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Page 1 1 / 1 0 C B S E C l a s s 9 - S c i e n c e G e n e r a l I n s t r u c t i o n s : i . T h e q u e s t i o n p a p e r c o m p r i s e s o f t h r e e S e c t i o n s A , B a n d C . Y o u a r e t o a t t e m p t a l l t h e s e c t i o n s . i i . A l l q u e s t i o n s a r e c o m p u l s o r y . i i i . T h e r e i s n o c h o i c e i n a n y o f t h e q u e s t i o n s . i v . A l l q u e s t i o n s o f S e c t i o n A , S e c t i o n B a r e t o b e a t t e m p t e d s e p a r a t e l y . v . Q u e s t i o n n u m b e r s 1 t o 2 i n S e c t i o n A a r e o n e m a r k q u e s t i o n s . T h e s e a r e t o b e a n s w e r e d i n o n e w o r d o r i n o n e s e n t e n c e . v i . Q u e s t i o n n u m b e r s 3 a n d 5 i n S e c t i o n A a r e t w o m a r k s q u e s t i o n s . T h e s e a r e t o b e a n s w e r e d i n a b o u t 3 0 w o r d s e a c h . v i i . Q u e s t i o n n u m b e r s 6 t o 1 5 i n S e c t i o n A a r e t h r e e m a r k s q u e s t i o n s . T h e s e a r e t o b e a n s w e r e d i n a b o u t 5 0 w o r d s e a c h . v i i i . Q u e s t i o n n u m b e r s 1 6 t o 2 1 i n S e c t i o n A a r e f v e m a r k s q u e s t i o n s . T h e s e a r e t o b e a n s w e r e d i n a b o u t 7 0 w o r d s e a c h . i x . Q u e s t i o n n u m b e r s 2 2 t o 2 7 i n S e c t i o n B a r e t w o m a r k s q u e s t i o n s b a s e d o n p r a c t i c a l s k i l l s . T h e s e a r e t o b e a n s w e r s i n a b o u t 3 0 w o r d s e a c h . S e c t i o n ' A ' 1 . A p e r s o n t r a v e l s 6 K m . i n a c i r c u l a r p a t h a n d r e a c h e s b a c k o n t h e s t a r t i n g p o i n t . C a l c u l a t e t h e d i s p l a c e m e n t . A n s . D i s p l a c e m e n t i s z e r o b e c a u s e s t a r t i n g p o i n t o f t h e j o u r n e y a n d e n d i n g p o i n t o f t h e j o u r n e y i s s a m e . 2 . W r i t e n a m e s o f s o l u t i o n s u s e d t o s t a i n p l a n t c e l l a n d a n i m a l c e l l w h i t e m a k i n g a s l i d e . A n s . S a f r a n i n e i s u s e d t o s t a i n p l a n t c e l l . M e t h y l e n e b l u e i s u s e d t o s t a i n a n i m a l c e l l . Page 2 1 / 1 0 C B S E C l a s s 9 - S c i e n c e G e n e r a l I n s t r u c t i o n s : i . T h e q u e s t i o n p a p e r c o m p r i s e s o f t h r e e S e c t i o n s A , B a n d C . Y o u a r e t o a t t e m p t a l l t h e s e c t i o n s . i i . A l l q u e s t i o n s a r e c o m p u l s o r y . i i i . T h e r e i s n o c h o i c e i n a n y o f t h e q u e s t i o n s . i v . A l l q u e s t i o n s o f S e c t i o n A , S e c t i o n B a r e t o b e a t t e m p t e d s e p a r a t e l y . v . Q u e s t i o n n u m b e r s 1 t o 2 i n S e c t i o n A a r e o n e m a r k q u e s t i o n s . T h e s e a r e t o b e a n s w e r e d i n o n e w o r d o r i n o n e s e n t e n c e . v i . Q u e s t i o n n u m b e r s 3 a n d 5 i n S e c t i o n A a r e t w o m a r k s q u e s t i o n s . T h e s e a r e t o b e a n s w e r e d i n a b o u t 3 0 w o r d s e a c h . v i i . Q u e s t i o n n u m b e r s 6 t o 1 5 i n S e c t i o n A a r e t h r e e m a r k s q u e s t i o n s . T h e s e a r e t o b e a n s w e r e d i n a b o u t 5 0 w o r d s e a c h . v i i i . Q u e s t i o n n u m b e r s 1 6 t o 2 1 i n S e c t i o n A a r e f v e m a r k s q u e s t i o n s . T h e s e a r e t o b e a n s w e r e d i n a b o u t 7 0 w o r d s e a c h . i x . Q u e s t i o n n u m b e r s 2 2 t o 2 7 i n S e c t i o n B a r e t w o m a r k s q u e s t i o n s b a s e d o n p r a c t i c a l s k i l l s . T h e s e a r e t o b e a n s w e r s i n a b o u t 3 0 w o r d s e a c h . S e c t i o n ' A ' 1 . A p e r s o n t r a v e l s 6 K m . i n a c i r c u l a r p a t h a n d r e a c h e s b a c k o n t h e s t a r t i n g p o i n t . C a l c u l a t e t h e d i s p l a c e m e n t . A n s . D i s p l a c e m e n t i s z e r o b e c a u s e s t a r t i n g p o i n t o f t h e j o u r n e y a n d e n d i n g p o i n t o f t h e j o u r n e y i s s a m e . 2 . W r i t e n a m e s o f s o l u t i o n s u s e d t o s t a i n p l a n t c e l l a n d a n i m a l c e l l w h i t e m a k i n g a s l i d e . A n s . S a f r a n i n e i s u s e d t o s t a i n p l a n t c e l l . M e t h y l e n e b l u e i s u s e d t o s t a i n a n i m a l c e l l . 