Class 6 Exam > Class 6 Notes > Class 6 Science: CBSE Past Year Paper - 5
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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 2 8 q u e s t i o n s a n d 4 p r i n t e d p a g e s . 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 . 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 . D r a w w e l l - l a b e l l e d d i a g r a m w h e r e v e r n e c e s s a r y . 1 . C h o o s e t h e c o r r e c t a n s w e r : a . W a s t e i s r e m o v e d b y a n i m a l s b y t h e p r o c e s s o f _ _ _ _ _ _ . i . d i g e s t i o n i i . r e s p i r a t i o n i i i . e x c r e t i o n i v . i n g e s t i o n b . W h i c h o f t h e s e i s a p u r e s u b s t a n c e ? i . a i r i i . m i l k i i i . d i s t i l l e d w a t e r i v . o i l c . W h i c h o f t h e s e d o a l l l i v i n g o r g a n i s m s h a v e ? i . m u s c l e s i i . b o n e s i i i . s k i n i v . c e l l s d . F i s h e s b r e a t h e t h r o u g h _ _ _ _ _ _ . i . g i l l s 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 2 8 q u e s t i o n s a n d 4 p r i n t e d p a g e s . 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 . 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 . D r a w w e l l - l a b e l l e d d i a g r a m w h e r e v e r n e c e s s a r y . 1 . C h o o s e t h e c o r r e c t a n s w e r : a . W a s t e i s r e m o v e d b y a n i m a l s b y t h e p r o c e s s o f _ _ _ _ _ _ . i . d i g e s t i o n i i . r e s p i r a t i o n i i i . e x c r e t i o n i v . i n g e s t i o n b . W h i c h o f t h e s e i s a p u r e s u b s t a n c e ? i . a i r i i . m i l k i i i . d i s t i l l e d w a t e r i v . o i l c . W h i c h o f t h e s e d o a l l l i v i n g o r g a n i s m s h a v e ? i . m u s c l e s i i . b o n e s i i i . s k i n i v . c e l l s d . F i s h e s b r e a t h e t h r o u g h _ _ _ _ _ _ . i . g i l l s i i . l u n g s i i i . n o s t r i l i v . n o s e e . T h e e d i b l e p a r t o f s u g a r c a n e i s a _ _ _ _ _ _ . i . f l o w e r i i . l e a f i i i . r o o t i v . s t e m f . T h e q u i c k e s t s o u r c e o f e n e r g y i s _ _ _ _ _ _ . i . s u g a r i i . f a t i i i . p r o t e i n i v . s t e m 2 . R e w r i t e t h e c o r r e c t w o r d b y c h a n g i n g t h e u n d e r l i n e d w o r d s : a . R e f i n e d o i l i s a t r a n s p a r e n t s u b s t a n c e . b . W h e a t g r a i n c a n b e s e p a r a t e d f r o m c h a f f b y s e d i m e n t a t i o n c . F r e e z i n g o f w a t e r i s a i r r e v e r s i b l e c h a n g e . d . I r o n f i l i n g s c a n b e s e p a r a t e d f r o m s a n d b y e v a p o r a t i o n . 3 . F i l l i n t h e b l a n k s w i t h a p p r o p r i a t e w o r d : a . T h e r e a r e a b o u t 1 1 7 d i f f e r e n t t y p e s o f _ _ _ _ _ _ . b . S u b s t a n c e s t h a t a r e f o r m e d a s a r e s u l t o f a c h e m i c a l r e a c t i o n a r e c a l l e d _ _ _ _ _ _ . c . T h e m a s s p e r u n i t v o l u m e o f a s u b s t a n c e i s c a l l e d _ _ _ _ _ _ . d . A / A n _ _ _ _ _ _ c o n t a i n s o n l y o n e k i n d o f a t o m s . 4 . 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 : a . S y n t h e t i c f i b r e s a r e u s e d i n m a k i n g u m b r e l l a s . b . A m e t r o r a i l c o n s u m e s f u e l , c a n r u n b u t i s n o t a l i v i n g t h i n g . c . T h e h a n d l e o f a p r e s s u r e c o o k e r i s c o v e r e d w i t h p l a s t i c . d . W e a r i n g m a n y l a y e r s o f c o t t o n w i l l k e e p u s w a r m i n w i n t e r s . 