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Page 1 G e n e r a l I n s t r u c t i o n s : T h i s q u e s t i o n p a p e r h a s 9 q u e s t i o n s . W r i t e t h e c o r r e c t s e r i a l n u m b e r o f t h e q u e s t i o n b e f o r e a t t e m p t i n g i t . P l e a s e d r a w a l i n e w i t h a s c a l e a f t e r e v e r a n s w e r . 1 . C h o o s e t h e c o r r e c t a n s w e r t o e a c h o f t h e f o l l o w i n g : 1 x 1 0 = 1 0 a . W h i c h o f t h e s e s u r r o u n d s t o m a t a l o p e n i n g ? i . c h l o r o p l a s t i i . c h l o r o p h y l l i i i . w a t e r i v . g u a r d c e l l s b . T h e c h e w i n g o f f o o d t o b r e a k i t i n t o s m a l l p i e c e s i s c a l l e d _ _ _ _ _ _ _ _ _ _ _ . i . m a s t i c a t i o n i i . p s e u d o p o d i a i i i . n u t r i t i o n i v . a b s o r p t i o n c . T h e v a l e n c y o f t h e u n d e r l i n e d r a d i c a l i n t h e c o m p o u n d N a N O 3 i s _ _ _ _ _ _ _ _ _ _ _ . i . 3 i i . 2 i i i . 1 i v . 4 d . W h i c h o f t h e s e h a s t h e l a r g e s t s i z e o f p a r t i c l e s ? i . s i l t i i . s a n d i i i . c l a y i v . l o a m e . T h e f o r m u l a f o r s o d i u m s u l p h a t e i s _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ . i . N a 2 S O 3 i i . N a 3 S O 3 i i i . N a 2 S O 4 i v . N a 4 S O 2 f . W h a t i s t h e n a m e o f a n a n i m a l o f t h e c a m e l f a m i l y t h a t g i v e s u s w o o l ? i . A n g o r a i i . A l p a c a i i i . Y a k i v . S h e e p g . 2 1 2 0 F i s t h e s a m e t e m p e r a t u r e a s _ _ _ _ _ _ _ _ _ _ _ _ _ . i . 1 0 0 0 C i i . 1 0 0 0 F i i i . 2 1 2 0 C i v . 0 0 C h . W h i c h o f t h e s e i s a s t r o n g a c i d ? i . s u l p h u r i c a c i d i i . c i t r i c a c i d i i i . a c e t i c a c i d i v . t a r t a r i c a c i d i . W h i c h o f t h e s e a b s o r b s a n d r e t a i n s t h e m a x i m u m w a t e r ? Page 2 G e n e r a l I n s t r u c t i o n s : T h i s q u e s t i o n p a p e r h a s 9 q u e s t i o n s . W r i t e t h e c o r r e c t s e r i a l n u m b e r o f t h e q u e s t i o n b e f o r e a t t e m p t i n g i t . P l e a s e d r a w a l i n e w i t h a s c a l e a f t e r e v e r a n s w e r . 1 . C h o o s e t h e c o r r e c t a n s w e r t o e a c h o f t h e f o l l o w i n g : 1 x 1 0 = 1 0 a . W h i c h o f t h e s e s u r r o u n d s t o m a t a l o p e n i n g ? i . c h l o r o p l a s t i i . c h l o r o p h y l l i i i . w a t e r i v . g u a r d c e l l s b . T h e c h e w i n g o f f o o d t o b r e a k i t i n t o s m a l l p i e c e s i s c a l l e d _ _ _ _ _ _ _ _ _ _ _ . i . m a s t i c a t i o n i i . p s e u d o p o d i a i i i . n u t r i t i o n i v . a b s o r p t i o n c . T h e v a l e n c y o f t h e u n d e r l i n e d r a d i c a l i n t h e c o m p o u n d N a N O 3 i s _ _ _ _ _ _ _ _ _ _ _ . i . 3 i i . 2 i i i . 1 i v . 