What is air grade 1?

Air is a tasteless, odorless and invisible mix of gases that is primarily made up of oxygen and nitrogen. There are layers of air that cover the earth, which is known as the atmosphere. All over the world, there are large and small bodies of air called air masses that remain about the same temperature and moisture.

What is the simple definition of air for Primary 1?

Air is a mixture of gases like oxygen, nitrogen and carbon dioxide in higher proportions and much smaller levels of argon, water vapor, and other gases. Living things live and breathe in the clear gas. It has an indefinite shape and volume. It has no color or smell.

What is air class 2?

Note: Air is a mixture of gases like nitrogen, carbon dioxide, oxygen, etc.

Why do we need air Class 1?

We need air to live and breathe. Plants and animals also need air for life. If a plant is kept inside a closed jar, it is observed that it dies due to the absence of air. Animals also die without air.

What will happen if there is no air Class 1?

Without atmosphere life would not be possible as atmosphere protects us from harmful gases. We could not live without air present in atmosphere. In absence of the atmosphere, the earth would get so cold at night that we would not be able to survive.

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What is air made up of Class 1?

Air is made up of different gases like nitrogen, oxygen, carbon dioxide and other inert gases.

What is air for Grade 3?

Air is a mixture of gases such as nitrogen, oxygen, carbon dioxide and other gases. All living things need oxygen to live.

What is air Class 1 vs 2?

Class 1: Air with low contaminant concentration, low sensory-irritation intensity, and inoffensive odor. Class 2: Air with moderate contaminant concentration, mild sensory-irritation intensity, or mildly offensive odors.

What is air grade 4?

Air is a natural virtue on earth which sustains life. It exists in the atmosphere and it basically contains a mixture of numerous gases like oxygen, nitrogen and carbon dioxide in higher proportions and much smaller levels of argon, water vapour, and other gases.

What is air in easy words?

Air is the invisible mixture of gases that surrounds Earth. Air contains important substances, such as oxygen and nitrogen, that most species need to survive. Human beings (Homo sapiens), of course, are one of those species. Sometimes, the word "atmosphere" is used instead of the word "air."

What is a simple definition of air?

: the mixture of invisible odorless tasteless gases (such as nitrogen and oxygen) that surrounds the earth. also : the equivalent mix of gases on another planet.

What are 5 facts about air?

What is air and example?

The mixture of gases that makes up the Earth's atmosphere is known as air. Nitrogen makes up 78 % of this gas, which is mixed with oxygen (21%), water vapour (variable), argon (0.9 %), carbon dioxide (0.04%), and trace gases. There is no apparent scent or colour in pure air.

How do you teach air?

What is air and wind for kids?

wind is moving air air is made up of gas. air can push and squeeze that's called air pressure warm. air rises and cool air sinks wind speed is measured with an anemometer wind direction is measured with a wind vane.

What is a Class 1 air area?

Class 1 federal lands include areas such as national parks, national wilderness areas, and national monuments. These areas are granted special air quality protections under Section 162(a) of the federal Clean Air Act.

What are examples of Class 2 air?

Class 1 air can be recirculated to any space type. Class 2 air is considered moderately contaminated or odorous and is restricted in its recirculation. Examples of Class 2 air zones include daycare facilities, dining areas, retail sales areas, and fitness facilities.

How is air best classified?

Answer and Explanation: The classification of air is done as a mixture. In the atmosphere, there are a number of gases such as argon, carbon dioxide, nitrogen as well as oxygen.

What is air in English for kids?

Air is a tasteless, odorless and invisible mix of gases that is primarily made up of oxygen and nitrogen. There are layers of air that cover the earth, which is known as the atmosphere.

What are 3 types of air?

Equatorial air masses develop near the Equator, and are warm. Air masses are also identified based on whether they form over land or over water. Maritime air masses form over water and are humid. Continental air masses form over land and are dry.

Why is air matter for kids?

But, like solids and liquids, air is matter. It has weight (more than we might imagine), it takes up space, and it is composed of particles too small and too spread apart to see. Air, a mixture of gases, shares properties with water vapor, the gaseous form of water that is part of air.

What makes air unclean for grade 1?

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. The solid and liquid particles suspended in our air are called aerosols.

What is air class 6?

Air is a mixture of nitrogen, oxygen, carbon dioxide, water vapour and a few other gases. Some dust particles may also be present in it.

What is air class 8?

Air is a very important element in the atmosphere which makes this Earth livable for us. It consists of a mixture of gases which by volume are – about 78% of nitrogen, about 21% is oxygen and carbon dioxide, argon, methane, ozone and water vapors in very small quantities.