rising barometer indicates increasing atmospheric pressure and a falling. Teaching students about air pressure can be challenging as you need to give them multiple opportunities to look for evidence of air pressure around them. In this series of activities students make observations to show how air pressure is that work in a variety of situations. To set this activity up I suggest that you set up stations around the. atmosphere, air mass, air pressure, condensation, evaporation, high pressure system, humidity . Learning Activity 5: What Moves Air Masses Learning Activity 6: Clouds & Their Formation Learning Activity 7: Clouds & Weather Learning Activity 8: The Water Cycle & Weathe It is because of Bernoulli's principle. The fast-moving air, which carries the ball into the air, is at a lower pressure than the air surrounding the ball. As the ball is trying to fall off the fan, this surrounding higher-pressure air pushes the ball back into the area of lower pressure above the fan. As a result, the ball stays afloat on top. Can students relate air pressure (14.7 lbs/in 2) to a force when applied over an area? Common Misconceptions: Since students don't experience pressure's effects often they overlook it. The quantitative value of air pressure, 14.7 lbs/in, seems small and unable to have an effect. Steam is not a gas. Gases exert little pressure

MS-ESS2-5 Collect data to provide evidence for how the motions and complex interactions of air masses results in changes in weather conditions. Clarification Statement: Emphasis is on how air masses flow from regions of high pressure to low pressure, causing weather (defined by temperature, pressure, humidity, precipitation, and wind) at a fixed location to change over time, and how sudden. METEOROLOGY: WEATHER SYSTEMS Use the links below to explore available resources covering major concepts associated with the study of the weather systems. Resources in this section pertain to the formation and movement of pressure systems, air masses, and fronts, the formation of global wind patterns, and the evolution and motions of major storms including hurricanes and mid-latitude cyclones Learn about air pressure. The air around you is pressing against you and every other object, with a pressure as high as 101 kPa (14.7 pounds per square inch) when you're at sea level. This would normally be enough to crush a can by itself, or even a person The key to forecasting the weather is knowing how large bodies of air with similar temperature and pressure properties (air masses) react to different environmental conditions. These air masses set up weather conditions. Of course, many environmental factors such as wind patterns, wind direction, or seasonal changes, affect the weather, too All About Air Experiments | Steve Spangler Science Lab. 35+ Air Science Experiments for Kids! When you explore the properties of air, you discover that air occupies space, has weight and exerts pressure. Article by Steve Spangler Science. 530

The pressure inside a well-sealed (wet) suction cup is very low, so the force you exerted was almost exclusively counteracting the ambient air pressure. We can determine the magnitude of air pressure at ground level from the suction cups. Start by measuring the diameter of your smallest suction cups. Calculate the area of the suction cups: and. Station Model Lab - 2 - ©HGB 3/27/2000 Procedures Air Pressure: when coding air pressure on a station model, use the following rule: a. if the air pressure on the station model is 500 or more, place a 9 in front of this number. Also put a decimal point in front of the last number EX: 588-- 958.8 millibars b standard air pressure in millibars is 1013.2. Weather maps showing the pressure at the surface are drawn using millibars. Although the changes are usually too slow to observe directly, air pressure is almost always changing. This change in pressure is caused by changes in air density, and air density is related to temperature 12. On a particular day, the air pressure in the chemistry lab is 1.137 atm. Discuss with your group how you might perform the following calculations, and then do them. Show your work so that you can refer back to these calculations later. a. What is the partial pressure of oxygen in the room on that d

Solved: Lab 13 Studying Boyle's Law CALCULATIONS Do The Fo

Lab 5: All About Air Pressure - Carleton Colleg

In this lab you will examine a model you create by observing surface pressure readings from weather stations and then identifying relationships that exist between wind and atmospheric pressure. Air pressure is determined by the weight of the overlying air, and it varies from place to place and over time. Surface air pressure is the forc Lab Week 3 - Vapor Pressure and Supercooling PART 1: Vapor Pressure Calculations 1) The atmosphere exerts a pressure on the material sitting within it. While we often think of that pressure as a single value, we can also think of it in terms of partial pressures - the effectiv

Gases and gas laws/Boyle's law lab - Wikiversity

lab book. b) For the second graph, plot pressure versus altitude data. Insert the graph in your lab book. c) Does the shape of either graph differ from what you predicted in Question 1? If so, how? 3) Compare the ways in which air temperature and air pressure change with increasing altitude 1. A gas occupies 12.3 liters at a pressure of 40.0 mm Hg. What is the volume when the pressure is increased to 60.0 mm Hg? 2. If a gas at 25.0 °C occupies 3.60 liters at a pressure of 1.00 atm, what will be its volume at a pressure of 2.50 atm? 3. A gas occupies 1.56 L at 1.00 atm. What will be the volume of this gas if the pressure becomes 3. Air, like water, is a fluid; however, unlike water, which is a liquid, air is a gaseous substance. Air is considered a fluid because it flows and can take on different shapes. Bernoulli asserted in Hydrodynamica that as a fluid moves faster, it produces less pressure, and conversely, slower moving fluids produce greater pressure. Img. inspection or servicing include: drain lines, air-line particulate filters, safety devices, air filters, condenser coils, etc. 10. Before conducting any repairs to the pressure system of air compressors, receivers or compressed air equipment, ensure all hazardous energy sources are locked and tagged out, and all pressure has been released the air pressure is lowered quickly, and the extra nitrogen expands and comes out of the blood as bubbles. Boyle's Law 4 For evaluation purposes only Pre-Lab Discussion and Activity Engage students in the following discussion or activity. Show the class the simple Cartesian diver (refer to the Preparation and Tips section). Have on