2 / 1 0 3 . R e c o g n i s e t h e p h y l u m o f a n i m a l s o n t h e b a s i s o f c h a r a c t e r i s t i c s g i v e n . b e l o w . A l s o w r i t e o n e e x a m p l e s o f e a c h . A n s . a . C o e l o m i s f i l l e d w i t h b l o o d a n d l e g s a n d j o i n t e d . b . T h e s e a n i m a l a r e f r e e l i v i n g o r p a r a s i t e a n d t h e s e a r e c a l l e d ? a t w o r m s . c . P h y l u m - A r t h r o p o d a - e g - H o u s e ? y , b u t t e r ? y , s p i d e r e t c . T h e a n i m a l s h a v e c o e l o m f i l l e d w i t h b l o o d a n d j o i n t e d l e g s . d . P l a t y h e l m i n t h e s i s t h e p h y l u m o f ? a t w o r m s . T h e y a r e f r e e l i v i n g o r p a r a s i t e . e x a m p l e : p l a n a r i a , l i v e r ? u k e . 4 . H o w d o e s e n d o c y t o s i s h e l p i s s i n g l e c e l l e d o r g a n i s m l i k e a m a e b a ? A n s . A m o e b a i s a u n i c e l l u l a r o r g a n i s m . A l l t h e p r o c e s s e s o f l i v i n g b e i n g a r e p e r f o r m e d i n t h i s o r g a n i s m . P l a s m a m e m b r a n e i s ? e x i b l e . S o a m o e b a c a n t a k e i t s f o o d f r o m s u r r o u n d i n g s . T h i s p r o c e s s i s c a l l e d e n d o c y t o s i s . 5 . W r i t e o n e w o r d f o r t h e f o l l o w i n g : - a . A g r o u p o f c e l l s h a v i n g s t r u c t u r e i n w h i c h c e l l s a r e a r r n a g e d i n a s p e c i a l o r d e r t o p e r f o r m a w o r k . b . T h e p r o c e s s o f t a k i n g p e r m a n e n t s h a p e a n d s i z e t o p e r f o r m a s p e c i a l f u n c t i o n . c . A n i m a l t i s s u e w h i c h a t t a c h e s m u s c l e s t o b o n e . d . K i n d l y s h a p e d c e l l s s u r r o u n d i n g t h e s t o m a t a . A n s . ( a ) T i s s u e ( b ) D i f f e r e n t i a t i o n ( c ) T e n d o r s ( d ) G u a r d c e l l s . 6 . ( a ) E x p l a i n t h e l a w o f c o n s e r v a t i o n o f e n e r g y . ( b ) G i v e o n e e x a m p l e o f e a c h e n e r g y t r a n s f o r m a t i o n : - ( i ) H e a t e n e r g y t o m e c h a n i c a l e n e r g y . ( i i ) M e c h a n i c a l e n e r g y t o e l e c t r i c e n e r g y . ( c ) A p e r s o n i s s t a n d i n g f r o m 2 0 m i n u t e s w i t h h e a v y w e i g h t o n h i s h e a d . D o e s h e d o Page 3 1 / 1 0 C B S E C l a s s 9 - S c i e n c e G e n e r a l I n s t r u c t i o n s : i . T h e q u e s t i o n p a p e r c o m p r i s e s o f t h r e e S e c t i o n s A , B a n d C . Y o u a r e t o a t t e m p t a l l t h e s e c t i o n s . i i . A l l q u e s t i o n s a r e c o m p u l s o r y . i i i . T h e r e i s n o c h o i c e i n a n y o f t h e q u e s t i o n s . i v . A l l q u e s t i o n s o f S e c t i o n A , S e c t i o n B a r e t o b e a t t e m p t e d s e p a r a t e l y . v . Q u e s t i o n n u m b e r s 1 t o 2 i n S e c t i o n A a r e o n e m a r k q u e s t i o n s . T h e s e a r e t o b e a n s w e r e d i n o n e w o r d o r i n o n e s e n t e n c e . v i . Q u e s t i o n n u m b e r s 3 a n d 5 i n S e c t i o n A a r e t w o m a r k s q u e s t i o n s . T h e s e a r e t o b e a n s w e r e d i n a b o u t 3 0 w o r d s e a c h . v i i . Q u e s t i o n n u m b e r s 6 t o 1 5 i n S e c t i o n A a r e t h r e e m a r k s q u e s t i o n s . T h e s e a r e t o b e a n s w e r e d i n a b o u t 5 0 w o r d s e a c h . v i i i . Q u e s t i o n n u m b e r s 1 6 t o 2 1 i n S e c t i o n A a r e f v e m a r k s q u e s t i o n s . T h e s e a r e t o b e a n s w e r e d i n a b o u t 7 0 w o r d s e a c h . i x . Q u e s t i o n n u m b e r s 2 2 t o 2 7 i n S e c t i o n B a r e t w o m a r k s q u e s t i o n s b a s e d o n p r a c t i c a l s k i l l s . T h e s e a r e t o b e a n s w e r s i n a b o u t 3 0 w o r d s e a c h . S e c t i o n ' A ' 1 . A p e r s o n t r a v e l s 6 K m . i n a c i r c u l a r p a t h a n d r e a c h e s b a c k o n t h e s t a r t i n g p o i n t . C a l c u l a t e t h e d i s p l a c e m e n t . A n s . D i s p l a c e m e n t i s z e r o b e c a u s e s t a r t i n g p o i n t o f t h e j o u r n e y a n d e n d i n g p o i n t o f t h e j o u r n e y i s s a m e . 2 . W r i t e n a m e s o f s o l u t i o n s u s e d t o s t a i n p l a n t c e l l a n d a n i m a l c e l l w h i t e m a k i n g a s l i d e . A n s . S a f r a n i n e i s u s e d t o s t a i n p l a n t c e l l . M e t h y l e n e b l u e i s u s e d t o s t a i n a n i m a l c e l l . 2 / 1 0 3 . R e c o g n i s e t h e p h y l u m o f a n i m a l s o n t h e b a s i s o f c h a r a c t e r i s t i c s g i v e n . b e l o w . A l s o w r i t e o n e e x a m p l e s o f e a c h . A n s . a . C o e l o m i s f i l l e d w i t h b l o o d a n d l e g s a n d j o i n t e d . b . T h e s e a n i m a l a r e f r e e l i v i n g o r p a r a s i t e a n d t h e s e a r e c a l l e d ? a t w o r m s . c . P h y l u m - A r t h r o p o d a - e g - H o u s e ? y , b u t t e r ? y , s p i d e r e t c . T h e a n i m a l s h a v e c o e l o m f i l l e d w i t h b l o o d a n d j o i n t e d l e g s . d . P l a t y h e l m i n t h e s i s t h e p h y l u m o f ? a t w o r m s . T h e y a r e f r e e l i v i n g o r p a r a s i t e . e x a m p l e : p l a n a r i a , l i v e r ? u k e . 