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T i m e 	 : 	 2 . 3 0 	 H r s .
M . M . 	 : 	 5 0
G e n e r a l 	 I n s t r u c t i o n s 	 :
1 . 	 A l l 	 t h e 	 q u e s t i o n s 	 a r e 	 c o m p u l s o r y .
2 . 	 P l e a s e 	 w r i t e 	 d o w n 	 t h e 	 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 .
3 . 	 T h e 	 q u e s t i o n 	 p a p e r 	 c o n s i s t s 	 o f 	 2 0 	 q u e s t i o n s 	 a n d 	 i t 	 i s 	 d i v i d e d 	 i n t o 	 f o u r 	 s e c t i o n 	 A , 	 B , 	 C , 	 a n d
D .
4 . 	 S e c t i o n 	 A 	 C o m p r i s e s 	 o f 	 5 	 q u e s t i o n s 	 C a r r y i n g 	 1 	 m a r k 	 e a c h .
5 . 	 S e c t i o n 	 B 	 c o m p r i s e s 	 o f 	 6 	 q u e s t i o n s 	 c a r r y i n g 	 2 	 m a r k s 	 e a c h .
6 . 	 S e c t i o n 	 C 	 c o m p r i s e s 	 o f 	 6 	 q u e s t i o n s 	 c a r r y i n g 	 3 	 m a r k s 	 e a c h .
7 . 	 S e c t i o n 	 D 	 c o m p r i s e s 	 o f 	 3 	 q u e s t i o n s 	 c a r r y i n g 	 5 	 m a r k s 	 e a c h .
8 . 	 T h e r e 	 i s 	 n o 	 o v e r a l l 	 c h o i c e . 	 H o w e v e r , 	 a n 	 i n t e r n a l 	 c h o i c e 	 h a s 	 b e e n 	 p r o v i d e d 	 i n 	 a 	 q u e s t i o n
o f 	 2 	 m a r k s 	 a n d 	 1 	 q u e s t i o n 	 o f 	 5 	 m a r k s 	 e a c h .
S E C T I O N 	 ' A '
1 . 	 W h a t 	 i s 	 t h e 	 e f f e c t 	 o f 	 a c i d 	 o n 	 b l u e 	 l i t m u s 	 a n d 	 r e d 	 l i t m u s 	 p a p e r s ? 	
2 . 	 W h a t 	 i s 	 t h e 	 n o r m a l 	 r a n g e 	 o f 	 b r e a t h i n g 	 r a t e 	 p e r 	 m i n u t e 	 i n 	 a n 	 a v e r a g e 	 a d u l t 	 p e r s o n 	 i n
r e s t i n g 	 p o s i t i o n ? 	
3 . 	 W h i c h 	 b i o l o g i c a l 	 p r o c e s s 	 r e l e a s e s 	 e n e r g y 	 f r o m 	 t h e 	 f o o d ? 	
4 . 	 D e f i n e 	 t i s s u e . 	
5 . 	 D u r i n g 	 i n h a l a t i o n , 	 w h a t 	 i s 	 t h e 	 p o s i t i o n 	 o f 	 d i a p h r a g m ?
S E C T I O N 	 ' B '
6 . 	 S t a t e 	 t w o 	 d i f f e r e n c e s 	 b e t w e e n 	 a 	 c o n v e x 	 a n d 	 a 	 c o n c a v e 	 l e n s .
7 . 	 D e f i n e 	 t h e 	 f o l l o w i n g 	 t e r m s :
i . 	 Z y g o t e
i i . 	 E m b r y o
8 . 	 N a m e 	 o f 	 f o l l o w i n g 	 :
Page 2


T i m e 	 : 	 2 . 3 0 	 H r s .
M . M . 	 : 	 5 0
G e n e r a l 	 I n s t r u c t i o n s 	 :
1 . 	 A l l 	 t h e 	 q u e s t i o n s 	 a r e 	 c o m p u l s o r y .
2 . 	 P l e a s e 	 w r i t e 	 d o w n 	 t h e 	 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 .
3 . 	 T h e 	 q u e s t i o n 	 p a p e r 	 c o n s i s t s 	 o f 	 2 0 	 q u e s t i o n s 	 a n d 	 i t 	 i s 	 d i v i d e d 	 i n t o 	 f o u r 	 s e c t i o n 	 A , 	 B , 	 C , 	 a n d
D .
4 . 	 S e c t i o n 	 A 	 C o m p r i s e s 	 o f 	 5 	 q u e s t i o n s 	 C a r r y i n g 	 1 	 m a r k 	 e a c h .
