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Port Said International Schools
Science department
Grade: 6
Worksheet 7
Name: ………………………………………. Date: ……………………………………………………
Complete the following:
1- Nitrogen gas is a chemical ……………….
2- The chemical symbol of the nitrogen gas is …………………….
3- The nitrogen molecule consists of ……………….. atom(s).
4- Legumes such as ……………….., …………………. and ………………….. produce
proteins by the help of …………………….. which live on their roots.
5- Nitrogen is collected by displacing …………………. downwards.
6- When nitrogen combines with lighted magnesium ribbon ……………….. substance is
formed, by adding water a pungent smell of …………………… emits.
Give a reason for the following:
a. Concentrated sodium hydroxide plays important role in preparing nitrogen.
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b. Heated copper is important in the preparation of nitrogen.
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c. Nitrogen is collected by displacing water downwards.
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d. Nitrogen is used in filling car tires.
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Choose the correct answer:
1. Nitrogen is used as (active – inactive – strong – no correct answer) material in the tanks
of liquefied explosives.
2. A lighted magnesium ribbon keeps burning in a cylinder filled with (oxygen – nitrogen –
carbon dioxide – all the previous).
3. Nitrogen is used in making (stainless steel – gunpowder – fertilizers – all the previous).
Correct the underlined word:
a. Dry ice is used as a treatment to skin tumors.
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b. Nitrogen helps in burning.
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c. Nitrogen oxides are formed in the atmosphere during thunder.
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