4 . H o w d o e s e n d o c y t o s i s h e l p i s s i n g l e c e l l e d o r g a n i s m l i k e a m a e b a ? A n s . A m o e b a i s a u n i c e l l u l a r o r g a n i s m . A l l t h e p r o c e s s e s o f l i v i n g b e i n g a r e p e r f o r m e d i n t h i s o r g a n i s m . P l a s m a m e m b r a n e i s ? e x i b l e . S o a m o e b a c a n t a k e i t s f o o d f r o m s u r r o u n d i n g s . T h i s p r o c e s s i s c a l l e d e n d o c y t o s i s . 5 . W r i t e o n e w o r d f o r t h e f o l l o w i n g : - a . A g r o u p o f c e l l s h a v i n g s t r u c t u r e i n w h i c h c e l l s a r e a r r n a g e d i n a s p e c i a l o r d e r t o p e r f o r m a w o r k . b . T h e p r o c e s s o f t a k i n g p e r m a n e n t s h a p e a n d s i z e t o p e r f o r m a s p e c i a l f u n c t i o n . c . A n i m a l t i s s u e w h i c h a t t a c h e s m u s c l e s t o b o n e . d . K i n d l y s h a p e d c e l l s s u r r o u n d i n g t h e s t o m a t a . A n s . ( a ) T i s s u e ( b ) D i f f e r e n t i a t i o n ( c ) T e n d o r s ( d ) G u a r d c e l l s . 6 . ( a ) E x p l a i n t h e l a w o f c o n s e r v a t i o n o f e n e r g y . ( b ) G i v e o n e e x a m p l e o f e a c h e n e r g y t r a n s f o r m a t i o n : - ( i ) H e a t e n e r g y t o m e c h a n i c a l e n e r g y . ( i i ) M e c h a n i c a l e n e r g y t o e l e c t r i c e n e r g y . ( c ) A p e r s o n i s s t a n d i n g f r o m 2 0 m i n u t e s w i t h h e a v y w e i g h t o n h i s h e a d . D o e s h e d o 3 / 1 0 a n y w o r k o r n o t ? e x p l a i n . A n s . ( a ) A c c o r d i n g t o c o n s e r v a t i o n o f e n e r g y , " E n e r g y c a n n e i t h e r b e c r e a t e d n o r d e s t r o y e d " . I t c a n b e t r a n s f o r m e d f r o m o n e f o r m t o i t ' s a n o t h e r f o r m . T o t a l e n e r g y b e f o r e a n d a f t e r t r a n s f o r m a t i o n r e m a i n s t h e s a m e . ( b ) ( i ) H e a t i s f o r m e d b y b u r n i n g o f f u e l i n a n e n g i n e . T h i s h e a t e n e r g y i s c o n v e r t e d i n t o m e c h a n i c a l e n e r g y . ( i i ) I n a n e l e c t r i c g e n e r a t o r . M e c h a n i c a l e n e r g y i s c o n v e r t e d i n t o e l e c t r i c a l e n e r g y . 7 . ( a ) A n e l e c t r i c h e a t e r o f 2 0 0 0 W a l t i s w o r k i n g f o r 5 h o u r s . H o w m u c h e n e r g y i t c o n s u m e ? ( b ) C o n v e r t c o m m e r c i a l u n i t o f e n e r g y i n t o S . I . u n i t o f e n e r g y . A n s . ( a ) P o w e r o f e l e c t r i c h e a t e r ( P ) = 2 0 0 0 w T i m e o f u s e ( T ) = 5 H r C o n s u m e d e n e r g y ( E ) = P × t = 2 0 0 0 × 5 w h = k w × 5 h = 1 0 K w h . ( b ) C o m m e r c i a l u n i t o f e n e r g y = 1 K w h S . I . u n i t o f e n e r g y = 1 J o u l e 1 K w h = 1 0 0 0 × 6 0 × 6 0 w s = 3 . 6 × 1 0 6 J o u l e s . 8 . ( a ) D r a w a d i a g r a m s h o w i n g R u t h e r f o r d ' s r a y s s c a t t e r i n g e x p e r i m e n t s " . ( b ) W h y R u t h e r f o r d u s e d g o l d f o i l i n a b o v e s a i d e x p e r i m e n t ? A n s . ( a ) ( b ) R u t h e r f o r d c h o o s e g o l d f o i l b e c a u s e t h e y w a n t a v e r y t h i n l a y e r . T h i c k n e s s o f g o l d f o i l i s e q u a l t o t h e t h i c k n e s s o f 1 0 0 0 a t o m p u t t o g e t h e r . 9 . T h e n u m b e r o f n e u t r o n s a n d p r o t o n s i n t h e n u c l e i o f t w o a t o m s A a n d B i s a s f o l l o w : A B P r o t o n 8 8 Page 4 1 / 1 0 C B S E C l a s s 9 - S c i e n c e G e n e r a l I n s t r u c t i o n s : i . T h e q u e s t i o n p a p e r c o m p r i s e s o f t h r e e S e c t i o n s A , B a n d C . Y o u a r e t o a t t e m p t a l l t h e s e c t i o n s . i i . A l l q u e s t i o n s a r e c o m p u l s o r y . i i i . T h e r e i s n o c h o i c e i n a n y o f t h e q u e s t i o n s . i v . A l l q u e s t i o n s o f S e c t i o n A , S e c t i o n B a r e t o b e a t t e m p t e d s e p a r a t e l y . v . Q u e s t i o n n u m b e r s 1 t o 2 i n S e c t i o n A a r e o n e m a r k q u e s t i o n s . T h e s e a r e t o b e a n s w e r e d i n o n e w o r d o r i n o n e s e n t e n c e . v i . Q u e s t i o n n u m b e r s 3 a n d 5 i n S e c t i o n A a r e t