(dust, atmosphere, mixture, motion, dissolved, oxygen).

1. Air is not one substance but a .
2. When air is in it is called wind.
3. Our earth is surrounded by
4. The aquatic animals use oxygen in the water for respiration.
5. Air contains particles.
6. The component of air that supports burning is called

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Solution

1. Air is not one substance but a mixture.
2. When air is in motion it is called wind.
3. Our earth is surrounded by an atmosphere.
4. The aquatic animals use dissolved oxygen in the water for respiration.
5. Air contains dust particles. The component of air that supports burning is called oxygen

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Similar questions

Q. Fill in the blanks with appropriate words: (dust, atmosphere, mixture, motion, dissolved, oxygen).

1. Air is not one substance but a ……………………..
2. When air is in ………………. it is called wind.
3. Our earth is surrounded by ………………………...
4. The aquatic animals use ………………. oxygen in the water for respiration.
5. Air contains ………………… particles.
6. The component of air that supports burning is called …………………

Q. Write True (T) or False (F) against the following statements in the given brackets:
1. Plants need oxygen to prepare food during photosynthesis. ( )
2. Aquatic animals use dissolved oxygen from water. ( )
3. Moving air is called wind. ( )
4. Soil does not contain air. ( )
5. Atmosphere is essential for sustaining life on earth. ( )

Q. (1)

Make sentences using the given set of words.

(a) 99%, oxygen, nitrogen, air, together

(2)

Make sentences using the given set of words.

(b) Respiration, dissolved, animals, air, aquatic

(3)

Make sentences using the given set of words.

Q. Assertion :Respiration in animals is more affected than in green plants by the increasing effects of air pollution and decreasing oxygen content in the inhaled air. Reason: The source of oxygen for respiration in green plants is atmospheric air and oxygen from photosynthesis.

Ordinary air from the atmosphere contains about 21% of oxygen whereas the dissolved air in river water contains about 30%. Give a reason for this.

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1. Air is not one substance but a mixture. 2. When air is in motion it is called wind. 3. Our earth is surrounded by an atmosphere. 4. The aquatic animals use dissolved oxygen in the water for respiration. 5. Air contains dust particles. The component of air that supports burning is called oxygen

1. Air is not one substance but a mixture.
2. When air is in motion it is called wind.
3. Our earth is surrounded by an atmosphere.
4. The aquatic animals use dissolved oxygen in the water for respiration.
5. Air contains dust particles. The component of air that supports burning is called oxygen