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 2 8 q u e s t i o n s a n d 4 p r i n t e d p a g e s . 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 . 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 . D r a w w e l l - l a b e l l e d d i a g r a m w h e r e v e r n e c e s s a r y . 1 . C h o o s e t h e c o r r e c t a n s w e r : a . W a s t e i s r e m o v e d b y a n i m a l s b y t h e p r o c e s s o f _ _ _ _ _ _ . i . d i g e s t i o n i i . r e s p i r a t i o n i i i . e x c r e t i o n i v . i n g e s t i o n b . W h i c h o f t h e s e i s a p u r e s u b s t a n c e ? i . a i r i i . m i l k i i i . d i s t i l l e d w a t e r i v . o i l c . W h i c h o f t h e s e d o a l l l i v i n g o r g a n i s m s h a v e ? i . m u s c l e s i i . b o n e s i i i . s k i n i v . c e l l s d . F i s h e s b r e a t h e t h r o u g h _ _ _ _ _ _ . i . g i l l s i i . l u n g s i i i . n o s t r i l i v . n o s e e . T h e e d i b l e p a r t o f s u g a r c a n e i s a _ _ _ _ _ _ . i . f l o w e r i i . l e a f i i i . r o o t i v . s t e m f . T h e q u i c k e s t s o u r c e o f e n e r g y i s _ _ _ _ _ _ . i . s u g a r i i . f a t i i i . p r o t e i n i v . s t e m 2 . R e w r i t e t h e c o r r e c t w o r d b y c h a n g i n g t h e u n d e r l i n e d w o r d s : a . R e f i n e d o i l i s a t r a n s p a r e n t s u b s t a n c e . b . W h e a t g r a i n c a n b e s e p a r a t e d f r o m c h a f f b y s e d i m e n t a t i o n c . F r e e z i n g o f w a t e r i s a i r r e v e r s i b l e c h a n g e . d . I r o n f i l i n g s c a n b e s e p a r a t e d f r o m s a n d b y e v a p o r a t i o n . 3 . F i l l i n t h e b l a n k s w i t h a p p r o p r i a t e w o r d : a . T h e r e a r e a b o u t 1 1 7 d i f f e r e n t t y p e s o f _ _ _ _ _ _ . b . S u b s t a n c e s t h a t a r e f o r m e d a s a r e s u l t o f a c h e m i c a l r e a c t i o n a r e c a l l e d _ _ _ _ _ _ . c . T h e m a s s p e r u n i t v o l u m e o f a s u b s t a n c e i s c a l l e d _ _ _ _ _ _ . d . A / A n _ _ _ _ _ _ c o n t a i n s o n l y o n e k i n d o f a t o m s . 4 . 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 : a . S y n t h e t i c f i b r e s a r e u s e d i n m a k i n g u m b r e l l a s . b . A m e t r o r a i l c o n s u m e s f u e l , c a n r u n b u t i s n o t a l i v i n g t h i n g . c . T h e h a n d l e o f a p r e s s u r e c o o k e r i s c o v e r e d w i t h p l a s t i c . d . W e a r i n g m a n y l a y e r s o f c o t t o n w i l l k e e p u s w a r m i n w i n t e r s . e . A f o o d c h a i n a l w a y s s t a r t s w i t h g r e e n p l a n t s . f . M e l t i n g o f i c e i n t o w a t e r i s a p h y s i c a l c h a n g e . 5 . J e n n y w a s h o l d i n g a c a r d b o a r d a n d a g l a s s s h e e t i n h e r h a n d . D i f f e r e n t i a t e b e t w e e n t h e t w o o b j e c t s s h e w a s h o l d i n g o n t h e b a s i s o f t r a n s p a r e n c y . 6 . W r i t e t h e i m p o r t a n t f u n c t i o n s o f t h e f o l l o w i n g p a r t s o f a p l a n t : a . L e a v e s b . R o o t s 7 . H o w w i l l y o u s e p a r a t e i r o n f i l i n g s f r o m s a n d ? 