5 . 	 S e c t i o n 	 B 	 c o m p r i s e s 	 o f 	 6 	 q u e s t i o n s 	 c a r r y i n g 	 2 	 m a r k s 	 e a c h .
6 . 	 S e c t i o n 	 C 	 c o m p r i s e s 	 o f 	 6 	 q u e s t i o n s 	 c a r r y i n g 	 3 	 m a r k s 	 e a c h .
7 . 	 S e c t i o n 	 D 	 c o m p r i s e s 	 o f 	 3 	 q u e s t i o n s 	 c a r r y i n g 	 5 	 m a r k s 	 e a c h .
8 . 	 T h e r e 	 i s 	 n o 	 o v e r a l l 	 c h o i c e . 	 H o w e v e r , 	 a n 	 i n t e r n a l 	 c h o i c e 	 h a s 	 b e e n 	 p r o v i d e d 	 i n 	 a 	 q u e s t i o n
o f 	 2 	 m a r k s 	 a n d 	 1 	 q u e s t i o n 	 o f 	 5 	 m a r k s 	 e a c h .
S E C T I O N 	 ' A '
1 . 	 W h a t 	 i s 	 t h e 	 e f f e c t 	 o f 	 a c i d 	 o n 	 b l u e 	 l i t m u s 	 a n d 	 r e d 	 l i t m u s 	 p a p e r s ? 	
2 . 	 W h a t 	 i s 	 t h e 	 n o r m a l 	 r a n g e 	 o f 	 b r e a t h i n g 	 r a t e 	 p e r 	 m i n u t e 	 i n 	 a n 	 a v e r a g e 	 a d u l t 	 p e r s o n 	 i n
r e s t i n g 	 p o s i t i o n ? 	
3 . 	 W h i c h 	 b i o l o g i c a l 	 p r o c e s s 	 r e l e a s e s 	 e n e r g y 	 f r o m 	 t h e 	 f o o d ? 	
4 . 	 D e f i n e 	 t i s s u e . 	
5 . 	 D u r i n g 	 i n h a l a t i o n , 	 w h a t 	 i s 	 t h e 	 p o s i t i o n 	 o f 	 d i a p h r a g m ?
S E C T I O N 	 ' B '
6 . 	 S t a t e 	 t w o 	 d i f f e r e n c e s 	 b e t w e e n 	 a 	 c o n v e x 	 a n d 	 a 	 c o n c a v e 	 l e n s .
7 . 	 D e f i n e 	 t h e 	 f o l l o w i n g 	 t e r m s :
i . 	 Z y g o t e
i i . 	 E m b r y o
8 . 	 N a m e 	 o f 	 f o l l o w i n g 	 :
i . 	 T h e 	 a i r 	 t u b e s 	 o f 	 i n s e c t s
i i . 	 A n 	 a n a e r o b i c 	 o r g a n i s m
9 . 	 H o w 	 m a n y 	 c o l o u r s 	 a r e 	 p r e s e n t 	 i n 	 a 	 r a i n b o w ? 	 S t a t e 	 t h e m .
1 0 . 	 M a t c h 	 t h e 	 f o l l o w i n g 	 :
C o l u m n 	 I C o l u m n 	 I I
( i ) 	 C i r c u l a t o r y 	 s y s t e m ( a ) 	 K i d n e y s , 	 u r e t e r s , 	 u r i n a r y 	 b l a d d e r
( i i ) 	 S w e a t ( b ) 	 H e a r t 	 a n d 	 b l o o d 	 v e s s e l s
( i i i ) 	 E x c r e t o r y 	 s y s t e m ( c ) 	 S a l t s , 	 u r e a 	 a n d 	 w a t e r
( i v ) 	 B l o o d 	 ( d ) 	 R B C , 	 W B C , 	 P l a t e l e t s
	 ( e ) 	 X y l e m , 	 p h l o e m
1 1 . 	 D r a w 	 t h e 	 s y m b o l s 	 o f 	 t h e 	 f o l l o w i n g 	 e l e c t r i c 	 c i r c u i t 	 c o m p o n e n t s 	 :
i . 	 B a t t e r y 	
i i . 	 E l e c t r i c 	 c e l l
i i i . 	 E l e c t r i c 	 b u l b
i v . 	 S w i t c h 	 i n 	 ' o f f ' 	 p o s i t i o n
O R
D r a w 	 a n 	 e l e c t r i c 	 c i r c u i t 	 d i a g r a m 	 s h o w i n g 	 a n 	 e l e c t r i c 	 b u l b 	 g l o w i n g .