4 d . W h i c h o f t h e s e h a s t h e l a r g e s t s i z e o f p a r t i c l e s ? i . s i l t i i . s a n d i i i . c l a y i v . l o a m e . T h e f o r m u l a f o r s o d i u m s u l p h a t e i s _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ . i . N a 2 S O 3 i i . N a 3 S O 3 i i i . N a 2 S O 4 i v . N a 4 S O 2 f . W h a t i s t h e n a m e o f a n a n i m a l o f t h e c a m e l f a m i l y t h a t g i v e s u s w o o l ? i . A n g o r a i i . A l p a c a i i i . Y a k i v . S h e e p g . 2 1 2 0 F i s t h e s a m e t e m p e r a t u r e a s _ _ _ _ _ _ _ _ _ _ _ _ _ . i . 1 0 0 0 C i i . 1 0 0 0 F i i i . 2 1 2 0 C i v . 0 0 C h . W h i c h o f t h e s e i s a s t r o n g a c i d ? i . s u l p h u r i c a c i d i i . c i t r i c a c i d i i i . a c e t i c a c i d i v . t a r t a r i c a c i d i . W h i c h o f t h e s e a b s o r b s a n d r e t a i n s t h e m a x i m u m w a t e r ? i . s a n d y s o i l i i . c l a y e y s o i l i i i . l o a m s o i l i v . s a n d y - l o a m s o i l j . C o n d u c t i o n t a k e s p l a c e i n _ _ _ _ _ _ _ _ _ . i . s o l i d s o n l y i i . l i q u i d s o n l y i i i . g a s e s o n l y i v . a l l o f t h e s e 2 . C o r r e c t t h e u n d e r l i n e d w o r d s a n d r e w r i t e t h e s t a t e m e n t s : 1 x 1 0 = 1 0 a . V a l e n c y o f c a l c i u m e l e m e n t i s z e r o . b . A n i m a l f i b r e s a r e m a d e u p o f c a r b o h y d r a t e . c . M u s h r o o m i s a p a r a s i t e . d . A t o m i c i t y o f h e l i u m i s t w o . e . S t r u c t u r e i n c e l l s t h a t c o n t a i n c h l o r o p h y l l a r e c a l l e d s t o m a t a . f . O x y g e n g e t s a b s o r b e d f r o m t h e a t m o s p h e r e d u r i n g p h o t o s y n t h e s i s . g . W a r m i n g o f e g g s t o a t e m p e r a t u r e s u i t a b l e f o r h a t c h i n g i s c a l l e d s p i n n i n g . h . C e l s i u s t e m p e r a t u r e s c a l e i s u s e d f o r s c i e n t i f i c w o r k . i . S e a a n d l a n d b r e e z e s a r e c a u s e d b y c u r r e n t s s e t u p i n a i r d u e t o r a d i a t i o n . j . C o t t o n f i b r e g i v e s a c h a r a c t e r i s t i c b u r n i n g h a i r s m e l l o n b e i n g b u r n t . 3 . G i v e o n e w o r d f o r e a c h o f t h e f o l l o w i n g : 1 x 4 = 4 a . N o n - p o r o u s l a y e r o f s o i l a b o v e w h i c h r a i n w a t e r g a t h e r s : b . P r o p e r t y o f s i l k t h a t m a k e s i t s o a t t r a c t i v e : c . D u r i n g d i g e s t i o n , p r o t e i n s a r e c h a n g e d i n t o : d . S m a l l p r o j e c t i o n s i n t h e s m a l l i n t e s t i n e t h a t h e l p i n a b s o r p t i o n o f d i g e s t e d f o o d : 4 . B a l a n c e t h e f o l l o w i n g c h e m i c a l e q u a t i o n : 1 x 4 = 4 a . N a + H 2 O - - - - - - ? N a O H + H 2 b . N 2 + H 2 - - - - - - ? N H 3 Page 3 G e n e r a l I n s t r u c t i o n s : T h i s q u e s t i o n p a p e r h a s 9 q u e s t i o n s . W r i t e t h e c o r r e c t s e r i a l n u m b e r o f t h e q u e s t i o n b e f o r e a t t e m p t i n g i t . P l e a s e d r a w a l i n e w i t h a s c a l e a f t e r e v e r a n s w e r . 