w o m a r k s q u e s t i o n s . T h e s e a r e t o b e a n s w e r e d i n a b o u t 3 0 w o r d s e a c h . v i i . Q u e s t i o n n u m b e r s 6 t o 1 5 i n S e c t i o n A a r e t h r e e m a r k s q u e s t i o n s . T h e s e a r e t o b e a n s w e r e d i n a b o u t 5 0 w o r d s e a c h . v i i i . Q u e s t i o n n u m b e r s 1 6 t o 2 1 i n S e c t i o n A a r e f v e m a r k s q u e s t i o n s . T h e s e a r e t o b e a n s w e r e d i n a b o u t 7 0 w o r d s e a c h . i x . Q u e s t i o n n u m b e r s 2 2 t o 2 7 i n S e c t i o n B a r e t w o m a r k s q u e s t i o n s b a s e d o n p r a c t i c a l s k i l l s . T h e s e a r e t o b e a n s w e r s i n a b o u t 3 0 w o r d s e a c h . S e c t i o n ' A ' 1 . A p e r s o n t r a v e l s 6 K m . i n a c i r c u l a r p a t h a n d r e a c h e s b a c k o n t h e s t a r t i n g p o i n t . C a l c u l a t e t h e d i s p l a c e m e n t . A n s . D i s p l a c e m e n t i s z e r o b e c a u s e s t a r t i n g p o i n t o f t h e j o u r n e y a n d e n d i n g p o i n t o f t h e j o u r n e y i s s a m e . 2 . W r i t e n a m e s o f s o l u t i o n s u s e d t o s t a i n p l a n t c e l l a n d a n i m a l c e l l w h i t e m a k i n g a s l i d e . A n s . S a f r a n i n e i s u s e d t o s t a i n p l a n t c e l l . M e t h y l e n e b l u e i s u s e d t o s t a i n a n i m a l c e l l . 2 / 1 0 3 . R e c o g n i s e t h e p h y l u m o f a n i m a l s o n t h e b a s i s o f c h a r a c t e r i s t i c s g i v e n . b e l o w . A l s o w r i t e o n e e x a m p l e s o f e a c h . A n s . a . C o e l o m i s f i l l e d w i t h b l o o d a n d l e g s a n d j o i n t e d . b . T h e s e a n i m a l a r e f r e e l i v i n g o r p a r a s i t e a n d t h e s e a r e c a l l e d ? a t w o r m s . c . P h y l u m - A r t h r o p o d a - e g - H o u s e ? y , b u t t e r ? y , s p i d e r e t c . T h e a n i m a l s h a v e c o e l o m f i l l e d w i t h b l o o d a n d j o i n t e d l e g s . d . P l a t y h e l m i n t h e s i s t h e p h y l u m o f ? a t w o r m s . T h e y a r e f r e e l i v i n g o r p a r a s i t e . e x a m p l e : p l a n a r i a , l i v e r ? u k e . 4 . H o w d o e s e n d o c y t o s i s h e l p i s s i n g l e c e l l e d o r g a n i s m l i k e a m a e b a ? A n s . A m o e b a i s a u n i c e l l u l a r o r g a n i s m . A l l t h e p r o c e s s e s o f l i v i n g b e i n g a r e p e r f o r m e d i n t h i s o r g a n i s m . P l a s m a m e m b r a n e i s ? e x i b l e . S o a m o e b a c a n t a k e i t s f o o d f r o m s u r r o u n d i n g s . T h i s p r o c e s s i s c a l l e d e n d o c y t o s i s . 5 . W r i t e o n e w o r d f o r t h e f o l l o w i n g : - a . A g r o u p o f c e l l s h a v i n g s t r u c t u r e i n w h i c h c e l l s a r e a r r n a g e d i n a s p e c i a l o r d e r t o p e r f o r m a w o r k . b . T h e p r o c e s s o f t a k i n g p e r m a n e n t s h a p e a n d s i z e t o p e r f o r m a s p e c i a l f u n c t i o n . c . A n i m a l t i s s u e w h i c h a t t a c h e s m u s c l e s t o b o n e . d . K i n d l y s h a p e d c e l l s s u r r o u n d i n g t h e s t o m a t a . A n s . ( a ) T i s s u e ( b ) D i f f e r e n t i a t i o n ( c ) T e n d o r s ( d ) G u a r d c e l l s . 6 . ( a ) E x p l a i n t h e l a w o f c o n s e r v a t i o n o f e n e r g y . ( b ) G i v e o n e e x a m p l e o f e a c h e n e r g y t r a n s f o r m a t i o n : - ( i ) H e a t e n e r g y t o m e c h a n i c a l e n e r g y . ( i i ) M e c h a n i c a l e n e r g y t o e l e c t r i c e n e r g y . ( c ) A p e r s o n i s s t a n d i n g f r o m 2 0 m i n u t e s w i t h h e a v y w e i g h t o n h i s h e a d . D o e s h e d o 3 / 1 0 a n y w o r k o r n o t ? e x p l a i n . A n s . ( a ) A c c o r d i n g t o c o n s e r v a t i o n o f e n e r g y , " E n e r g y c a n n e i t h e r b e c r e a t e d n o r d e s t r o y e d " . I t c a n b e t r a n s f o r m e d f r o m o n e f o r m t o i t ' s a n o t h e r f o r m . T o t a l e n e r g y b e f o r e a n d a f t e r t r a n s f o r m a t i o n r e m a i n s t h e s a m e . ( b ) ( i ) H e a t i s f o r m e d b y b u r n i n g o f f u e l i n a n e n g i n e . T h i s h e a t e n e r g y i s c o n v e r t e d i n t o m e c h a n i c a l e n e r g y . ( i i ) I n a n e l e c t r i c g e n e r a t o r . M e c h a n i c a l e n e r g y i s c o n v e r t e d i n t o e l e c t r i c a l e n e r g y . 