8 . R a h u l b r o u g h t a n e w d r e s s w h i c h n e i t h e r a b s o r b s s w e a t n o r w r i n k l e s b u t h a s l u s t r e . N a m e t h e t y p e o f f a b r i c h e b o u g h t . C o m p a r e i t w i t h t h e o t h e r t y p e o f f i b r e . 9 . I f a s e e d i s p u t u p s i d e d o w n i n t h e s o i l , i n w h i c h d i r e c t i o n w i l l t h e r o o t s a n d s t e m g r o w ? 1 0 . W r i t e o n e i n g r e d i e n t o b t a i n e d f r o m a p l a n t a n d o n e f r o m t h e a n i m a l o f t h e f o l l o w i n g d i s h e s : a ) K h e e r b ) E g g c h o w M e i n 1 2 . R a h u l ’ s g r a n d m o t h e r ’ s g o l d e a r r i n g r o l l e d u n d e r t h e b e d . R a h u l s e a r c h e d f o r i t a n d f o u n d a s h i n y o b j e c t u n d e r t h e b e d a n d t o o k i t o u t . a . W h a t i s m e a n t b y a l u s t r o u s m a t e r i a l ? b . G i v e a n y t w o v a l u e s s h o w n b y R a h u l . 1 3 . W h a t a r e t h e c h a r a c t e r i s t i c f e a t u r e s o f a n h e r b ? 1 4 . D e f i n e P i s t i l . D r a w i t s w e l l - l a b e l l e d d i a g r a m . 1 5 . W h y a r e w i n d o w s m a d e f r o m g l a s s ? 1 6 . W h a t k i n d o f c h a n g e i s b u r n i n g o f t y r e ? W h y ? 1 7 . W h a t i s m e a n t b y r e s p i r a t i o n ? N a m e t h e e n d p r o d u c t s o f r e s p i r a t i o n . 1 8 . L o o k a t t h e d e l i c i o u s p i z z a . W r i t e t h e s o u r c e s o f t h e i n g r e d i e n t s m e n t i o n e d i n t h e g i v e n p i c t u r e . 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 2 8 q u e s t i o n s a n d 4 p r i n t e d p a g e s . 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 . 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 . D r a w w e l l - l a b e l l e d d i a g r a m w h e r e v e r n e c e s s a r y . 1 . C h o o s e t h e c o r r e c t a n s w e r : a . W a s t e i s r e m o v e d b y a n i m a l s b y t h e p r o c e s s o f _ _ _ _ _ _ . i . d i g e s t i o n i i . r e s p i r a t i o n i i i . e x c r e t i o n i v . i n g e s t i o n b . W h i c h o f t h e s e i s a p u r e s u b s t a n c e ? i . a i r i i . m i l k i i i . d i s t i l l e d w a t e r i v . o i l c . W h i c h o f t h e s e d o a l l l i v i n g o r g a n i s m s h a v e ? i . m u s c l e s i i . b o n e s i i i . s k i n i v . c e l l s d . F i s h e s b r e a t h e t h r o u g h _ _ _ _ _ _ . i . g i l l s i i . l u n g s i i i . n o s t r i l i v . n o s e e . T h e e d i b l e p a r t o f s u g a r c a n e i s a _ _ _ _ _ _ . i . f l o w e r i i . l e a f i i i . r o o t i v . s t e m f . T h e q u i c k e s t s o u r c e o f e n e r g y i s _ _ _ _ _ _ . i . s u g a r i i . f a t i i i . p r o t e i n i v . s t e m 2 . R e w r i t e t h e c o r r e c t w o r d b y c h a n g i n g t h e u n d e r l i n e d w o r d s : a . R e f i n e d o i l i s a t r a n s p a r e n t s u b s t a n c e . b . W h e a t g r a i n c a n b e s e p a r a t e d f r o m c h a f f b y s e d i m e n t a t i o n c . F r e e z i n g o f w a t e r i s a i r r e v e r s i b l e c h a n g e . d . I r o n f i l i n g s c a n b e s e p a r a t e d f r o m s a n d b y e v a p o r a t i o n . 3 . F i l l i n t h e b l a n k s w i t h a p p r o p r i a t e w o r d : a . T h e r e a r e a b o u t 1 1 7 d i f f e r e n t t y p e s o f _ _ _ _ _ _ . b . S u b s t a n c e s t h a t a r e f o r m e d a s a r e s u l t o f a c h e m i c a l r e a c t i o n a r e c a l l e d _ _ _ _ _ _ . c . T h e m a s s p e r u n i t v o l u m e o f a s u b s t a n c e i s c a l l e d _ _ _ _ _ _ . d . A / A n _ _ _ _ _ _ c o n t a i n s o n l y o n e k i n d o f a t o m s . 