1 . C h o o s e t h e c o r r e c t a n s w e r t o e a c h o f t h e f o l l o w i n g : 1 x 1 0 = 1 0 a . W h i c h o f t h e s e s u r r o u n d s t o m a t a l o p e n i n g ? i . c h l o r o p l a s t i i . c h l o r o p h y l l i i i . w a t e r i v . g u a r d c e l l s b . T h e c h e w i n g o f f o o d t o b r e a k i t i n t o s m a l l p i e c e s i s c a l l e d _ _ _ _ _ _ _ _ _ _ _ . i . m a s t i c a t i o n i i . p s e u d o p o d i a i i i . n u t r i t i o n i v . a b s o r p t i o n c . T h e v a l e n c y o f t h e u n d e r l i n e d r a d i c a l i n t h e c o m p o u n d N a N O 3 i s _ _ _ _ _ _ _ _ _ _ _ . i . 3 i i . 2 i i i . 1 i v . 4 d . W h i c h o f t h e s e h a s t h e l a r g e s t s i z e o f p a r t i c l e s ? i . s i l t i i . s a n d i i i . c l a y i v . l o a m e . T h e f o r m u l a f o r s o d i u m s u l p h a t e i s _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ . i . N a 2 S O 3 i i . N a 3 S O 3 i i i . N a 2 S O 4 i v . N a 4 S O 2 f . W h a t i s t h e n a m e o f a n a n i m a l o f t h e c a m e l f a m i l y t h a t g i v e s u s w o o l ? i . A n g o r a i i . A l p a c a i i i . Y a k i v . S h e e p g . 2 1 2 0 F i s t h e s a m e t e m p e r a t u r e a s _ _ _ _ _ _ _ _ _ _ _ _ _ . i . 1 0 0 0 C i i . 1 0 0 0 F i i i . 2 1 2 0 C i v . 0 0 C h . W h i c h o f t h e s e i s a s t r o n g a c i d ? i . s u l p h u r i c a c i d i i . c i t r i c a c i d i i i . a c e t i c a c i d i v . t a r t a r i c a c i d i . W h i c h o f t h e s e a b s o r b s a n d r e t a i n s t h e m a x i m u m w a t e r ? i . s a n d y s o i l i i . c l a y e y s o i l i i i . l o a m s o i l i v . s a n d y - l o a m s o i l j . C o n d u c t i o n t a k e s p l a c e i n _ _ _ _ _ _ _ _ _ . i . s o l i d s o n l y i i . l i q u i d s o n l y i i i . g a s e s o n l y i v . a l l o f t h e s e 2 . C o r r e c t t h e u n d e r l i n e d w o r d s a n d r e w r i t e t h e s t a t e m e n t s : 1 x 1 0 = 1 0 a . V a l e n c y o f c a l c i u m e l e m e n t i s z e r o . b . A n i m a l f i b r e s a r e m a d e u p o f c a r b o h y d r a t e . c . M u s h r o o m i s a p a r a s i t e . d . A t o m i c i t y o f h e l i u m i s t w o . e . S t r u c t u r e i n c e l l s t h a t c o n t a i n c h l o r o p h y l l a r e c a l l e d s t o m a t a . f . O x y g e n g e t s a b s o r b e d f r o m t h e a t m o s p h e r e d u r i n g p h o t o s y n t h e s i s . g . W a r m i n g o f e g g s t o a t e m p e r a t u r e s u i t a b l e f o r h a t c h i n g i s c a l l e d s p i n n i n g . h . C e l s i u s t e m p e r a t u r e s c a l e i s u s e d f o r s c i e n t i f i c w o r k . i . S e a a n d l a n d b r e e z e s a r e c a u s e d b y c u r r e n t s s e t u p i n a i r d u e t o r a d i a t i o n . j . C o t t o n f i b r e g i v e s a c h a r a c t e r i s t i c b u r n i n g h a i r s m e l l o n b e i n g b u r n t . 