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Why does exhaled air have a different concentration of carbon dioxide than classroom air or air near a plant?
stomata in the leaves
carbon dioxide is heavier than air.
Why would exhaled air or air near a fern plant have a different concentration of carbon dioxide than classroom air?
Air is altered by respiration (in animals) and photosynthesis (in plants). When humans breathe in classroom air, its contains about 21% oxygen and 0.03% carbon diox…ide. In the lungs, oxygen is removed from the air and taken into the blood. The oxygen is used in the process of respiration to release energy from food. One of the waste products of respiration is carbon dioxide. At the same time as we absorb oxygen into the blood, carbon dioxide passes from the blood into the air in the lungs. The air we breathe out (exhaled air) therefore contains less oxygen and more carbon dioxide than normal clasroom air. During photosynthesis plants use up carbon dioxide and produce oxygen. Therefore, near a plant which is photosynthesising, the level of carbon dioxide could be reduced because it is being removed by the plant. For a simple comparison of inhaled and exhaled air see: http://www.bbc.co.uk/schools/ks3bitesize/science/biology/gas_3.shtml For an experiment demonstrating carbon dioxide production see: http://www.biotopics.co.uk/humans/inhaledexhaled.html For an introduction to photosynthesis see: http://www.bbc.co.uk/schools/gcsebitesize/biology/greenplantsasorganisms/0photosynthesisrev1.shtml
Composition of outer or inhaled air: O2 - Oxygen 158 mm Hg (20.9%) CO2 - Carbon dioxide 0.3 mm Hg (0.04%) H2O - Water 5.7 mm Hg (0.75%) N2 - Nitrogen 596 mm Hg (78.4%) Comp…osition of the expired air: O2 - Oxygen 116 mm Hg (15.3%) CO2 - Carbon dioxide 32 mm Hg (4.2%) H2O - Water 47 mm Hg (6.2%) N2 - Nitrogen 565 mm Hg (74.3%)
It was because plants need carbon dioxide to make food. Without food the plants will die .
When we inhaled, we use the oxygen in the air to send to the organs in our body, in order to stay alive. When all the oxygen stored in a red blood cell is used up, our bodies …convert it to carbon dioxide, and this is part of the air which we exhaled.
because carbon dioxide and water from the cells are waste carried by the blood to the lungs to be taken out of the body
The air that you exhale is made up of approximately 16% to 17% oxygen and about 4% to 5% carbon dioxide. (inhaled air is about 21% oxygen and only 0.04%, a fractional trace,… of carbon dioxide)
the balance of oxygen and carbon dioxide in the atmosphere is maintained through respiration in plants and animals and by photosynthesis in plants .plants produce oxygen durin…g respiration.they produce much more oxygen during photosynthesis than they consume.this is how the oxygen consumed by plants and to a large extent by animals is replenished in the air through photosynthesis
plants return carbon dioxide back in the air by the process Photosynthesis. Thanks hope you like =))
Carbon dioxide is denser than air. The density of carbon dioxide is 1,977 g/L at 0 0C and standard pressure. The density of air (the so called International Stan…dard Atmosphere) is 1,225 g/L.
There is more Carbon Dioxide (CO2) when we breathe out because some of the Oxygen (O2) is absorbed into the blood via the lungs, and CO2 is removed from the blood, into the lu…ngs. (O2 converts to CO2 in the body) However, this is only a small change so we still breathe out Oxygen: (which is why CPR works) Breathing In: 21% O2, 0.04% CO2 Breathing Out: 17% O2, 4% CO2 (about 4% change in both)
air exhaled by an animal would have slightly more CO2 Air exhaled from a plant would have slightly less.
It forms carbonic acid
Exhaled, because you breath out Carbon Dioxide and so therefore the air will contain more Carbon Dioxide rather than it been in Inhaled air. :-)
Carbon dioxide is an end product of the matabolism in humans and other higher animals. Sugars, fats and amino acids are broken down to produce energy for the body and carbon d…ioxide is an unwanted by-product which is returned to the lungs and exhaled.
Since carbon dioxide dissolves in water and forms carbonic acid, you could have water samples, one exposed only to the atmosphere, and one exposed to exhaled air, and then mea…sure their pH with a pH meter.