- What gases help burn?
- How will you prove that air supports burning with diagram?
- How can we feel the presence of air?
- Can we see air?
- What are the 5 components of air?
- Which gas present in air is essential for respiration What is its role?
- What is the importance of air?
- Why air is useful to us?
- How will you prove that air supports burning short answer?
- What are the 3 properties of air?
- How does air support life?
- How will you prove that air has oxygen?
- How can you show the presence of air in water?
- Is air present in water?
- What is the physical property of air?
- What happens because of presence of air in the water?
- Which animal uses air dissolved in water for respiration?
- How much oxygen is in the air?
- Why do we need air short answer?
- Why is air polluted?
What gases help burn?
Air contains about 21 percent oxygen, and most fires require at least 16 percent oxygen content to burn.
Oxygen supports the chemical processes that occur during fire.
When fuel burns, it reacts with oxygen from the surrounding air, releasing heat and generating combustion products (gases, smoke, embers, etc.)..
How will you prove that air supports burning with diagram?
You will find that the candle blows out after burning for some time, and the water level inside the inverted glass rises to some extent. The component oxygen of air inside the glass is used up in burning. Therefore, water occupies that space. This shows that air supports burning.
How can we feel the presence of air?
To feel the presence of air do the following things:Blow air inside a balloon . Then leave it . You an feel it by presence of touch when air is coming out of balloon.Blow air by your note book. You can feel its presence.3.BY making paper kite and trying to fly it.Riding the bicycle on windy day.
Can we see air?
So, why is air invisible? Since our eyes can only see within a very narrow range on the color spectrum, anything that we are able to see must be reflecting light that fits within that range. For air, it turns out that the colors that are able to be reflected do not lie in that visible range.
What are the 5 components of air?
By volume, dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases. Air also contains a variable amount of water vapor, on average around 1% at sea level, and 0.4% over the entire atmosphere.
Which gas present in air is essential for respiration What is its role?
OxygenOxygen is the essential component for any breathing gas, at a partial pressure of between roughly 0.16 and 1.60 bar at the ambient pressure.
What is the importance of air?
Air is important for living things. People need to breathe, and so do lots of other animals—and plants! Breathing is part of a process called respiration. During respiration, a living thing takes in oxygen from the air and gives out carbon dioxide.
Why air is useful to us?
The air gives energy for the function of living things. Plants get their food from the event of Photosynthesis. Photosynthesis happens with the help of oxygen. Nitrogen is very useful for the growth of plants as well as trees.
How will you prove that air supports burning short answer?
How will you prove that air supports burning? Answer: Take a candle and try to burn it in air. Take another candle and try to burn it while keeping it submerged in water. You will observe that, while the candle burns in air; it does not burn in water.
What are the 3 properties of air?
Lesson SummaryAir takes up space. It’s made up of atoms and molecules. … Air is made of gases, including nitrogen, oxygen, water vapor, and other materials. These substances are what give air mass.Air exerts pressure. … Air has weight. … Air can be compressed. … Air is affected by temperature.
How does air support life?
The atmosphere also helps to sustain life of Earth. It provides oxygen for humans and animals to breathe, and carbon dioxide for plants. Through the hydrological (precipitation) cycle, plants and animals receive the water they need to survive.
How will you prove that air has oxygen?
Activity: To prove that air contains oxygenTake some phosphorus in a porcelain basin.Place the basin floating on the water in a trough.Cover it with a bell jar.Note the water level in the bell jar.Burn the phosphorus carefully and close the bell jar immediately by using a cork as shown in the figure.More items…
How can you show the presence of air in water?
We can show that air is dissolved in water with the help of following activity: Take some water in a glass or metal container like pan and heat it. Just before water begins to boil, you will notice some bubbles at the inner surface of the pan. These bubbles come from the air dissolved in water.
Is air present in water?
Air is present in water and soil. Air is a mixture of nitrogen, oxygen, carbon dioxide, water vapour and a few other gases. … Aquatic animals use dissolved air in water for respiration. Plants and animals depend on each other for exchange of oxygen and carbon dioxide from air.
What is the physical property of air?
Main Physical Properties of Air are: tasteless and inodorous gas which appears colourless, except in very deep layers when a faint blue colour is visible, which has been attributed to its ozone content. Under normal conditions of 760 mm.
What happens because of presence of air in the water?
Aquatic animals breathe the air which remains dissolved in water. When water is boiled, air bubbles can be seen coming up from the bottom of the pan. This simple activity shows that air is present in water.
Which animal uses air dissolved in water for respiration?
Gills present in fish helps them to breathe in air dissolved in water.
How much oxygen is in the air?
The air in Earth’s atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen. Air also has small amounts of lots of other gases, too, such as carbon dioxide, neon, and hydrogen.
Why do we need air short answer?
Living things need oxygen to survive because we can’t survive without oxygen. It is vital that living things respire to get the oxygen for living cells to function. Without air, there is no life. Plants use Carbon Dioxide (together with sunlight and water) to produce energy and give out Oxygen as a by-product.
Why is air polluted?
The Short Answer: Air pollution is caused by solid and liquid particles and certain gases that are suspended in the air. These particles and gases can come from car and truck exhaust, factories, dust, pollen, mold spores, volcanoes and wildfires.