Air Around Us .pptx
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Air is present all around us but invisible to our eyes. Its presence can be inferred through observations like clothes swaying, fluttering pages, and bending trees during wind. Air is a mixture of gases, principally nitrogen (78%) and oxygen. Oxygen is essential for respiration and combustion, while nitrogen does not support either process. The thin layer of air surrounding Earth is called the atmosphere, which provides decreasing amounts of oxygen at higher altitudes, necessitating oxygen cylinders for mountaineers. Plants and animals both consume oxygen and produce carbon dioxide through respiration. Water vapor is also present in air and can condense into visible droplets. Smoke and dust particles are other air components. The long chimneys of factories discharge harmful smoke high into
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Power point of science 11.1.16
Air is a mixture of gases that surrounds Earth. It is composed primarily of nitrogen and oxygen along with smaller amounts of carbon dioxide, water vapor, and other gases. Air occupies space and is present everywhere, including in water and soil. While invisible, air can be detected through its effects like wind moving leaves or allowing candles to burn.
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This document provides information about the composition and properties of air. It states that air is a mixture of gases including nitrogen (78%), oxygen (21%), and trace amounts of other gases like carbon dioxide, water vapor, and argon. The layer of air surrounding Earth is called the atmosphere, which has five layers. Air has mass and weight but no color or smell. It is essential for supporting life on Earth. Experiments are described to show the presence of oxygen and dust particles in air.
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This document provides information about air and its properties. It discusses that air is a mixture of gases including nitrogen, oxygen, carbon dioxide and water vapor. It notes that air is present all around us but cannot be seen. The document outlines several properties of air such as being colorless, transparent, and lacking smell or taste. It then discusses various uses of air including for breathing, burning, filling balloons and tires, and helping birds and kites fly. The document also describes how different organisms inhale and exhale air and notes that air pollution occurs when gases, dust or smoke make the air unclean and unsafe. It lists some ways to reduce pollution and effects of air pollution on health.
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Power point of science 11.1.16
Air is a mixture of gases that surrounds Earth. It is composed primarily of nitrogen and oxygen along with smaller amounts of carbon dioxide, water vapor, and other gases. Air occupies space and is present everywhere, including in water and soil. While invisible, air can be detected through its effects like wind moving leaves or allowing candles to burn.
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This document summarizes the key components of air. It discusses that air is a mixture of 78% nitrogen, 21% oxygen, 0.04% carbon dioxide, 0.96% water vapor, and other gases. It also contains dust particles. The document then describes some activities and experiments to demonstrate the presence of air everywhere, including how oxygen becomes available to underwater plants and animals through dissolution in water. The major components of air - nitrogen, oxygen, carbon dioxide, water vapor, and dust and smoke - are then each described in more detail through explanations and additional activities.
air-160207141702 (2) (1).pptx
This document provides information about the composition and properties of air. It states that air is a mixture of gases including nitrogen (78%), oxygen (21%), and trace amounts of other gases like carbon dioxide, water vapor, and argon. The layer of air surrounding Earth is called the atmosphere, which has five layers. Air has mass and weight but no color or smell. It is essential for supporting life on Earth. Experiments are described to show the presence of oxygen and dust particles in air.
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Air Around Us
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This document summarizes 5 experiments that can be performed using common household items to demonstrate properties of air:
1. Pouring a "glass of air" by transferring air bubbles from one glass to another submerged in water, making air visible.
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Air is a mixture of gases that surrounds the Earth. It is composed mainly of nitrogen (78%), oxygen (21%), and trace amounts of other gases like carbon dioxide, water vapor, and noble gases. Oxygen supports burning and life, while nitrogen does not directly support burning or life. Air is vital for sustaining all living organisms as animals respire to obtain oxygen and release carbon dioxide, while plants photosynthesize to utilize carbon dioxide and release oxygen. The balance of oxygen and carbon dioxide in the air is maintained through these processes of respiration and photosynthesis.
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The document summarizes some key features of air through descriptions and experiments. It notes that air is colorless, odorless, and tasteless, yet has weight and fills all space. Experiments are described to show that air prevents water from passing through an upside down cup until it is tilted, and that air pressure keeps a card from sinking when placed on water in a beaker. Further experiments demonstrate air's ability to dry a coin submerged in water and how heated air in a glass lifts water. The document concludes by describing a homemade greenhouse and how it works to trap heat from the sun using aluminum foil and black cardboard around jars.
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Air is a mixture of gases that forms the Earth's atmosphere. It surrounds the planet and is found everywhere, though invisible. The atmosphere has different layers - the troposphere nearest the surface, then the stratosphere containing the ozone layer, followed by the mesosphere and thermosphere. The outermost layer is the exosphere. Air is comprised primarily of nitrogen (78%) and oxygen (21%), but also contains smaller amounts of water vapor, carbon dioxide, and other trace gases.
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The document discusses various properties of air and water. It describes experiments that demonstrate air has weight and pressure. It explains that air is a mixture of gases and atmospheric pressure is the same in all directions. The document also discusses the states of water, properties like density and freezing point, and how these properties allow aquatic animals to survive freezing temperatures. It describes the properties of soil like texture, structure and composition and how soil testing is used to determine fertility.