4 . 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 : a . S y n t h e t i c f i b r e s a r e u s e d i n m a k i n g u m b r e l l a s . b . A m e t r o r a i l c o n s u m e s f u e l , c a n r u n b u t i s n o t a l i v i n g t h i n g . c . T h e h a n d l e o f a p r e s s u r e c o o k e r i s c o v e r e d w i t h p l a s t i c . d . W e a r i n g m a n y l a y e r s o f c o t t o n w i l l k e e p u s w a r m i n w i n t e r s . e . A f o o d c h a i n a l w a y s s t a r t s w i t h g r e e n p l a n t s . f . M e l t i n g o f i c e i n t o w a t e r i s a p h y s i c a l c h a n g e . 5 . J e n n y w a s h o l d i n g a c a r d b o a r d a n d a g l a s s s h e e t i n h e r h a n d . D i f f e r e n t i a t e b e t w e e n t h e t w o o b j e c t s s h e w a s h o l d i n g o n t h e b a s i s o f t r a n s p a r e n c y . 6 . W r i t e t h e i m p o r t a n t f u n c t i o n s o f t h e f o l l o w i n g p a r t s o f a p l a n t : a . L e a v e s b . R o o t s 7 . H o w w i l l y o u s e p a r a t e i r o n f i l i n g s f r o m s a n d ? 8 . R a h u l b r o u g h t a n e w d r e s s w h i c h n e i t h e r a b s o r b s s w e a t n o r w r i n k l e s b u t h a s l u s t r e . N a m e t h e t y p e o f f a b r i c h e b o u g h t . C o m p a r e i t w i t h t h e o t h e r t y p e o f f i b r e . 9 . I f a s e e d i s p u t u p s i d e d o w n i n t h e s o i l , i n w h i c h d i r e c t i o n w i l l t h e r o o t s a n d s t e m g r o w ? 1 0 . W r i t e o n e i n g r e d i e n t o b t a i n e d f r o m a p l a n t a n d o n e f r o m t h e a n i m a l o f t h e f o l l o w i n g d i s h e s : a ) K h e e r b ) E g g c h o w M e i n 1 2 . R a h u l ’ s g r a n d m o t h e r ’ s g o l d e a r r i n g r o l l e d u n d e r t h e b e d . R a h u l s e a r c h e d f o r i t a n d f o u n d a s h i n y o b j e c t u n d e r t h e b e d a n d t o o k i t o u t . a . W h a t i s m e a n t b y a l u s t r o u s m a t e r i a l ? b . G i v e a n y t w o v a l u e s s h o w n b y R a h u l . 1 3 . W h a t a r e t h e c h a r a c t e r i s t i c f e a t u r e s o f a n h e r b ? 1 4 . D e f i n e P i s t i l . D r a w i t s w e l l - l a b e l l e d d i a g r a m . 1 5 . W h y a r e w i n d o w s m a d e f r o m g l a s s ? 1 6 . W h a t k i n d o f c h a n g e i s b u r n i n g o f t y r e ? W h y ? 1 7 . W h a t i s m e a n t b y r e s p i r a t i o n ? N a m e t h e e n d p r o d u c t s o f r e s p i r a t i o n . 1 8 . L o o k a t t h e d e l i c i o u s p i z z a . W r i t e t h e s o u r c e s o f t h e i n g r e d i e n t s m e n t i o n e d i n t h e g i v e n p i c t u r e . 1 9 . S o n i i s p l a y i n g w h i l e h e r m o t h e r i s c o o k i n g i n t h e k i t c h e n . S h e n o t i c e s t h e r i c e i s b u r n i n g w h i l e h e r m o t h e r i s b u s y w i t h s o m e o t h e r w o r k . S h e q u i c k l y s w i t c h e s o f f t h e g a s b u r n e r . a . W h a t k i n d o f c h a n g e i s b u r n i n g o f r i c e ? b . W h a t v a l u e s a r e s h o w n b y S o n i ? 2 0 . a . N a m e a n d d e f i n e t h e p r o c e s s f o r w h i c h t h i s d e v i c e i s u s e d . b . F o r w h i c h f i b r e G a n d h i j i u s e d t h i s d e v i c e ? c . G i v e t w o u s e s o f t h i s f i b r e o t h e r t h a n m a k i n g c l o t h e s . 