3 . G i v e o n e w o r d f o r e a c h o f t h e f o l l o w i n g : 1 x 4 = 4 a . N o n - p o r o u s l a y e r o f s o i l a b o v e w h i c h r a i n w a t e r g a t h e r s : b . P r o p e r t y o f s i l k t h a t m a k e s i t s o a t t r a c t i v e : c . D u r i n g d i g e s t i o n , p r o t e i n s a r e c h a n g e d i n t o : d . S m a l l p r o j e c t i o n s i n t h e s m a l l i n t e s t i n e t h a t h e l p i n a b s o r p t i o n o f d i g e s t e d f o o d : 4 . B a l a n c e t h e f o l l o w i n g c h e m i c a l e q u a t i o n : 1 x 4 = 4 a . N a + H 2 O - - - - - - ? N a O H + H 2 b . N 2 + H 2 - - - - - - ? N H 3 c . N a N O 3 - - - - - - ? N a N O 2 + O 2 d . C H 4 + O 2 - - - - - - ? C O 2 + H 2 O 5 . G i v e r e a s o n s f o r t h e f o l l o w i n g s t a t e m e n t s i n 3 0 - 4 0 w o r d s : 2 x 7 = 1 4 a . F a r m e r s d o n o t a d d f e r t i l i z e r s t o s o i l i n w h i c h l e g u m i n o u s p l a n t s a r e g r o w n . b . T o p s o i l h a s m u c h m o r e h u m u s t h a n s u b s o i l . c . M a g n e s i u m h y d r o x i d e i s u s e d a s a n a n t a c i d . d . E x p a n s i o n j o i n t a n d p i p e l o o p s a r e m a d e i n p i p i n g s y s t e m s . e . F i r e m e n u s u a l l y c r a w l w h i l e e n t e r i n g a b u i l d i n g w h e r e f i r e h a s b r o k e n o u t . f . M o s t e l e m e n t s a r e n o t f o u n d i n t h e f r e e s t a t e i n n a t u r e . g . P r o p e r t i e s o f d i f f e r e n t c o m p o u n d s a r e s o d i f f e r e n t f r o m e a c h o t h e r . 6 . A n s w e r t h e f o l l o w i n g q u e s t i o n i n 4 0 - 5 0 w o r d s : 2 x 3 = 6 a . H o w c a n y o u t e s t f o r t h e p r e s e n c e o f s t a r c h i n a l e a f ? b . H o w a r e a u t o t r o p h s d i f f e r e n t f r o m h e t e r o t r o p h s ? c . E x p l a i n p e r i s t a l s i s w i t h t h e h e l p o f a d i a g r a m . 7 . A n s w e r t h e f o l l o w i n g q u e s t i o n s i n 5 0 - 6 0 w o r d s : 2 x 8 = 1 6 a . W h a t i s t h e f u n c t i o n o f d u l l b l a c k c o l o u r a t t h e b a c k o f r e f r i g e r a t o r s ? b . W h a t c o n d i t i o n s a r e n e c e s s a r y f o r t r a n s f e r o f h e a t f r o m o n e b o d y t o a n o t h e r b y c o n d u c t i o n ? c . C o n v e r t 9 5 0 F t o 0 C . d . D e f i n e v a l e n c y i n t e r m s o f h y d r o g e n . e . W h a t h a p p e n s w h e n h y d r o c h l o r i c a c i d r e a c t s w i t h M a g n e s i u m ? A l s o w r i t e t h e c h e m i c a l r e a c t i o n . Page 4 G e n e r a l I n s t r u c t i o n s : T h i s q u e s t i o n p a p e r h a s 9 q u e s t i o n s . W r i t e t h e c o r r e c t s e r i a l n u m b e r o f t h e q u e s t i o n b e f o r e a t t e m p t i n g i t . P l e a s e d r a w a l i n e w i t h a s c a l e a f t e r e v e r a n s w e r . 1 . C h o o s e t h e c o r r e c t a n s w e r t o e a c h o f t h e f o l l o w i n g : 1 x 1 0 = 1 0 a . W h i c h o f t h e s e s u r r o u n d s t o m a t a l o p e n i n g ? i . c h l o r o p l a s t i i . c h l o r o p h y l l i i i . w a t e r i v . g u a r d c e l l s b . T h e c h e w i n g o f f o o d t o b r e a k i t i n t o s m a l l p i e c e s i s c a l l e d _ _ _ _ _ _ _ _ _ _ _ . i . m a s t i c a t i o n i i . p s e u d o p o d i a i i i . n u t r i t i o n i v . a b s o r p t i o n c . T h e v a l e n c y o f t h e u n d e r l i n e d r a d i c a l i n t h e c o m p o u n d N a N O 3 i s _ _ _ _ _ _ _ _ _ _ _ . i . 