Read the following sentences about photosynthesis:
(i) Sunlight, carbon dioxide, chlorophyll and water are
necessary.
(ii) Oxygen is absorbed.
(iii) Leaves carry out photosynthesis.
(iv) Proteins are made during photosynthesis.
Choose the correct pair of sentences that are true to
photosynthesis
(a) (iii) and (iv) (b) (i) and (iii)(c) (ii) and (iv) (d) (i) and (iv)
Which of the following is not a correct match?
(a) Petiole : attaches leaf to stem
(b) Lamina : green flat part of leaf
(c) Margin : gives shape to the leaf
(d) Veins : transpiration
Which of the following is not the primary function of stem?
(a) Conduction of water
(b) Photosynthesis
(c) Formation of branches
(d) Bears flowers and fruits
Which of the following is the correct match between the
characteristics of stem and the category of plant?
(a) weak stem which cannot stand upright: Creeper
(b) green tender stem : Shrub
(c) thick, hard stem with branching near : Tree
the base
(d) thick, hard stem with branches high : Herb
on the plant
Which of the following combination of features would you
observe in grass?
(a) Parallel venation and fibrous root
(b) Parallel venation and tap root
(c) Reticulate venation and fibrous root
(d) Reticulate venation and tap root
It was Paheli’s birthday, her brother Simba was helping her to decorate the house for the birthday party and their parents
were also busy making other arrangements. Following were the activities going on at Paheli’s home:
(i) Simba blew balloons and put them on the wall.
(ii) Some of the balloons got burst.
(iii) Paheli cut colourful strips of paper and put them on the wall with the help of tape.
(iv) She also made some flowers by origami (paper folding) to decorate the house.
(v) Her father made dough balls.
(vi) Mother rolled the dough balls to make puries.
(vii) Mother heated oil in a pan.
(viii) Father fried the puries in hot oil.
Identify the activities at Paheli’s home as those that can be reversed and those which cannot be reversed
Paheli mixed flour and water and (i) made a dough, (ii) rolled the dough to make a chapati, (iii) baked the chapati on a pan, (iv) dried the chapati and ground it in a grinder to make powder.
Identify the changes (i) to (iv) as the changes that can be reversed or that cannot be reversed
Change of a bud into a flower is a change which cannot be reversed. Give four more such example.
A potter working on his wheel shaped a lump of clay into a pot. He then baked the pot in an oven. Do these two acts lead to the same kind of changes or different? Give your opinion and justify your answer
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