Question

Note: Write a detailed report of each task including names of required
material/resources, procedures, observations, and conclusion/results. All tasks are to
be performed individually and independently Parents are requested to supervise
their kids to ensure their safety
1 As we know that the leaves of plants are waterproof due to cuticle. On the
same way take some pieces of paper of leaf size and make them waterproof After
completion, put half of these paper pieces in cold water and half in hot water. Do all
the pieces of paper remains waterproof? Explain your observations and results with
justifications
(5 marks)
2 Take small but equal amounts of water and milk in two different but similar
containers. Freeze them by putting in a rengerator Now melt them in the sunshine
bol them on the same stove under the same conditions and evaporate them
completely Note their temperature and time dunng changing of their states What
similarities and differences you find while changing the states of both of the
materials Support your investigation results with time and temperature graph
(5 marks)
3 The periodic table contains a lot of information in it. With the help of that
information calculate the number neutrons present in the non-metallic elements of
the periodic table
(5 marks)
4 Take a beaker with some water and place a lighted candie in standing
position in it Now cover the candle with a test tube to cut off tar supply. For how
long does the candle keep on burning? How much water rises up in the test tube?
Why did it happen so? Explain with diagram You can perform this experiment with
utensils available at your home in case of non availability of the beaker and test tube
(5 marks)
5 Have a look for heating and cooling processes at your home Observe them
carefully to find that how the heat is being translerred in these processes Make a
chart of any five such processes along with the mechanism of heat transfer in it. For
example
Sr No Process
Heat Transfer Mechanism
1 Making of Tea Heat transfers from fire to saucepan by radiation
(5 marks)
6 Take a piece of Steel or Iron and magnetize it Check for its magnetization
Now demagnetize it and check it for its demagnetization. How did you do that?
Explain your experience with your observations Draw the diagrams necessary
(5 marks)​

Answer 1

Answer:

Find the length of the side of a square whose area is 441 m² sure I am mathmatician

Answer 2

Explanation:

तेरी लाल निकलो ले गए बाकी जो बचा काले चोर ले गए