3 i i . 2 i i i . 1 i v . 4 d . W h i c h o f t h e s e h a s t h e l a r g e s t s i z e o f p a r t i c l e s ? i . s i l t i i . s a n d i i i . c l a y i v . l o a m e . T h e f o r m u l a f o r s o d i u m s u l p h a t e i s _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ . i . N a 2 S O 3 i i . N a 3 S O 3 i i i . N a 2 S O 4 i v . N a 4 S O 2 f . W h a t i s t h e n a m e o f a n a n i m a l o f t h e c a m e l f a m i l y t h a t g i v e s u s w o o l ? i . A n g o r a i i . A l p a c a i i i . Y a k i v . S h e e p g . 2 1 2 0 F i s t h e s a m e t e m p e r a t u r e a s _ _ _ _ _ _ _ _ _ _ _ _ _ . i . 1 0 0 0 C i i . 1 0 0 0 F i i i . 2 1 2 0 C i v . 0 0 C h . W h i c h o f t h e s e i s a s t r o n g a c i d ? i . s u l p h u r i c a c i d i i . c i t r i c a c i d i i i . a c e t i c a c i d i v . t a r t a r i c a c i d i . W h i c h o f t h e s e a b s o r b s a n d r e t a i n s t h e m a x i m u m w a t e r ? i . s a n d y s o i l i i . c l a y e y s o i l i i i . l o a m s o i l i v . s a n d y - l o a m s o i l j . C o n d u c t i o n t a k e s p l a c e i n _ _ _ _ _ _ _ _ _ . i . s o l i d s o n l y i i . l i q u i d s o n l y i i i . g a s e s o n l y i v . a l l o f t h e s e 2 . C o r r e c t t h e u n d e r l i n e d w o r d s a n d r e w r i t e t h e s t a t e m e n t s : 1 x 1 0 = 1 0 a . V a l e n c y o f c a l c i u m e l e m e n t i s z e r o . b . A n i m a l f i b r e s a r e m a d e u p o f c a r b o h y d r a t e . c . M u s h r o o m i s a p a r a s i t e . d . A t o m i c i t y o f h e l i u m i s t w o . e . S t r u c t u r e i n c e l l s t h a t c o n t a i n c h l o r o p h y l l a r e c a l l e d s t o m a t a . f . O x y g e n g e t s a b s o r b e d f r o m t h e a t m o s p h e r e d u r i n g p h o t o s y n t h e s i s . g . W a r m i n g o f e g g s t o a t e m p e r a t u r e s u i t a b l e f o r h a t c h i n g i s c a l l e d s p i n n i n g . h . C e l s i u s t e m p e r a t u r e s c a l e i s u s e d f o r s c i e n t i f i c w o r k . i . S e a a n d l a n d b r e e z e s a r e c a u s e d b y c u r r e n t s s e t u p i n a i r d u e t o r a d i a t i o n . j . C o t t o n f i b r e g i v e s a c h a r a c t e r i s t i c b u r n i n g h a i r s m e l l o n b e i n g b u r n t . 3 . G i v e o n e w o r d f o r e a c h o f t h e f o l l o w i n g : 1 x 4 = 4 a . N o n - p o r o u s l a y e r o f s o i l a b o v e w h i c h r a i n w a t e r g a t h e r s : b . P r o p e r t y o f s i l k t h a t m a k e s i t s o a t t r a c t i v e : c . D u r i n g d i g e s t i o n , p r o t e i n s a r e c h a n g e d i n t o : d . S m a l l p r o j e c t i o n s i n t h e s m a l l i n t e s t i n e t h a t h e l p i n a b s o r p t i o n o f d i g e s t e d f o o d : 4 . B a l a n c e t h e f o l l o w i n g c h e m i c a l e q u a t i o n : 1 x 4 = 4 a . N a + H 2 O - - - - - - ? N a O H + H 2 b . N 2 + H 2 - - - - - - ? N H 3 c . N a N O 3 - - - - - - ? N a N O 2 + O 2 d . C H 4 + O 2 - - - - - - ? C O 2 + H 2 O 5 . G i v e r e a s o n s f o r t h e f o l l o