How will you separate sand and water from their mixture?
Sand and water from their mixture can be separated by filtration, decantation or by sedimentation method.
- By using filtration method, the large particles of sand can be separated from mixture but this method is not so useful.
- By using decantation method, we separate out the pure layer of water from the insoluble sand which settle down at the bottom.
By using the sedimentation method, the sand particles settle down at the bottom when the solution left undisturbed. Then we can separate the sand from the water easily.
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Draw (a) a leaf, (b) a taproot and (c) a flower, you have studied for Table 7.3.
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Where are poles of a bar magnet located?
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List all items known to you that float on water. Check and see if they will float on an oil or kerosene.
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A magnet was brought from different directions towards a toy boat that has been floating in water in a tub. Affect observed in each case is stated in Column I. Possible reasons for the observed affects are mentioned in Column II. Match the statements given in Column I with those in Column II.
Column I Column II
Boat gets attracted towards the magnet Boat is fitted with a magnet with north pole towards its head
Boat is not affected by the magnet Boat is fitted with a magnet with south pole towards its head
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pole of the magnet is brought near its
headBoat moves away from the magnet Boat is made of magnetic material when north pole is brought near its head
Boat floats without changing its direction Boat is made up non-magnetic material
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Arrange the following lengths in their increasing magnitude:
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Tick (√) the statements that are correct.
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(b) Deficiency diseases can be prevented by eating a balanced diet. ( )
(c) Balanced diet for the body should contain a variety of food items. ( )
(d) Meat alone is sufficient to provide all nutrients to the body. ( ) - Q:-
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(a) Fats
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In which part of a flower, you are likely to find the ovary?
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