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Air as a Mixture

.2 A list of ...

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Question 13.2

A list of words is given in a box. Use appropriate words to fill up the blanks in the following statements.

Air, oxygen, wind, water vapour, mixture, combination,
direction, road, bottles, cylinders.

Air is a ___ of some gases

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Solution

Mixture

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Question 13.4

A list of words is given in a box. Use appropriate words to fill up the blanks in the following statements.

Air, oxygen, wind, water vapour, mixture, combination,
direction, road, bottles, cylinders.

Mountaineers carry oxygen ___ with them, while climbing high mountains.

Q. A list of words is given in box. Use appropriate words to fill up the blanks in the following statements

Air, oxygen, wind, water vapour, mixture, combination, direction, road, bottles, cylinders.

(a) The makes the windmill rotate.
(b) Air is a of some gases.
(c) A weather cock shows the in which the air is moving at that place.
(d) Mountaineers carry oxygen with them, while climbing high mountains.

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 …………………

Question 1 (a)
Fill the missing word in the blank spaces in the following statements:
(a) Wind is $- --- -$ air.

Q. Fill the missing word in the blank spaces in the following statements:

(a) Wind is ________ air.

(b) Winds are generated due to ________ heating on the earth.

(c) Near the earth’s surface ________ air rises up whereas _______air comes down.

(d) Air moves from a region of __________ pressure to a region of ________ pressure.

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