2 1 . a . H o w a r e t h e t e e t h o f c a r n i v o r e s d i f f e r e n t f r o m t h o s e o f h e r b i v o r e s ? b . H o w d o p a r a s i t e s w i t h o u t t e e t h c o n s u m e t h e i r f o o d ? 2 2 . ‘ R o u g h a g e d o e s n o t p r o v i d e n u t r i e n t s y e t i t i s a n i m p o r t a n t c o m p o n e n t o f f o o d . ’ E x p l a i n . 2 3 . H o w a r e r e v e r s i b l e c h a n g e s d i f f e r e n t f r o m i r r e v e r s i b l e c h a n g e s ? S u p p o r t y o u r a n s w e r w i t h t w o e x a m p l e s o f e a c h . 2 4 . S t u d y t h e p i c t u r e g i v e n b e l o w a n d 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 : a . W h i c h m e t h o d o f s e p a r a t i o n i s s h o w n i n t h e p i c t u r e ? b . W h a t a r e t h e t w o c o n d i t i o n s n e c e s s a r y f o r i t ? Page 5 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 2 8 q u e s t i o n s a n d 4 p r i n t e d p a g e s . 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 . 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 . D r a w w e l l - l a b e l l e d d i a g r a m w h e r e v e r n e c e s s a r y . 1 . C h o o s e t h e c o r r e c t a n s w e r : a . W a s t e i s r e m o v e d b y a n i m a l s b y t h e p r o c e s s o f _ _ _ _ _ _ . i . d i g e s t i o n i i . r e s p i r a t i o n i i i . e x c r e t i o n i v . i n g e s t i o n b . W h i c h o f t h e s e i s a p u r e s u b s t a n c e ? i . a i r i i . m i l k i i i . d i s t i l l e d w a t e r i v . o i l c . W h i c h o f t h e s e d o a l l l i v i n g o r g a n i s m s h a v e ? i . m u s c l e s i i . b o n e s i i i . s k i n i v . c e l l s d . F i s h e s b r e a t h e t h r o u g h _ _ _ _ _ _ . i . g i l l s i i . l u n g s i i i . n o s t r i l i v . n o s e e . T h e e d i b l e p a r t o f s u g a r c a n e i s a _ _ _ _ _ _ . i . f l o w e r i i . l e a f i i i . r o o t i v . s t e m f . T h e q u i c k e s t s o u r c e o f e n e r g y i s _ _ _ _ _ _ . i . s u g a r i i . f a t i i i . p r o t e i n i v . s t e m 2 . R e w r i t e t h e c o r r e c t w o r d b y c h a n g i n g t h e u n d e r l i n e d w o r d s : a . R e f i n e d o i l i s a t r a n s p a r e n t s u b s t a n c e . b . W h e a t g r a i n c a n b e s e p a r a t e d f r o m c h a f f b y s e d i m e n t a t i o n c . F r e e z i n g o f w a t e r i s a i r r e v e r s i b l e c h a n g e . d . I r o n f i l i n g s c a n b e s e p a r a t e d f r o m s a n d b y e v a p o r a t i o n . 3 . F i l l i n t h e b l a n k s w i t h a p p r o p r i a t e w o r d : a . T h e r e a r e a b o u t 1 1 7 d i f f e r e n t t y p e s o f _ _ _ _ _ _ . b . S u b s t a n c e s t h a t a r e f o r m e d a s a r e s u l t o f a c h e m i c a l r e a c t i o n a r e c a l l e d _ _ _ _ _ _ . c . T h e m a s s p e r u n i t v o l u m e o f a s u b s t a n c e i s c a l l e d _ _ _ _ _ _ . d . A / A n _ _ _ _ _ _ c o n t a i n s o n l y o n e k i n d o f a t o m s . 4 . 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 : a . S y n t h e t i c f i b r e s a r e u s e d i n m a k i n g u m b r e l l a s . b . A m e t r o r a i l c o n s u m e s f u e l , c a n r u n b u t i s n o t a l i v i n g t h i n g . c . T h e h a n d l e o f a p r e s s u r e c o o k e r i s c o v e r e d w i t h p l a s t i c . d . W e a r i n g m a n y l a y e r s o f c o t t o n w i l l k e e p u s w a r m i n w i n t e r s . e . A f o o d c h a i n a l w a y s s t a r t s w i t h g r e e n p l a n t s . f . M e l t i n g o f i c e i n t o w a t e r i s a p h y s i c a l c h a n g e . 