Page 9 - Chapter 07
P. 9
Materials Part 2: Investigation of the necessity of sunlight
Required
A potted plant with healthy leaves, black paper, paper clips, beaker, forceps, test tube,
ethanol, iodine solution, dropper, burner
Procedure
ΠDe-starch the potted plant by placing it in a dark place for about 2-3
days.
Wrap a “leafA” with black paper as shown in diagram.
Ž Cut out a certain pattern on another black paper and wrap “leaf B” with
this black paper as shown in diagram (use paper clips to hold the black
paper in place).
A
Black paper B Black paper
strip with a strip
cut design
Leaves attached
E with plant
Clip to hold
paper
Figure 7.3.3: Experiment setup to investigate the necessity
of light in photosynthesis
Place the plant in strong sunlight for BRAIN TEASERS
4-6 hours.
• Why is it needed to de-
Remove both leaves from the plant starch the plant?
and apply starch test on them.
• What is the purpose of
‘ Apply starch test to both of the covering the leaf with
leaves. black paper?
82
Required
A potted plant with healthy leaves, black paper, paper clips, beaker, forceps, test tube,
ethanol, iodine solution, dropper, burner
Procedure
ΠDe-starch the potted plant by placing it in a dark place for about 2-3
days.
Wrap a “leafA” with black paper as shown in diagram.
Ž Cut out a certain pattern on another black paper and wrap “leaf B” with
this black paper as shown in diagram (use paper clips to hold the black
paper in place).
A
Black paper B Black paper
strip with a strip
cut design
Leaves attached
E with plant
Clip to hold
paper
Figure 7.3.3: Experiment setup to investigate the necessity
of light in photosynthesis
Place the plant in strong sunlight for BRAIN TEASERS
4-6 hours.
• Why is it needed to de-
Remove both leaves from the plant starch the plant?
and apply starch test on them.
• What is the purpose of
‘ Apply starch test to both of the covering the leaf with
leaves. black paper?
82
