1.Diagram shows the result of an
investigation carried out by group of pupils to find out if water is necessary
for microorganisms to grow. They toasted a piece of bread in the toaster to dry
it and sprinkled a few drops of water on another piece. The piece of bread were
left at a dark corner of a science laboratory for four days.
À¼õ, ´Õ Á¡½Å÷ ÌØ ÑñÏ¢÷츢ÕÁ¢¸Ç¢ý ÅÇ÷ìÌ
¿£÷ §¾¨Å¡ ±ýÀ¨¾ì ¸ñ¼È¢Â §Áü¦¸¡ûÇôÀ𼠬áöÅ¢ý ÓÊ׸¨Çì ¸¡ðʸ¢ýÈÐ. ´Õ ¦Ã¡ðÊ,
¦Ã¡ðÊ Å¡ðÎõ ¸ÕŢ¢ø Å¡ð¼ôÀð¼Ð. Áü¦È¡ýÈ¢ø º¢Ä ¿£÷ ÐÇ¢¸û ¦¾Ç¢ì¸ôÀð¼É. ¦Ã¡ðÊ Ðñθû
«È¢Å¢Âø «¨È¢ø µ÷ þÕð¼¡É ã¨Ä¢ø ¨Åì¸ôÀð¼É.
Starting of investigation
¬Ã¡öÅ¢ý
¬ÃõÀ ¿¢¨Ä
|
Normal bread
«ºø
¦Ã¡ðÊ
|
Dried in toaster
Å¡ð¼ôÀð¼
¦Ã¡ðÊ
|
·
·
 Sprinkled with water
¿£÷
¦¾Ç¢ì¸ôÀ𼠦áðÊ
|
After 4 days
4
¿¡û¸ÙìÌô À¢ÈÌ
|
Two black patches
þÃñÎ
¸ÕõÒûÇ¢¸û
|
No black patch at all
¸ÕõÒûÇ¢¸û
þø¨Ä
|
Many black patches
«¾¢¸Á¡É
¸ÕõÒûÇ¢¸û
|
a)
State two information that you can obtain from diagram
À¼ò¾¢ø ¸ñ¼È¢ÂôÀð¼ þÃñÎ ¾¸Åø¸¨Çì ÌÈ¢ôÀ¢Î¸
(i)
_________________________________________
(ii)
__________________________________________
(2 marks
/2ÒûÇ¢)
b)
In this investigation, state what is:
þó¾ ¬ÃöÅ¢ø, þÅü¨Èì ÌÈ¢À¢¼×õ
i)
kept the same/ ¸ðÎôÀÎò¾ôÀð¼
Á¡È¢: ___________________________________________
ii) changed/ ¾üº¡÷Ò Á¡È¢ : __________________________________________
(2
marks /2ÒûÇ¢)
c)
What conclusion can be made from this investigation?
þó¾ ¬Ã¡öÅ¢ý þÚ¾¢Â¢ø ±Îì¸ì ÜÊ ÓÊ× ±ýÉ?
______________________________________________
2.
Table shows animals P,Q, and R and the number of egg they
laid.
«ð¼Å¨½, À¢Ã¡½¢¸û P,Q ÁüÚõ R þð¼
Ó𨼸Ǣý ±ñ½¢ì¨¸¨Âì ¸¡ðθ¢ýÈÐ
Animals/À¢Ã¡½¢¸û
|
Number of eggs
Ó𨼸Ǣý
±ñ½¢ì¨¸
|
P
|
500
|
Q
|
30
|
R
|
2
|
a) State the things is,/
À¢ýÅÕÅÉÅü¨Èì ÌÈ¢ôÀ¢Î¸,
i)
changed
/ ¾üº¡÷Ò Á¡È¢
____________________________________________
(1 marks
/1ÒûÇ¢)
ii)
measured
/ º¡÷Ò Á¡È¢
___________________________________________
(1 marks /1ÒûÇ¢)
b) Give
one reason about the number of eggs that
animal P laid
P À¢Ã¡½¢ þð¼
Ó𨼸Ǣý ±ñ½¢ì¨¸ì¸¡É
________________________________________________
(1 marks /1ÒûÇ¢)
d)
Based
on the above statement how does
animal R ensures
the survival of its young?
§Á§Ä
ÌÈ¢ôÀ¢ð¼ ÜüÈ¢ýÀÊ À¢Ã¡½¢ R
±ôÀÊ
¾ý þÉò¨¾ ¿£Î¿¢ÇÅ¨Ä ¯Ú¾¢î ¦ºö¸¢ÈÐ?
______________________________________________
______________________________________________
(1 marks /1ÒûÇ¢)
e)
What
conclusion can be made of the observation above?
þó¾ ¬ÃöÅ¢ý þÚ¾¢Â¢ø ±Îì¸ì ÜÊ ÓÊ×
±ýÉ?
______________________________________________
______________________________________________
(1 marks /1ÒûÇ¢)
3. Diagram
2, shows water in a beaker is
being heated in an investigation. The water is heated for 25 minutes and then
left to cool. The changes in the temperature
of water is recorded every 5 minutes. Table 1 shows the results.