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The document summarizes several key properties of air through descriptions of experiments:
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Hot air balloons fly due to the scientific principle of hot air rising. Hot air is less dense than cold air, so it rises when heated by a burner below the balloon envelope. As the air inside the envelope heats and expands, it lifts the basket and passengers. Big balloons are needed to capture enough hot air to overcome the weight being lifted. The sequence of heating air, expanding the envelope, and rising continues until the pilot releases a valve to let out air and descend slowly back to the ground.
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In this presentation include the prototype drug SAR on thus or with their examples .
Syllabus of Second Year B. Pharmacy
2019 PATTERN.
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3:国家专业人才认证中心颁发入库证书
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Equivariant neural networks and representation theory
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Abstract: Equivariant neural networks are neural networks that incorporate symmetries. The nonlinear activation functions in these networks result in interesting nonlinear equivariant maps between simple representations, and motivate the key player of this talk: piecewise linear representation theory.
Disclaimer: No one is perfect, so please mind that there might be mistakes and typos.
dtubbenhauer@gmail.com
Corrected slides: dtubbenhauer.com/talks.html
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Air Around Us .pptx
- 2. 1.YOU HAVE LEARNT THAT ALL LIVING THINGS NEED AIR. BUT CAN WE SEE AIR? 2.HOW DO WE KNOW THAT AIR IS PRESENT ALL AROUND US?
- 3. THE CLOTHES HANGING ON THE CLOTHES-LINE SWAY
- 4. FLUTTERING OF PAGES OF BOOKS
- 6. WIND YOU MIGHT HAVE SEEN TREES BEND WHEN WIND BLOWS. WHAT IS WIND ? MOVING AIR IS CALLED WIND.
- 7. AIR IS PRESENT ALL AROUND US ACTIVITY 1. 1.DIP THE OPEN MOUTH OF THE BOTTLE INTO THE BUCKET OR TOUGH FILLED WITH WATER. 2.NOW TILT THE BOTTLE SLIGHTLY. 3. AND OBSERVE WHAT HAPPEN. Q.CAN YOU SEE BUBBLES COMING OUT OF THE BOTTLE. Yes Q. CAN YOU GUESS WHAT WAS IN THE BOTTLE. ‘AIR’ WHAT WE HAVE LEARNT ? AIR OCCUPIES SPACE. AIR IS PRESENT ALL AROUND US AIR HAS NO COLOUR. AIR IS TRANSPARENT.
- 8. ATMOSPHERE Our earth is surrounded by a thin layer which extents up to many kilometers above the surface of the earth called atmosphere. ATMOSPHERE
- 9. Q why do mountaineers carry oxygen cylinder with them when they climb high mountains ? As we move higher in the atmosphere, the air gets thinner and thinner that is why there is less air in higher mountains that’s why the mountaineers carry oxygen cylinder when they climb high mountains.
- 10. WHAT IS AIR MADE UP OF ? Untill eighteen century, people thought that air was just one substance. So , what is air actually made up of ? Air is made up of many gases. They are -Water vapour -Oxygen -Nitrogen -Carbon dioxide - Dust and smoke
- 11. OXYGEN Activity-2 1. Fix two candles on the table 2. Light the candles. 3. Cover one of the candle with an inverted glass tumbler or bell jar. 4. Observe both the candle carefully. Q why the candle covered with glass tumbler or bell jar got extinguished ? - The candle got extinguished because the component of air which supports burning inside the tumbler or bell jar is limited that’s why it got extinguished .. Q what is the name of that component of air ? - oxygen
- 12. NITROGEN -Nitrogen is the major component of air. -Unlike oxygen, it does not support burning -Its takes up nearly 78 % of the air.
- 13. CARBON DIOXIDE -CARBONDIOXIDE MAKED UP A SMALL COMPONENT OF THE AIR AROUND US. -PLANTS AND ANIMALS CONSUME OXYGEN FOR RESPIRATION AND PRODUCE CARBON DIOXIDE. -PLANT AND ANIMAS MATTER ALSO CONSUMES OXYGEN ON BURNING AND PRODUCES MAINLY CARBON DIOXIDE AND FEW OTHER GASES.
- 14. WATER VAPOUR Q. From where the water droplets on the outer surface of the glass tumbler comes from? When the water vapour present in air comes in contact with the cooled outer surface of the glass tumbler the water vapour condenses and drops of water appear on the outer surface of glass tumbler. Therefore water vapour is present in air. WATER DROPLETS
- 15. DUST AND SMOKE -The burning of matter produces smoke also. -Smoke contains a few gases and fine dust particles and is also harmful. Q why we see long chimneys in factories ? The long chimneys in factories take away the harmful smoke from our noses.
- 16. Exercise I 1.Which gas in the atmosphere is essential for respiration? Nitrogen oxygen carbon dioxide argon 2. Air in motion is called? atmosphere oxygen wind nitrogen 3.The layer of air around the earth is ? Atmosphere hydrosphere lithosphere space 2 1 4 3 2 1 4 3 2 1 4 3