7 . ( a ) A n e l e c t r i c h e a t e r o f 2 0 0 0 W a l t i s w o r k i n g f o r 5 h o u r s . H o w m u c h e n e r g y i t c o n s u m e ? ( b ) C o n v e r t c o m m e r c i a l u n i t o f e n e r g y i n t o S . I . u n i t o f e n e r g y . A n s . ( a ) P o w e r o f e l e c t r i c h e a t e r ( P ) = 2 0 0 0 w T i m e o f u s e ( T ) = 5 H r C o n s u m e d e n e r g y ( E ) = P × t = 2 0 0 0 × 5 w h = k w × 5 h = 1 0 K w h . ( b ) C o m m e r c i a l u n i t o f e n e r g y = 1 K w h S . I . u n i t o f e n e r g y = 1 J o u l e 1 K w h = 1 0 0 0 × 6 0 × 6 0 w s = 3 . 6 × 1 0 6 J o u l e s . 8 . ( a ) D r a w a d i a g r a m s h o w i n g R u t h e r f o r d ' s r a y s s c a t t e r i n g e x p e r i m e n t s " . ( b ) W h y R u t h e r f o r d u s e d g o l d f o i l i n a b o v e s a i d e x p e r i m e n t ? A n s . ( a ) ( b ) R u t h e r f o r d c h o o s e g o l d f o i l b e c a u s e t h e y w a n t a v e r y t h i n l a y e r . T h i c k n e s s o f g o l d f o i l i s e q u a l t o t h e t h i c k n e s s o f 1 0 0 0 a t o m p u t t o g e t h e r . 9 . T h e n u m b e r o f n e u t r o n s a n d p r o t o n s i n t h e n u c l e i o f t w o a t o m s A a n d B i s a s f o l l o w : A B P r o t o n 8 8 4 / 1 0 N u e t r o n 8 1 0 ( a ) W r i t e a t o m i c m a s s o f A a n d B . ( b ) W r i t e t h e r e l a t i o n s h i p b e t w e e n A a n d B . ( c ) W r i t e e l e c t r o n i c c o n f i g u r a t i o n o f a t o m A a n d B . A n s . ( a ) B o t h A a n d B h a v e s a m e n u m b e r o f e l e c t r o n s , s o t h e y h a v e s a m e e l e c t r o n i c c o n f i g u r a t i o n = 8 = 2 , 6 1 0 . D i f f e r e n t i a t e t h e f o l l o w i n g ( W r i t e o n e d i f f e r e n c e ) ( a ) G y n m o s p e r m a n d a n g i o s p e r m ( b ) B i r d s ( A v e s ) a n d m a m m l a s . ( c ) M o n o c o t y l e t o n s a n d d i c o t y l e d o n s p l a n t s . A n s . ( a ) A n g i o s p e r m a r e ? o w e r i n g p l a n t s i n w h i c h s e e d s a r e f o u n d i n s i d e t h e ? u i t s . I n g y m n o s p e r m s s e e d s a r e n a k e d . ( b ) B i r d s a r e o v i p a r o u s a n i m a l s w i t h d r y s k i n c o v e r e d b y f e a t h e r s a n d w i n g s . T h e i r f o r e l i m b s a r e m o d i f i e d i n t o w i n g s . M a m m a l s a r e v i v i p a r o u s ( e x c e p t s o m e e x c e p t i o n s ) w i t h s w e a t a n d o i l g l a n d s o n t h e i r s k i n . ( c ) I n m o n o c o t y l e d o n s p l a n t s s e e d s c o n t a i n o n l y o n e c o t y l e d o n w h i l e i n d i c o t y l e d o n s p l a n t s s e e d s c o n t a i n t w o c o t y l e d o n s . 1 1 . W h a t i s f o r m u l a u n i t m a s s ? H o w d o e s i t c a l c u l a t e d ? C a l c u l a t e t h e f o r m u l a u n i t m a s s o f a c o m p o u n d N a 2 S 2 O 3 . ( N a = 2 3 u , S = 3 2 u , O = 1 6 u ) A n s . F o r m u l a U n i t M a s s : - I t i s t h e s u m o f a t o m i c m a s s o f i o n s o f a t o m s p r e s e n t i n f o r m u l a f o r a c o m p o u n d . F o r m u l a u n i t m a s s o f N a 2 S 2 O 3 = ( 2 × N a a t o m i c m a s s ) + ( 2 × S a t o m i c m a s s ) + ( 3 × O a t o m i c m a s s ) = ( 2 × 2 3 ) + ( 2 × 3 2 ) + ( 3 × 1 6 ) = 1 5 8 4 u . 1 2 . G i v e R e a s o n s : - ( a ) W h e n a b a l l d r o p p e d f r o m a h e i g h t , i t s s p e e d c o n t i n u o u s l y i n c r e a s e d . ( b ) W h e n w e s t o p p e d a l i n g a b i c y c l e , i t s s p e e d s l o w s d o w n . ( c ) W h e n a t r e e i s s h a k e n v i g o r o u s l y , i t s f r u i t s a n d l e a v e s f a l l d o w n . A n s . ( a ) W h e n a b a l l i s d r o p e d f r o m a h e i g h t . I t s s p e e d c o n t i n u o u s l y i n c r e a s e d d u e t o Page 5 1 / 1 0 C B S E C l a s s 9 - S c i e n c e G e n e r a l I n s t r u c t i o n s : i . T h e q u e s t i o n p a p e r c o m p r i s e s o f t h r e e S e c t i o n s A , B a n d C . Y o u a r e t o a t t e m p t a l l t h e s e c t i o n s . i i . A l l q u e s t i o n s a r e c o m p u l s o r y . i i i . T h e r e i s n o c h o i c e i n a n y o f t h e q u e s t i o n s . i v . A l l q u e s t i o n s o f S e c t i o n A , S e c t i o n B a r e t o b e a t t e m p t e d s e p a r a t e l y . v . Q u e s t i o n n u m b e r s 1 t o 2 i n S e c t i o n A a r e o n e m a r k q u e s t i o n s . T h e s e a r e t o b e a n s w e r e d i n o n e w o r d o r i n o n e s e n t e n c e . v i . Q u e s t i o n n u m b e r s 3 a n d 5 i n S e c t i o n A a r e t w o m a r k s q u e s t i o n s . T h e s e a r e t o b e a n s w e r e d i n a b o u t 3 0 w o r d s e a c h . v i i . Q u e s t i o n n u m b e r s 6 t o 1 5 i n S e c t i o n A a r e t h r e e m a r k s q u e s t i o n s . T h e s e a r e t o b e a n s w e r e d i n a b o u t 5 0 w o r d s e a c h . v i i i . Q u e