À¼õ 2 , µ÷ ¬Ã¡öÅ¢ø ¸ÄÉ¢ÖûÇ
¿£÷ ¦ÅôÀôÀÎò¾ôÀÎŨ¾ì ¸¡ðθ¢ÈÐ. «ó¿£÷ 25 ¿¢Á¢¼í¸ÙìÌ ¦ÅôÀôÀÎò¾ôÀðÎ, À¢ÈÌ ÌǢè¼Â
Å¢¼ôÀð¼Ð. ³óÐ ¿¢Á¢¼ò¾¢üÌ ´Õ Ó¨È ¿£Ã¢ý ¦ÅôÀ¿¢¨Ä¢ø ¸¡½ôÀð¼ Á¡üÈõ ÌÈ¢ì¸ôÀð¼Ð. «ð¼Å¨½ 12 «ùšáöÅ¢ý ÓÊ׸¨Çì ¸¡ðθ¢ÈÐ.
|
|
Thermometer
¦ÅôÀÁ¡É¢
Beaker
¸Äý
|
|
Time
/ §¿Ãõ (minutes)
|
0
|
5
|
10
|
15
|
20
|
25
|
30
|
35
|
40
|
Temperature
/ ¦ÅôÀ¿¢¨Ä (C)
|
28
|
38
|
50
|
64
|
80
|
100
|
95
|
90
|
85
|
Table 1 / «ð¼Å¨½ 1
a). What is the aim of this investigation?
þùšáöÅ¢ý §¿¡ì¸õ
±ýÉ?
_________________________________________________
________________________________________________
(1mark / 1
ÒûÇ¢)
b). State two informations gathered in this
investigation.
þó¾ ¬Ã¡öÅ¢ø
§º¸Ã¢ì¸ôÀð¼ þÃñÎ ¾¸Åø¸¨Çì ÌÈ¢ôÀ¢Î¸.
I. ______________________________________
II.
_______________________________________
(2 marks / 2 ÒûÇ¢¸û)
c). Based
on your observation, write an inference about the temperature of water at the
30th minute.
¯ÉÐ ¯üÈÈ¢¾¨Ä
«ÊôÀ¨¼Â¡¸ì ¦¸¡ñÎ, 30-ÅÐ ¿¢Á¢¼ò¾¢ø ¿£Ã¢ý ¦ÅôÀ¿¢¨Ä¨Âô ÀüȢ °¸¢ò¾ø ´ýÈ¢¨É ±Øи.
_____________________________________________
____________________________________________
(1mark / 1
ÒûÇ¢)
d). Predict
what would happen to the temperature of water if the heating continues?
¿£÷ ¦¾¡¼÷óÐ
¦ÅôÀôÀÎò¾ôÀð¼¡ø, ¿£Ã¢ý ¦ÅôÀ¿¢¨Ä¨Â Óý «ÛÁ¡Éõ ¦ºö¸.
_____________________________________________
_____________________________________________
(1 mark / 1
ÒûÇ¢ )
4.
The diagram shows the apparatuses used in an
investigation.
À¼õ, º¢Ä ¦À¡Õû¸¨Çì ¦¸¡ñΧÁü ¦¸¡ûÇôÀð¼
¬öÅ¢¨Éì ¸¡ðθ¢ýÈÐ.
Table
below shows the result of the investigation.
À⧺¡¾¨É¢ý
ÓÊ׸û «ð¼Å¨½Â¢ø ÌÈ¢ì¸ôÀðÎûÇÉ.
Heating
period(minute)
¦ÅôÀôÀÎò¾ôÀð¼
§¿Ãõ (¿¢Á¢¼õ)
|
Length
of the copper wire (mm)
¦ºõÒ
¸õÀ¢Â¢ý ¿£Çõ (mm)
|
0
|
7
|
2
|
8
|
4
|
9
|
6
|
10
|
a) What is the aim of
this investigation?
þó¾ ¬Ã¡öÅ¢ý §¿¡ì¸õ ±ýÉ?
__________________________________________________
________________________________________________
(1 mark / 1
ÒûÇ¢ )
b) State the pattern
of length of the copper wire.
¦ºõÒ ¸õÀ¢Â¢ý ¿£Çò¾¢ý Á¡üȨÁ¨Åì
ÌÈ¢ôÀ¢¼×õ.
___________________________________________
( mark / 1 ÒûÇ¢
)
c) What is the
relationship between heating period and the length of the copper wire?
¦ÅôÀôÀÎò¾ôÀð¼ §¿Ãò¾¢üÌõ ¦ºõÒ ¸õÀ¢Â¢ý
¿£Çò¾¢üÌõ þ¨¼§Â ¯ûÇ ¦¾¡¼÷Ò ±ýÉ?
_____________________________________________
_____________________________________________
( 1 mark / 1 ÒûÇ¢ )
d) State the thing
that is/À¢ýÅÕÅÉÅü¨Èì ÌÈ¢ôÀ¢Î¸,
I. Change / ¾üº¡÷Ò
Á¡È¢
___________________________________________
(1 mark / 1 ÒûÇ¢
)
II.
Measured / º¡÷Ò Á¡È¢
_____________________________________________
(1 mark / 1 ÒûÇ¢ )
Prepared by
|
Checked by
|
Certified by
|
|
|
|
MS. S. SRI ARATI
(Subject Teacher)
|
Mr.P. KADIRAVAN
(Head of Science Panel)
|
MR. V.PADMANADHAN
(Headmaster)
|