w i n g s t a t e m e n t s i n 3 0 - 4 0 w o r d s : 2 x 7 = 1 4 a . F a r m e r s d o n o t a d d f e r t i l i z e r s t o s o i l i n w h i c h l e g u m i n o u s p l a n t s a r e g r o w n . b . T o p s o i l h a s m u c h m o r e h u m u s t h a n s u b s o i l . c . M a g n e s i u m h y d r o x i d e i s u s e d a s a n a n t a c i d . d . E x p a n s i o n j o i n t a n d p i p e l o o p s a r e m a d e i n p i p i n g s y s t e m s . e . F i r e m e n u s u a l l y c r a w l w h i l e e n t e r i n g a b u i l d i n g w h e r e f i r e h a s b r o k e n o u t . f . M o s t e l e m e n t s a r e n o t f o u n d i n t h e f r e e s t a t e i n n a t u r e . g . P r o p e r t i e s o f d i f f e r e n t c o m p o u n d s a r e s o d i f f e r e n t f r o m e a c h o t h e r . 6 . A n s w e r t h e f o l l o w i n g q u e s t i o n i n 4 0 - 5 0 w o r d s : 2 x 3 = 6 a . H o w c a n y o u t e s t f o r t h e p r e s e n c e o f s t a r c h i n a l e a f ? b . H o w a r e a u t o t r o p h s d i f f e r e n t f r o m h e t e r o t r o p h s ? c . E x p l a i n p e r i s t a l s i s w i t h t h e h e l p o f a d i a g r a m . 7 . A n s w e r t h e f o l l o w i n g q u e s t i o n s i n 5 0 - 6 0 w o r d s : 2 x 8 = 1 6 a . W h a t i s t h e f u n c t i o n o f d u l l b l a c k c o l o u r a t t h e b a c k o f r e f r i g e r a t o r s ? b . W h a t c o n d i t i o n s a r e n e c e s s a r y f o r t r a n s f e r o f h e a t f r o m o n e b o d y t o a n o t h e r b y c o n d u c t i o n ? c . C o n v e r t 9 5 0 F t o 0 C . d . D e f i n e v a l e n c y i n t e r m s o f h y d r o g e n . e . W h a t h a p p e n s w h e n h y d r o c h l o r i c a c i d r e a c t s w i t h M a g n e s i u m ? A l s o w r i t e t h e c h e m i c a l r e a c t i o n . f . H o w d o e s e x c h a n g e o f g a s e s t a k e p l a c e i n l e a v e s ? E x p l a i n w i t h t h e h e l p o f a d i a g r a m . g . W h a t i s a n a c i d b a s e i n d i c a t o r ? G i v e o n e e x a m p l e . h . W h a t i s t h e f u n c t i o n o f a c i d a n d d i g e s t i v e j u i c e s i n t h e s t o m a c h ? 8 . D r a w n e a t a n d w e l l l a b e l l e d d i a g r a m s o f t h e f o l l o w i n g : 3 x 2 = 6 a . H u m a n d i g e s t i v e s y s t e m . b . S o i l p r o f i l e . 9 . A n s w e r t h e f o l l o w i n g q u e s t i o n s i n d e t a i l a n d d r a w l a b e l l e d d i a g r a m s w h e r e v e r r e q u i r e d : 4 x 5 = 2 0 a . E x p l a i n w i t h t h e h e l p o f a d i a g r a m t h e w o r k i n g o f a n a u t o m a t i c f i r e a l a r m . b . E x p l a i n t h e i n g e s t i o n o f f o o d i n h y d r a . c . R a m s a r a n w a s w o r k i n g i n a s e r i c u l t u r e i n d u s t r y f o r m a n y y e a r s . O n e d a y h e f e l l s i c k a n d d o c t o r d i a g n o s e d h i m w i t h a s k i n d i s e a s e . R a m s a r a n ’ s f r i e n d , M o h a n l a l w h o w a s a n a n i m a l r i g h t a c t i v i s t w a s a l w a y s o p p o s e d t o R a m s a r a n w o r k i n g i n t h e s e r i c u l t u r e i n d u s t r y . H e a d v i s e d h i s f