s t i o n n u m b e r s 1 6 t o 2 1 i n S e c t i o n A a r e f v e m a r k s q u e s t i o n s . T h e s e a r e t o b e a n s w e r e d i n a b o u t 7 0 w o r d s e a c h . i x . Q u e s t i o n n u m b e r s 2 2 t o 2 7 i n S e c t i o n B a r e t w o m a r k s q u e s t i o n s b a s e d o n p r a c t i c a l s k i l l s . T h e s e a r e t o b e a n s w e r s i n a b o u t 3 0 w o r d s e a c h . S e c t i o n ' A ' 1 . A p e r s o n t r a v e l s 6 K m . i n a c i r c u l a r p a t h a n d r e a c h e s b a c k o n t h e s t a r t i n g p o i n t . C a l c u l a t e t h e d i s p l a c e m e n t . A n s . D i s p l a c e m e n t i s z e r o b e c a u s e s t a r t i n g p o i n t o f t h e j o u r n e y a n d e n d i n g p o i n t o f t h e j o u r n e y i s s a m e . 2 . W r i t e n a m e s o f s o l u t i o n s u s e d t o s t a i n p l a n t c e l l a n d a n i m a l c e l l w h i t e m a k i n g a s l i d e . A n s . S a f r a n i n e i s u s e d t o s t a i n p l a n t c e l l . M e t h y l e n e b l u e i s u s e d t o s t a i n a n i m a l c e l l . 2 / 1 0 3 . R e c o g n i s e t h e p h y l u m o f a n i m a l s o n t h e b a s i s o f c h a r a c t e r i s t i c s g i v e n . b e l o w . A l s o w r i t e o n e e x a m p l e s o f e a c h . A n s . a . C o e l o m i s f i l l e d w i t h b l o o d a n d l e g s a n d j o i n t e d . b . T h e s e a n i m a l a r e f r e e l i v i n g o r p a r a s i t e a n d t h e s e a r e c a l l e d ? a t w o r m s . c . P h y l u m - A r t h r o p o d a - e g - H o u s e ? y , b u t t e r ? y , s p i d e r e t c . T h e a n i m a l s h a v e c o e l o m f i l l e d w i t h b l o o d a n d j o i n t e d l e g s . d . P l a t y h e l m i n t h e s i s t h e p h y l u m o f ? a t w o r m s . T h e y a r e f r e e l i v i n g o r p a r a s i t e . e x a m p l e : p l a n a r i a , l i v e r ? u k e . 4 . H o w d o e s e n d o c y t o s i s h e l p i s s i n g l e c e l l e d o r g a n i s m l i k e a m a e b a ? A n s . A m o e b a i s a u n i c e l l u l a r o r g a n i s m . A l l t h e p r o c e s s e s o f l i v i n g b e i n g a r e p e r f o r m e d i n t h i s o r g a n i s m . P l a s m a m e m b r a n e i s ? e x i b l e . S o a m o e b a c a n t a k e i t s f o o d f r o m s u r r o u n d i n g s . T h i s p r o c e s s i s c a l l e d e n d o c y t o s i s . 5 . W r i t e o n e w o r d f o r t h e f o l l o w i n g : - a . A g r o u p o f c e l l s h a v i n g s t r u c t u r e i n w h i c h c e l l s a r e a r r n a g e d i n a s p e c i a l o r d e r t o p e r f o r m a w o r k . b . T h e p r o c e s s o f t a k i n g p e r m a n e n t s h a p e a n d s i z e t o p e r f o r m a s p e c i a l f u n c t i o n . c . A n i m a l t i s s u e w h i c h a t t a c h e s m u s c l e s t o b o n e . d . K i n d l y s h a p e d c e l l s s u r r o u n d i n g t h e s t o m a t a . A n s . ( a ) T i s s u e ( b ) D i f f e r e n t i a t i o n ( c ) T e n d o r s ( d ) G u a r d c e l l s . 6 . ( a ) E x p l a i n t h e l a w o f c o n s e r v a t i o n o f e n e r g y . ( b ) G i v e o n e e x a m p l e o f e a c h e n e r g y t r a n s f o r m a t i o n : - ( i ) H e a t e n e r g y t o m e c h a n i c a l e n e r g y . ( i i ) M e c h a n i c a l e n e r g y t o e l e c t r i c e n e r g y . ( c ) A p e r s o n i s s t a n d i n g f r o m 2 0 m i n u t e s w i t h h e a v y w e i g h t o n h i s h e a d . D o e s h e d o 3 / 1 0 a n y w o r k o r n o t ? e x p l a i n . A n s . ( a ) A c c o r d i n g t o c o n s e r v a t i o n o f e n e r g y , " E n e r g y c a n n e i t h e r b e c r e a t e d n o r d e s t r o y e d " . I t c a n b e t r a n s f o r m e d f r o m o n e f o r m t o i t ' s a n o t h e r f o r m . T o t a l e n e r g y b e f o r e a n d a f t e r t r a n s f o r m a t i o n r e m a i n s t h e s a m e . ( b ) ( i ) H e a t i s f o r m e d b y b u r n i n g o f f u e l i n a n e n g i n e . T h i s h e a t e n e r g y i s c o n v e r t e d i n t o m e c h a n i c a l e n e r g y . ( i i ) I n a n e l e c t r i c g e n e r a t o r . M e c h a n i c a l e n e r g y i s c o n v e r t e d i n t o e l e c t r i c a l e n e r g y . 7 . ( a ) A n e l e c t r i c h e a t e r o f 2 0 0 0 W a l t i s w o r k i n g f o r 5 h o u r s . H o w m u c h e n e r g y i t c o n s u m e ? ( b ) C o n v e r t c o m m e r c i a l u n i t o f e n e r g y i n t o S . I . u n i t o f e n e r g y . A n s . ( a ) P o w e r o f e l e c t r i c h e a t e r ( P ) = 2 0 0 0 w T i m e o f u s e ( T ) = 5 H r C o n s u m e d e n e r g y ( E ) = P × t = 2 0 0 0 × 5 w h = k w × 5 h = 1 0 K w h . ( b ) C o m m e r c i a l u n i t o f e n e r g y = 1 K w h S . I . u n i t o f e n e r g y = 1 J o u l e 1 K w h = 1 0 0 0 × 6 0 × 6 0 w s = 3 . 