Solve this-a- The gas which has the largest quantity in the atmosphere- nbsp-i- oxygen nbsp- nbsp- nbsp- nbsp-ii- nitrogen nbsp- nbsp- nbsp-iii- carbon dioxide nbsp- nbsp- nbsp- -iv- argon-b- The layer of the crust which makes the ocean floor-i- sial nbsp- nbsp- nbsp- nbsp- nbsp-ii- sima- nbsp- nbsp- nbsp- nbsp- nbsp-iii- biosphere nbsp- -iv- lithosphere- nbsp-c- The number of continents on earth-i- five nbsp- nbsp- -ii- seven nbsp- nbsp- nbsp- -iii- eight nbsp- nbsp- -iv- six- nbsp-

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Environment

Solve this: ...

Question

Solve this:

(a) The gas which has the largest quantity in the atmosphere:
(i) oxygen (ii) nitrogen (iii) carbon dioxide (iv) argon

(b) The layer of the crust which makes the ocean floor:
(i) sial (ii) sima. (iii) biosphere (iv) lithosphere.

(c) The number of continents on earth:
(i) five (ii) seven (iii) eight (iv) six

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\begin{matrix} C o l u m n A & C o l u m n B a . N o b l e g a s & (i) C a r b o n, h y d r o g e n, o x y g e n b . G r a p h i t e & (i i) A r g o n c . C a l c i u m & (i i i) L u b r i c a n t s d . G l u c o s e & (i v) M o n o a t o m i c \end{matrix}

Question 30
Choose the forms in which most plants absorb nitrogen

(i) Proteins
(ii) Nitrates and Nitrites
(iii) Urea
(iv) Atmospheric nitrogen

(a) (i) and (ii)
(b) (ii) and (iii)
(c) (iii) and (iv)
(d) (i) and (iv)

Tick the correct answers.

(a) The mountain range that separates Europe from Asia is

(i) the Andes

(ii) the Himalayas

(iii) the Urals

(b) The continent of North America is linked to South America by

(i) an Isthmus

(ii) a Strait

(iii) a Canal

(i) Nitrogen

(ii) Oxygen

(iii) Carbon dioxide

(d) The domain of the Earth consisting of solid rocks is

(i) the Atmosphere

(ii) the Hydrosphere

(iii) the Lithosphere

(e) Which is the largest continent?

(i) Africa

(ii) Asia

(iii) Australia

Question 30
Choose the forms in which most plants absorb nitrogen

(i) Proteins
(ii) Nitrates and Nitrites
(iii) Urea
(iv) Atmospheric nitrogen

(a) (i) and (ii)
(b) (ii) and (iii)
(c) (iii) and (iv)
(d) (i) and (iv)

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