r i e n d t o q u i t h i s j o b . H e h e l p e d R a m s a r n f i n a n c i a l l y a n d t o o k c a r e o f h i m u n t i l h e g o t w e l l . i . W h i c h d i s e a s e i s R a m s a r a n l i k e l y t o s u f f e r f r o m ? i i . W h y i s i t c o m m o n i n w o r k e r s w o r k i n g i n s e r i c u l t u r e i n d u s t r y ? i i i . W h y a r e a n i m a l r i g h t a c t i v i s t s o p p o s e d t o t h e p r o c e s s o f g e t t i n g s i l k f r o m c o c o o n ? i v . W h a t v a l u e s a r e d i s p l a y e d b y M o h a n l a l ? d . D e s c r i b e a n e x p e r i m e n t t o s h o w t h e p r o c e s s o f c o n d u c t i o n . e . L i s t f o u r p r o p e r t i e s o f b a s e s . G i v e t w o u s e s o f C a l c i u m h y d r o x i d e .Read More
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FAQs on Class 7 Science: CBSE Past Year Paper - 10 - Science Class 7
| 1. What is the importance of soil in agriculture? |  |
Ans. Soil is of great importance in agriculture as it provides essential nutrients, water, and anchorage to plants. It also serves as a medium for the growth of roots and acts as a reservoir for water and nutrients. The soil's structure and composition directly influence the growth and productivity of crops.
| 2. How does soil erosion affect agriculture? | |
Ans. Soil erosion can have detrimental effects on agriculture. It leads to the loss of topsoil, which is rich in nutrients necessary for plant growth. As a result, the fertility of the land decreases, leading to reduced crop yield. Soil erosion also causes waterlogging and flooding in some areas, further impacting agricultural productivity.
| 3. What are the different types of irrigation methods used in agriculture? | |
Ans. Various irrigation methods are used in agriculture, including drip irrigation, sprinkler irrigation, flood irrigation, and sub-irrigation. Drip irrigation involves the slow and precise application of water directly to the plant's roots. Sprinkler irrigation uses sprinklers to distribute water over the crops. Flood irrigation involves flooding the field with water, while sub-irrigation involves supplying water below the soil surface.
| 4. How do fertilizers enhance crop production? | |
Ans. Fertilizers are substances that provide essential nutrients to plants, promoting their growth and improving crop production. They replenish the soil with nutrients like nitrogen, phosphorus, and potassium, which are often depleted due to continuous cultivation. Fertilizers ensure that plants receive an adequate supply of nutrients, resulting in healthier and more productive crops.
| 5. What are the advantages of organic farming? | |
Ans. Organic farming has several advantages. It promotes the use of natural fertilizers and pesticides, reducing the harmful impact of chemicals on the environment and human health. It also helps in maintaining soil fertility, conserving water, and preserving biodiversity. Organic farming practices prioritize sustainable agriculture and promote the production of healthy and nutritious food.
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