5 . J e n n y w a s h o l d i n g a c a r d b o a r d a n d a g l a s s s h e e t i n h e r h a n d . D i f f e r e n t i a t e b e t w e e n t h e t w o o b j e c t s s h e w a s h o l d i n g o n t h e b a s i s o f t r a n s p a r e n c y . 6 . W r i t e t h e i m p o r t a n t f u n c t i o n s o f t h e f o l l o w i n g p a r t s o f a p l a n t : a . L e a v e s b . R o o t s 7 . H o w w i l l y o u s e p a r a t e i r o n f i l i n g s f r o m s a n d ? 8 . R a h u l b r o u g h t a n e w d r e s s w h i c h n e i t h e r a b s o r b s s w e a t n o r w r i n k l e s b u t h a s l u s t r e . N a m e t h e t y p e o f f a b r i c h e b o u g h t . C o m p a r e i t w i t h t h e o t h e r t y p e o f f i b r e . 9 . I f a s e e d i s p u t u p s i d e d o w n i n t h e s o i l , i n w h i c h d i r e c t i o n w i l l t h e r o o t s a n d s t e m g r o w ? 1 0 . W r i t e o n e i n g r e d i e n t o b t a i n e d f r o m a p l a n t a n d o n e f r o m t h e a n i m a l o f t h e f o l l o w i n g d i s h e s : a ) K h e e r b ) E g g c h o w M e i n 1 2 . R a h u l ’ s g r a n d m o t h e r ’ s g o l d e a r r i n g r o l l e d u n d e r t h e b e d . R a h u l s e a r c h e d f o r i t a n d f o u n d a s h i n y o b j e c t u n d e r t h e b e d a n d t o o k i t o u t . a . W h a t i s m e a n t b y a l u s t r o u s m a t e r i a l ? b . G i v e a n y t w o v a l u e s s h o w n b y R a h u l . 1 3 . W h a t a r e t h e c h a r a c t e r i s t i c f e a t u r e s o f a n h e r b ? 1 4 . D e f i n e P i s t i l . D r a w i t s w e l l - l a b e l l e d d i a g r a m . 1 5 . W h y a r e w i n d o w s m a d e f r o m g l a s s ? 1 6 . W h a t k i n d o f c h a n g e i s b u r n i n g o f t y r e ? W h y ? 1 7 . W h a t i s m e a n t b y r e s p i r a t i o n ? N a m e t h e e n d p r o d u c t s o f r e s p i r a t i o n . 1 8 . L o o k a t t h e d e l i c i o u s p i z z a . W r i t e t h e s o u r c e s o f t h e i n g r e d i e n t s m e n t i o n e d i n t h e g i v e n p i c t u r e . 1 9 . S o n i i s p l a y i n g w h i l e h e r m o t h e r i s c o o k i n g i n t h e k i t c h e n . S h e n o t i c e s t h e r i c e i s b u r n i n g w h i l e h e r m o t h e r i s b u s y w i t h s o m e o t h e r w o r k . S h e q u i c k l y s w i t c h e s o f f t h e g a s b u r n e r . a . W h a t k i n d o f c h a n g e i s b u r n i n g o f r i c e ? b . W h a t v a l u e s a r e s h o w n b y S o n i ? 2 0 . a . N a m e a n d d e f i n e t h e p r o c e s s f o r w h i c h t h i s d e v i c e i s u s e d . b . F o r w h i c h f i b r e G a n d h i j i u s e d t h i s d e v i c e ? c . G i v e t w o u s e s o f t h i s f i b r e o t h e r t h a n m a k i n g c l o t h e s . 2 1 . a . H o w a r e t h e t e e t h o f c a r n i v o r e s d i f f e r e n t f r o m t h o s e o f h e r b i v o r e s ? b . H o w d o p a r a s i t e s w i t h o u t t e e t h c o n s u m e t h e i r f o o d ? 2 2 . ‘ R o u g h a g e d o e s n o t p r o v i d e n u t r i e n t s y e t i t i s a n i m p o r t a n t c o m p o n e n t o f f o o d . ’ E x p l a i n . 2 3 . H o w a r e r e v e r s i b l e c h a n g e s d i f f e r e n t f r o m i r r e v e r s i b l e c h a n g e s ? S u p p o r t y o u r a n s w e r w i t h t w o e x a m p l e s o f e a c h . 