S E C T I O N 	 ' C '
1 2 . 	 D i f f e r e n t i a t e 	 b e t w e e n 	 a e r o b i c 	 r e s p i r a t i o n 	 a n d 	 a n a e r o b i c 	 r e s p i r a t i o n . 	 ( A n y 	 t h r e e )
1 3 . 	 D r a w 	 a 	 s c h e m a t i c 	 d i a g r a m 	 o f 	 c i r c u l a t i o n 	 o f 	 b l o o d 	 i n 	 h u m a n 	 b e i n g s 	 a n d 	 l a b e l 	 v a r i o u s
p a r t s 	 o f 	 i t .
1 4 . 	 N a m e 	 a n y 	 t w o 	 e f f e c t s 	 o f 	 e l e c t r i c 	 c u r r e n t . 	 L i s t 	 t w o 	 d e v i c e s 	 i n 	 e a c h 	 c a s e 	 i n 	 w h i c h 	 t h e s e
e f f e c t s 	 a r e 	 b e i n g 	 u t i l i z e d .
1 5 . 	 W h a t 	 a r e 	 t h e 	 t h r e e 	 c h a r a c t e r i s t i c s 	 o f 	 t h e 	 i m a g e 	 f o r m e d 	 b y 	 a 	 p l a n e 	 m i r r o r ?
1 6 . 	 W h a t 	 i s 	 e l e c t r i c 	 f u s e ? 	 W r i t e 	 i t s 	 t w o 	 f u n c t i o n s 	 i n 	 a n 	 e l e c t r i c 	 c i r c u i t .
1 7 . 	 i . 	 W h a t 	 d o 	 y o u 	 m e a n 	 b y 	 t h e 	 t e r m 	 ‘ t i m e 	 p e r i o d ’ ?
i i . 	 A 	 s i m p l e 	 p e n d u l u m 	 t a k e s 	 6 4 s 	 t o 	 c o m p l e t e 	 4 0 	 o s c i l l a t i o n s . 	 W h a t 	 i s 	 t h e 	 t i m e - p e r i o d 	 o f
t h e 	 p e n d u l u m ?
S E C T I O N 	 ' D '
Page 3


T i m e 	 : 	 2 . 3 0 	 H r s .
M . M . 	 : 	 5 0
G e n e r a l 	 I n s t r u c t i o n s 	 :
1 . 	 A l l 	 t h e 	 q u e s t i o n s 	 a r e 	 c o m p u l s o r y .
2 . 	 P l e a s e 	 w r i t e 	 d o w n 	 t h e 	 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 .
3 . 	 T h e 	 q u e s t i o n 	 p a p e r 	 c o n s i s t s 	 o f 	 2 0 	 q u e s t i o n s 	 a n d 	 i t 	 i s 	 d i v i d e d 	 i n t o 	 f o u r 	 s e c t i o n 	 A , 	 B , 	 C , 	 a n d
D .
4 . 	 S e c t i o n 	 A 	 C o m p r i s e s 	 o f 	 5 	 q u e s t i o n s 	 C a r r y i n g 	 1 	 m a r k 	 e a c h .
5 . 	 S e c t i o n 	 B 	 c o m p r i s e s 	 o f 	 6 	 q u e s t i o n s 	 c a r r y i n g 	 2 	 m a r k s 	 e a c h .
6 . 	 S e c t i o n 	 C 	 c o m p r i s e s 	 o f 	 6 	 q u e s t i o n s 	 c a r r y i n g 	 3 	 m a r k s 	 e a c h .
7 . 	 S e c t i o n 	 D 	 c o m p r i s e s 	 o f 	 3 	 q u e s t i o n s 	 c a r r y i n g 	 5 	 m a r k s 	 e a c h .
8 . 	 T h e r e 	 i s 	 n o 	 o v e r a l l 	 c h o i c e . 	 H o w e v e r , 	 a n 	 i n t e r n a l 	 c h o i c e 	 h a s 	 b e e n 	 p r o v i d e d 	 i n 	 a 	 q u e s t i o n
o f 	 2 	 m a r k s 	 a n d 	 1 	 q u e s t i o n 	 o f 	 5 	 m a r k s 	 e a c h .
S E C T I O N 	 ' A '
1 . 	 W h a t 	 i s 	 t h e 	 e f f e c t 	 o f 	 a c i d 	 o n 	 b l u e 	 l i t m u s 	 a n d 	 r e d 	 l i t m u s 	 p a p e r s ? 	
2 . 	 W h a t 	 i s 	 t h e 	 n o r m a l 	 r a n g e 	 o f 	 b r e a t h i n g 	 r a t e 	 p e r 	 m i n u t e 	 i n 	 a n 	 a v e r a g e 	 a d u l t 	 p e r s o n 	 i n
r e s t i n g 	 p o s i t i o n ? 	