6 × 1 0 6 J o u l e s . 8 . ( a ) D r a w a d i a g r a m s h o w i n g R u t h e r f o r d ' s r a y s s c a t t e r i n g e x p e r i m e n t s " . ( b ) W h y R u t h e r f o r d u s e d g o l d f o i l i n a b o v e s a i d e x p e r i m e n t ? A n s . ( a ) ( b ) R u t h e r f o r d c h o o s e g o l d f o i l b e c a u s e t h e y w a n t a v e r y t h i n l a y e r . T h i c k n e s s o f g o l d f o i l i s e q u a l t o t h e t h i c k n e s s o f 1 0 0 0 a t o m p u t t o g e t h e r . 9 . T h e n u m b e r o f n e u t r o n s a n d p r o t o n s i n t h e n u c l e i o f t w o a t o m s A a n d B i s a s f o l l o w : A B P r o t o n 8 8 4 / 1 0 N u e t r o n 8 1 0 ( a ) W r i t e a t o m i c m a s s o f A a n d B . ( b ) W r i t e t h e r e l a t i o n s h i p b e t w e e n A a n d B . ( c ) W r i t e e l e c t r o n i c c o n f i g u r a t i o n o f a t o m A a n d B . A n s . ( a ) B o t h A a n d B h a v e s a m e n u m b e r o f e l e c t r o n s , s o t h e y h a v e s a m e e l e c t r o n i c c o n f i g u r a t i o n = 8 = 2 , 6 1 0 . D i f f e r e n t i a t e t h e f o l l o w i n g ( W r i t e o n e d i f f e r e n c e ) ( a ) G y n m o s p e r m a n d a n g i o s p e r m ( b ) B i r d s ( A v e s ) a n d m a m m l a s . ( c ) M o n o c o t y l e t o n s a n d d i c o t y l e d o n s p l a n t s . A n s . ( a ) A n g i o s p e r m a r e ? o w e r i n g p l a n t s i n w h i c h s e e d s a r e f o u n d i n s i d e t h e ? u i t s . I n g y m n o s p e r m s s e e d s a r e n a k e d . ( b ) B i r d s a r e o v i p a r o u s a n i m a l s w i t h d r y s k i n c o v e r e d b y f e a t h e r s a n d w i n g s . T h e i r f o r e l i m b s a r e m o d i f i e d i n t o w i n g s . M a m m a l s a r e v i v i p a r o u s ( e x c e p t s o m e e x c e p t i o n s ) w i t h s w e a t a n d o i l g l a n d s o n t h e i r s k i n . ( c ) I n m o n o c o t y l e d o n s p l a n t s s e e d s c o n t a i n o n l y o n e c o t y l e d o n w h i l e i n d i c o t y l e d o n s p l a n t s s e e d s c o n t a i n t w o c o t y l e d o n s . 1 1 . W h a t i s f o r m u l a u n i t m a s s ? H o w d o e s i t c a l c u l a t e d ? C a l c u l a t e t h e f o r m u l a u n i t m a s s o f a c o m p o u n d N a 2 S 2 O 3 . ( N a = 2 3 u , S = 3 2 u , O = 1 6 u ) A n s . F o r m u l a U n i t M a s s : - I t i s t h e s u m o f a t o m i c m a s s o f i o n s o f a t o m s p r e s e n t i n f o r m u l a f o r a c o m p o u n d . F o r m u l a u n i t m a s s o f N a 2 S 2 O 3 = ( 2 × N a a t o m i c m a s s ) + ( 2 × S a t o m i c m a s s ) + ( 3 × O a t o m i c m a s s ) = ( 2 × 2 3 ) + ( 2 × 3 2 ) + ( 3 × 1 6 ) = 1 5 8 4 u . 1 2 . G i v e R e a s o n s : - ( a ) W h e n a b a l l d r o p p e d f r o m a h e i g h t , i t s s p e e d c o n t i n u o u s l y i n c r e a s e d . ( b ) W h e n w e s t o p p e d a l i n g a b i c y c l e , i t s s p e e d s l o w s d o w n . ( c ) W h e n a t r e e i s s h a k e n v i g o r o u s l y , i t s f r u i t s a n d l e a v e s f a l l d o w n . A n s . ( a ) W h e n a b a l l i s d r o p e d f r o m a h e i g h t . I t s s p e e d c o n t i n u o u s l y i n c r e a s e d d u e t o 5 / 1 0 f o r c e o f g r a v i t y ( a c c e l e r a t i o n d u e t o g r a v i t y i n c r e a s e o n c o m i n g d o w n w a r d s ) . ( b ) W h e n w e s t o p p e d a l i n g a b i c y c l e , i t s s p e e d s l o w s d o w n d u e t o a i r r e s i s t a n c e a n d f o r c e o f f r i c t i o n b e t w e e n t y p e o f b i c y c l e a n d s u r f a c e o f r o a d . S o r e t a r d a t i o n f o r c e i s c r e a t e d w h i c h s t o p t h e b i c y c l e . ( c ) W h e n t r e e i s s h a k e n . I t m o v e s t o a n d s l i g h t l y b u t i t s f r u i t s a n d l e a v e t e n d s t o r e m a i n a t r e s t d u e t o t h e i r i n e r t i a a n d h e n c e d e t a c h e d f r o m t h e t r e e a n d f a l l d o w n . 1 3 . C a t t l e f a r m i n g . p o u l t r y a n d f i s h f a r m i n g a r e i n c l u d e d i n a n i m a l h u s b a n d r y . W h a t i s t h e n e e d o f a n i m a l h u s b a n d r y . A n s . M a n a g e m e n t o f c a t t l e f a r m i n g i s k n o w n a s a n i m a l h u s b a n d r y . I t i n c l u d e s v a r i o u s t a s k s s u c h a s g i v i n g f o o d t o c a t t l e s , a n i m a l s , s h e l t e r , b r e e d i n g , h e a l t h , d i s e a s e c o n t r o l a n d p r o p e r e c o n o m i c u t i l i z a t i o n . A n i m a l f a r m i n g i n c l u d e s c o w , b u f f a l o , g o a t , s h e e p , c a m e l , p o u l t r y , a n d f i s h e r i e s . D u e t o i n c r e a s i n g p o p u l a t i o n , d e m a n d f o r m i l k , e g g s , m e a t e t c i s a l s o i n c r e a s e d . N o w f a r m e r s t a k e u p a n i m a l h u s b a n d r y o n c o m m e r c i a l b a s i s s o i t n e e d s s c i e n t i f i c m a n a g e m e n t p r a c t i c e s . c a t t l e f a r m i n g i s d o n e f o r m i l k a n d a g r i c u l t u r a l w o r k . B y p o u l t r y w e i n c r e a s e m e a t a n e g g s p r o d u c t i o n . f i s h e r i e s i s a c h e a p s o u r c e o f p r o t e i n f o o d . 