Learning Lesson: Drawing Conclusions - Surface Air

  1. Air pressure _____ as elevation increases. A. decreases B. increases C. stays the same . 2 _A_ 18. The gas that is second in abundance in the atmosphere is A. oxygen B. carbon dioxide C. nitrogen D. water vapor _C_ 19. What is the formula for ozone? A. O B. O 2 C. O 3 D. O 4 _B_ 20. Our atmosphere is only made up of gases, no solids or liquids..
  2. Lab 3. General Circulation of the Atmosphere. Topics to be discussed • Pressure • Pressure Gradient Force • Coriolis Force • General Circulation Patterns. 1. Pressure • What is air pressure? Air pressure is the force exerted by the weight of a column of air above a particular location
  3. utes (depending on availability of materials
  4. The low pressure center is near which city? 2. The high pressure center is near which city? 3. What is the highest air pressure on the map [be sure to convert the shorthand form]? 4. As you travel fro Salt Lake City to Seattle, what change in air pressure would you observe? Leigh-Manuell - 4 Lab Activity: Weather Variable
  5. e the maps and think about what is occurring. Then answer the following questions. 1
  6. The high pressure did not allow any clouds that tried to form from reaching high into the atmosphere, condensing, and precipitating in our area. This persisted for months, causing a severe drought. Lamp, Smoke and ice cubes lab adapted from a lesson found atscience-class.net - 2002 . Atmosphere. Cloud(( Cloud. High Pressure. Low Pressure

Air Pressure Can Crusher Science Experimen

How does air pressure affect a balloon? Air pressure inside the balloon is created depending on many factors. 1) Balloon Size 2) Volume inside the Balloon 3) Material of the Balloon. If the balloon volume is more, then the pressure created inside the balloon decreases. And if the balloon made out of elastic material, then the air pressure. Units of Atmospheric Pressure • Pascal (Pa): a SI (Systeme Internationale) unit for air pressure. 1P f f1 i f f1 Pa = a force of 1 newton acting on a surface of one square meter 1 hectopascal (hPa) = 1 millibar (mb) [hecto = one hundred =100] • Bar: a more popular unit for air pressure. 1 bar = a force of 100,000 newtons acting on a surface. Virtual Lab Blood Typing Video Lab Lung Capacity Determining Blood Type 868 Unit 9: depending on your activity. This section gives you an overview of the and the air pressure decreases, falling below the air pressure outside your body. Gases move from areas of greater pressure to areas of lower pressure, so air flows into the lungs.. At this point, the air pressure inside the jar is the same as the air pressure outside. So the balloon will continue to sit at the opening without moving. When you drop a lit match into the jar, the air inside heats up and expands quickly. If the fire is big enough, the expanding air will try and push the water balloon aside to escape from the jar Pump gas molecules to a box and see what happens as you change the volume, add or remove heat, and more. Measure the temperature and pressure, and discover how the properties of the gas vary in relation to each other. Examine kinetic energy and speed histograms for light and heavy particles. Explore diffusion and determine how concentration, temperature, mass, and radius affect the rate of.

Quiz & Worksheet - Air Pressure, Temperature & Density

What is Air Pressure? Activity Education

  1. Properties of air worksheet. Saved by aish ashu. 145. Classroom Tools Worksheet Template Worksheets For Kids Science Education Earth Science Lessons Science Teaching Resources Teaching Science Science Worksheets Biology Worksheet
  2. Step-by-Step Directions. Inflate the two balloons until they are equal in size and tie them off. Attach a piece of string to each balloon. Then, attach the other end of each of the strings to the opposite ends of the ruler. Keep the balloons the same distance from the end of the ruler. The balloons will now be able to dangle below the ruler
  3. Fill the bottle with water all the way to the top. Fill the diver with just enough water so that it barely floats on the surface. When the bottle is squeezed, the pressure increases on the air trapped in the diver. When the density of the air (gas) changes (increases), the diver sinks to the bottom (whether the bottle is sealed or not)
studylibMarshmallows: The Perfect Media for Demonstrating35 Label Global Winds Worksheet - Labels Database 2020General Chemistry - Unit 2 Worksheet 2 Measuring Pressure

Animated Gas Lab. The Animated Gas Lab is a series of computer animations which demonstrate all the possible combinations of the ideal gas law or equation of state. Gases have various properties which we can observe with our senses, including the gas pressure, temperature, mass, and the volume which contains the gas LAB ACTIVITY: RADIATIVE HEATING OF LAND AND WATER Radiation from the sun heats up Earth's landmasses and oceans. The weather and climate on Earth are directly dependent on this heat energy transfer, and so are all the phenomena that accompany weather, such as winds, tornadoes, hurricanes, rain, snow, and ocean waves 2) Calculate the partial pressure of H2 gas. Use Dalton's law of Partial pressure. Check chart at 23 oC. Barometric = total pressure (735 mmHg) 735 mm Hgtotal - 21.1 mmHg H2O = 713 mmHg H2 . Used combined gas law to convert gas volumes to those at STP. P1V1/T1 = P2V2/T2 ( let STP be 2nd conditions V2 = P1V1T2/T1P A large body of air with the same characteristics of temperature and moisture content is known as an air mass. An air mass receives its characteristics from the location it forms, know as its source region. Fronts represent the advancing edge of the air mass at ground level.Only low pressure systems have fronts, due to air masses converging at the low pressure

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