3 . 	 W h i c h 	 b i o l o g i c a l 	 p r o c e s s 	 r e l e a s e s 	 e n e r g y 	 f r o m 	 t h e 	 f o o d ? 	
4 . 	 D e f i n e 	 t i s s u e . 	
5 . 	 D u r i n g 	 i n h a l a t i o n , 	 w h a t 	 i s 	 t h e 	 p o s i t i o n 	 o f 	 d i a p h r a g m ?
S E C T I O N 	 ' B '
6 . 	 S t a t e 	 t w o 	 d i f f e r e n c e s 	 b e t w e e n 	 a 	 c o n v e x 	 a n d 	 a 	 c o n c a v e 	 l e n s .
7 . 	 D e f i n e 	 t h e 	 f o l l o w i n g 	 t e r m s :
i . 	 Z y g o t e
i i . 	 E m b r y o
8 . 	 N a m e 	 o f 	 f o l l o w i n g 	 :
i . 	 T h e 	 a i r 	 t u b e s 	 o f 	 i n s e c t s
i i . 	 A n 	 a n a e r o b i c 	 o r g a n i s m
9 . 	 H o w 	 m a n y 	 c o l o u r s 	 a r e 	 p r e s e n t 	 i n 	 a 	 r a i n b o w ? 	 S t a t e 	 t h e m .
1 0 . 	 M a t c h 	 t h e 	 f o l l o w i n g 	 :
C o l u m n 	 I C o l u m n 	 I I
( i ) 	 C i r c u l a t o r y 	 s y s t e m ( a ) 	 K i d n e y s , 	 u r e t e r s , 	 u r i n a r y 	 b l a d d e r
( i i ) 	 S w e a t ( b ) 	 H e a r t 	 a n d 	 b l o o d 	 v e s s e l s
( i i i ) 	 E x c r e t o r y 	 s y s t e m ( c ) 	 S a l t s , 	 u r e a 	 a n d 	 w a t e r
( i v ) 	 B l o o d 	 ( d ) 	 R B C , 	 W B C , 	 P l a t e l e t s
	 ( e ) 	 X y l e m , 	 p h l o e m
1 1 . 	 D r a w 	 t h e 	 s y m b o l s 	 o f 	 t h e 	 f o l l o w i n g 	 e l e c t r i c 	 c i r c u i t 	 c o m p o n e n t s 	 :
i . 	 B a t t e r y 	
i i . 	 E l e c t r i c 	 c e l l
i i i . 	 E l e c t r i c 	 b u l b
i v . 	 S w i t c h 	 i n 	 ' o f f ' 	 p o s i t i o n
O R
D r a w 	 a n 	 e l e c t r i c 	 c i r c u i t 	 d i a g r a m 	 s h o w i n g 	 a n 	 e l e c t r i c 	 b u l b 	 g l o w i n g .
S E C T I O N 	 ' C '
1 2 . 	 D i f f e r e n t i a t e 	 b e t w e e n 	 a e r o b i c 	 r e s p i r a t i o n 	 a n d 	 a n a e r o b i c 	 r e s p i r a t i o n . 	 ( A n y 	 t h r e e )
1 3 . 	 D r a w 	 a 	 s c h e m a t i c 	 d i a g r a m 	 o f 	 c i r c u l a t i o n 	 o f 	 b l o o d 	 i n 	 h u m a n 	 b e i n g s 	 a n d 	 l a b e l 	 v a r i o u s
p a r t s 	 o f 	 i t .
1 4 . 	 N a m e 	 a n y 	 t w o 	 e f f e c t s 	 o f 	 e l e c t r i c 	 c u r r e n t . 	 L i s t 	 t w o 	 d e v i c e s 	 i n 	 e a c h 	 c a s e 	 i n 	 w h i c h 	 t h e s e
e f f e c t s 	 a r e 	 b e i n g 	 u t i l i z e d .
1 5 . 	 W h a t 	 a r e 	 t h e 	 t h r e e 	 c h a r a c t e r i s t i c s 	 o f 	 t h e 	 i m a g e 	 f o r m e d 	 b y 	 a 	 p l a n e 	 m i r r o r ?
1 6 . 	 W h a t 	 i s 	 e l e c t r i c 	 f u s e ? 	 W r i t e 	 i t s 	 t w o 	 f u n c t i o n s 	 i n 	 a n 	 e l e c t r i c 	 c i r c u i t .