1 4 . ( a ) M e r i s t e m a t i c c e l l c o n t a i n s d e n s e o r a b u n d a n t c y t o p l a s m a s i n g l e l a r g e n u c l e u s b u t n o v a c u o l e . ( b ) I n s c l e r e n c h y m a t i s s u e i n t e r c e l l u l a r s p a c e i s a b s e n t i n b e t w e e n t h e c e l l s . ( c ) I n x e r o p h y t i c p l a n t s , e p i d e r m i s i s c o v e r e d w i t h c u t i n . G i v e R e a s o n : - A n s . ( a ) C e l l s o f m e r i s t e m s d i v i d e c o n t i n u o u s l y a n d h e l p i n i n c r e a s i n g t h e l e n g t h a n d g i r t h o f t h e p l a n t s , s o t h e y h a v e a b u n d a n t c y t o p l a s m a n d p r o m i n e n t n u c l e u s , t h i n c e l l w a l l b u t n o v a c u o l e s . V a c u o l e i s l i k e a b a g w h i c h s t o r e o r l i q u i d s u b s t a n c e s . M e r i s t e m a t i c c e l l s d o n o t h a v e s t a r e d f o o d i n t h e m . ( b ) I n s c l e r e n c h y m a t i s s u e i n t e r c e l l u l a r s p a c e i s a b s e n t i n b e t w e e n t h e c e l l s b e c a u s e t h e s e c e l l s a r e d e a d a n d c e l l w a l l s a r e t h i c k e d d u e t o d e p o s i t i o n o f l i g n i n w h i c h a c t s a s c e m e n t . ( c ) I n x e r o p h y t e p l a n t s , e p i d e r m i s i s c o v e r e d w i t h c u t i n . C u t i n i s a l a y e r w h i c h r e s i s t s t r a n s p o r t o f w a t e r t h r o u g h i t . D e s e r t h a v e a l i t t l e w a t e r . C u t i n p r o t e c t s c e l l s f o r m d r y n e s s a n d a l s o c h e c k t r a n s p i r a t i o n f r o m l e a v e s . 1 5 . A b i k e i s m o v i n g w i t h a v e l o c i t y o f 9 0 K m / h r . A f t e r a p p l y i n g b r e a k i t s t o p i n 5 s e c . C a l c u l a t e t h e f o r c e a p p l i e d b y b r e a k s . M a s s o f m o t o r c y c l e a n d r i d e s i s 2 0 0 K g .Read More
FAQs on CBSE Sample Paper - 3, Science, Class 9
| 1. What is the CBSE Class 9 Science Sample Paper - 3? |  |
Ans. The CBSE Class 9 Science Sample Paper - 3 is a practice paper designed by the Central Board of Secondary Education (CBSE) for students appearing for the Class 9 Science exam. It contains a set of questions that are similar to the actual exam and can help students prepare for the exam effectively.
| 2. How can I access the CBSE Class 9 Science Sample Paper - 3? | |
Ans. The CBSE Class 9 Science Sample Paper - 3 can be accessed online through the official website of CBSE or through various educational websites that provide study materials and sample papers for CBSE exams. It is advisable to solve the sample paper in a timed manner to get a realistic exam experience.
| 3. Are the questions in the CBSE Class 9 Science Sample Paper - 3 similar to the actual exam? | |
Ans. Yes, the questions in the CBSE Class 9 Science Sample Paper - 3 are designed to be similar to the ones that students can expect in the actual exam. The sample paper is created by experts who are familiar with the CBSE syllabus and exam pattern, ensuring that it covers all the important topics and concepts.
| 4. How can solving the CBSE Class 9 Science Sample Paper - 3 benefit me? | |
Ans. Solving the CBSE Class 9 Science Sample Paper - 3 can benefit students in multiple ways. It helps them understand the exam pattern, time management, and the types of questions that can be asked in the exam. Regular practice with sample papers can improve their problem-solving skills, boost confidence, and enhance their overall performance in the actual exam.
| 5. Are there any other resources available for CBSE Class 9 Science exam preparation? | |
Ans. Yes, apart from the CBSE Class 9 Science Sample Paper - 3, there are several other resources available for exam preparation. Students can refer to the NCERT textbook, solve previous years' question papers, access online study materials and video tutorials, and participate in mock tests and quizzes. It is important to have a comprehensive study plan and utilize these resources effectively for better exam preparation.
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