2 4 . S t u d y t h e p i c t u r e g i v e n b e l o w a n d 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 : a . W h i c h m e t h o d o f s e p a r a t i o n i s s h o w n i n t h e p i c t u r e ? b . W h a t a r e t h e t w o c o n d i t i o n s n e c e s s a r y f o r i t ? 2 5 . W h y a g r o w i n g c h i l d d o e s n e e d s m o r e p r o t e i n s i n h i s / h e r d i e t t h a n a n a d u l t ? 2 6 . a . D e f i n e f i l t r a t e a n d r e s i d u e . b . W h a t t y p e o f i m p u r i t i e s a r e s e p a r a t e d b y f i l t r a t i o n ? c . D r a w a w e l l – l a b e l l e d d i a g r a m o f f i l t r a t i o n . 2 7 . T h e g u m s u n d e r t h e t e e t h o f R e e m a a p p e a r t o b e s w o l l e n . a . N a m e t h e d e f i c i e n c y d i s e a s e s h e i s s u f f e r i n g f r o m . b . W h a t i s t h e c a u s e o f t h i s d e f i c i e n c y d i s e a s e ? c . H o w c a n i t b e p r e v e n t e d ? d . N a m e t h e t w o f o o d s r i c h i n t h e n u t r i e n t r e q u i r e d t o p r e v e n t t h i s d i s e a s e . 2 8 . O b s e r v e t h e g i v e n p i c t u r e c a r e f u l l y a n d 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 : a . I d e n t i f y t h e g i v e n p i c t u r e s b y s t a t i n g t h e s c i e n t i f i c t e r m s t o t h e m . b . S t a t e o n e s i m i l a r i t y o n t h e b a s i s o f t h e f e a t u r e s o f t h e s t e m o f t h e g i v e n t w o p i c t u r e s . c . S t a t e o n e d i f f e r e n c e b e t w e e n t h e c h a r a c t e r i s t i c s o f t h e p l a n t s w i t h a s u i t a b l e e x a m p l e .Read More
FAQs on Class 6 Science: CBSE Past Year Paper - 5
| 1. What is the importance of recycling? |  |
Ans. Recycling is important because it helps conserve natural resources by reusing materials instead of extracting new ones. It also reduces pollution, saves energy, and helps in the conservation of biodiversity.
| 2. How can we reduce air pollution? | |
Ans. Air pollution can be reduced by taking measures such as using public transportation, carpooling, reducing the use of fossil fuels, promoting renewable energy sources, planting trees, and avoiding the burning of waste materials.
| 3. What are the benefits of composting? | |
Ans. Composting is beneficial as it helps in reducing waste sent to landfills, improves soil fertility, reduces the need for chemical fertilizers, retains moisture in the soil, and promotes the growth of healthy plants.
| 4. Why is it important to conserve water? | |
Ans. Water conservation is important because it helps in ensuring a sustainable supply of clean water for present and future generations. It also helps in preserving aquatic ecosystems, reducing energy consumption for water treatment, and mitigating the effects of droughts.
| 5. How does deforestation contribute to climate change? | |
Ans. Deforestation contributes to climate change because trees absorb carbon dioxide, a greenhouse gas, from the atmosphere during photosynthesis. When trees are cut down, the stored carbon is released back into the atmosphere, leading to an increase in greenhouse gases and global warming. Additionally, deforestation reduces the Earth's capacity to absorb carbon dioxide, exacerbating the effects of climate change.
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