1 7 . 	 i . 	 W h a t 	 d o 	 y o u 	 m e a n 	 b y 	 t h e 	 t e r m 	 ‘ t i m e 	 p e r i o d ’ ?
i i . 	 A 	 s i m p l e 	 p e n d u l u m 	 t a k e s 	 6 4 s 	 t o 	 c o m p l e t e 	 4 0 	 o s c i l l a t i o n s . 	 W h a t 	 i s 	 t h e 	 t i m e - p e r i o d 	 o f
t h e 	 p e n d u l u m ?
S E C T I O N 	 ' D '
1 8 . 	 D e s c r i b e 	 a n y 	 t h r e e 	 w a y s 	 b y 	 w h i c h 	 s e e d s 	 a r e 	 d i s p e r s e d 	 w i t h 	 e x a m p l e s .
1 9 . 	 W r i t e 	 t h e 	 r e a s o n s 	 b e h i n d 	 f o l l o w i n g 	 :
1 . 	 W h e n 	 y o u 	 s u f f e r 	 f r o m 	 a c i d i t y , 	 a n 	 a n t a c i d 	 i s 	 t a k e n .
2 . 	 F a c t o r i e s 	 w a s t e 	 i s 	 n e u t r a l i z e d 	 b e f o r e 	 d i s p o s i n g 	 i t 	 i n t o 	 t h e 	 w a t e r 	 b o d i e s .
2 0 . 	 S a l m a 	 t a k e s 	 1 5 	 m i n u t e s 	 f r o m 	 h e r 	 h o u s e 	 t o 	 r e a c h 	 h e r 	 s c h o o l 	 o n 	 a 	 b i c y c l e . 	 I f 	 t h e 	 b i c y c l e 	 h a s
a 	 s p e e d 	 o f 	 2 	 m / s , 	 c a l c u l a t e 	 t h e 	 d i s t a n c e 	 b e t w e e n 	 h e r 	 h o u s e 	 a n d 	 t h e 	 s c h o o l .
O R
C l a s s i f y 	 t h e 	 f o l l o w i n g 	 a s 	 m o t i o n 	 a l o n g 	 a 	 s t r a i g h t 	 l i n e , 	 c i r c u l a r 	 o r 	 o s c i l l a t o r y 	 m o t i o n :
i . 	 M o t i o n 	 o f 	 a 	 b u s 	 o n 	 a 	 s t r a i g h t 	 r o a d
i i . 	 M o t i o n 	 o f 	 a 	 c h i l d 	 o n 	 a 	 s w i n g
i i i . 	 M o t i o n 	 o f 	 a 	 m i n u t e 	 h a n d 	 i n 	 t h e 	 c l o c k
i v . 	 M o t i o n 	 o f 	 t h e 	 p e d a l s 	 o f 	 a 	 b i c y c l e
v . 	 M o t i o n 	 o f 	 a 	 m e t r o 	 o n 	 t h e 	 s t r a i g h t 	 b r i d g e
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FAQs on Class 7 Science: CBSE Past Year Paper - 4 - Science Class 7

1. What is the importance of studying past year papers for Class 7 Science?
Ans. Studying past year papers for Class 7 Science is important as it helps students understand the exam pattern, marking scheme, and types of questions asked. It allows them to practice and assess their knowledge, identify weak areas, and improve their performance in the actual exam.
2. How can studying past year papers help in preparing for the Class 7 Science exam?
Ans. Studying past year papers helps in preparing for the Class 7 Science exam by familiarizing students with the format and structure of the questions. It gives them an idea of the important topics, concepts, and their weightage in the exam. By solving these papers, students can practice time management, improve their speed, and gain confidence in answering different types of questions.
3. Are the questions in the past year papers of Class 7 Science similar to the actual exam?
Ans. Yes, the questions in the past year papers of Class 7 Science are usually similar to the actual exam. While the specific questions may vary, the papers generally follow the same syllabus and cover the important topics. Therefore, practicing these papers gives students a good idea of the type of questions they can expect in the actual exam.
4. Can studying past year papers help in scoring better marks in the Class 7 Science exam?
Ans. Yes, studying past year papers can help in scoring better marks in the Class 7 Science exam. By practicing these papers, students become familiar with the exam pattern, gain confidence, and improve their understanding of the subject. They can also identify common question patterns and important topics, which can help them prepare more effectively and increase their chances of scoring well.
5. How should one utilize the past year papers of Class 7 Science for effective preparation?
Ans. To utilize the past year papers of Class 7 Science effectively, students should start by solving the papers under exam-like conditions to assess their knowledge and identify weak areas. They should analyze their mistakes, understand the correct answers, and revise the related concepts. It is also beneficial to solve the papers multiple times to improve speed and accuracy. Additionally, students should refer to their textbooks, study guides, and other resources to strengthen their understanding of the topics covered in the papers.
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