Composition of Air

The gas that does not involve in respiration of humans is_____.  

Write two physical properties of nitrogen gas.

The percentage of nitrogen in the air is_____.

The major part of the air which does not support combustion is

The main component of air is oxygen.

If the given pie chart represents the composition of air, which part of the chart represents nitrogen, oxygen and other gases.

Draw any two things that give out smoke. How do you think smoke make affect us?

Fill in the blank to complete the words. Circle them in the word search.

Air is needed to light a F_R_  

Fill in the blank using the right word from the bracket given below.

(three, blue, cloud, ice)

Evaporated water becomes a _____.

Why your mother blows a pipe into the firewood stove to burn firewood.

 
Place a lighted candle on the table-top as shown in the picture. Cover the lighted candle with a glass tumbler. Why is the candle flame put out?

Place a lighted candle on the table-top as shown in the picture. Cover the lighted candle with a glass tumbler. What happens to the candle flame?

Look at the picture. The firewood stove has ember but it is not burning. What trick does your mother use to burn the firewood?

Do fuels burn on their own? 

A gas used in brightly coloured lights is

State the uses of carbon dioxide.

Fertilisers are prepared from:

State the uses of nitrogen and oxygen.

State the names of five rare gases in the air.

Name the following.
The gas in the air that absorbs infrared radiation.