Reshma bought three identical metal bars from the market.
Out of these bars, two were magnets and one was just a
piece of iron. How will she identify which two amongst the
three could be magnets (without using any other material)?
State whether the following statements are True (T) or
False (F).
(i) A magnet can be broken into pieces to
obtain a single pole. [ ]
(ii) Similar poles of a magnet repel each other. [ ]
(iii) Iron filings mostly stick in the middle of a bar
magnet when it is brought near them. [ ]
(iv) A freely suspended bar magnet always
aligns with the north-south direction. [ ]
Fill in the blanks
(i) Unlike poles of two magnets each other,
whereas like poles each other.
(ii) The materials that are attracted towards a magnet are
called .
(iii) The needle of a magnetic compass rests along the
direction.
(iv) A magnet always has poles.
You are given a sample of a solution. How would you check
the possibility of it being an iodine solution?
Why are millets considered a healthy choice of food? Can
eating just millets suffice for the nutritional requirements
of the body? Discuss.
While using iodine in the laboratory, a few drops of iodine
fell on Mishti’s socks and a few fell on her teacher’s saree.
The drops of iodine on the saree turned blue-black while the
colour on the socks did not change. What can be a possible
reason?
In question, state whether the statement are true (T) or false (F)
A rhombus can be constructed uniquely if both diagonals are given.
What do you think of Raman’s statement, “All starches are
carbohydrates but not all carbohydrates are starches.’’
Describe the design of an activity to test your answer.
In question, state whether the statement are true (T) or false (F)
A parallelogram can be constructed uniquely if both diagonals and
the angle between them is given
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