Page 14 - Chapter 07
P. 14
Experiment To demonstrate the process of respiration
in germinating seeds by using lime water
7.4
Date ________________
During germination, seeds perform respiration for energy. Carbon dioxide is
Background releases as a waste product during respiration. Lime water turns milky when it
Information comes in contact with CO2.
Materials Conical flask, test tubes, one hole cork, germinating pea seeds, U shaped glass tube,
Required lime water, wax, beaker
Procedure ΠTake some germinating seeds and put them
in conical flask. ! CAUTIONS
Place a cork with a hole in its centre on the • Don't use seeds
mouth of the flask. which have been
Ž Insert one end of U-shaped glass tube into soaked for a long
the hole of cork and seal it with wax. time.
Dip the other end of the U-shaped tube into
the lime water of the beaker.
Mark this apparatus as 'A'.
‘ Name other seeds which
As a control, set the same apparatus with we can use for this
non-germinating seeds as control. Mark it as experiment?
B.
’ Leave the both apparatus for 24 hours.
U-shaped tube
Cork
Germinating Lime
seeds water
Figure 7.4.1: Experiment setup to demonstrate respiration in germinating seeds
87
in germinating seeds by using lime water
7.4
Date ________________
During germination, seeds perform respiration for energy. Carbon dioxide is
Background releases as a waste product during respiration. Lime water turns milky when it
Information comes in contact with CO2.
Materials Conical flask, test tubes, one hole cork, germinating pea seeds, U shaped glass tube,
Required lime water, wax, beaker
Procedure ΠTake some germinating seeds and put them
in conical flask. ! CAUTIONS
Place a cork with a hole in its centre on the • Don't use seeds
mouth of the flask. which have been
Ž Insert one end of U-shaped glass tube into soaked for a long
the hole of cork and seal it with wax. time.
Dip the other end of the U-shaped tube into
the lime water of the beaker.
Mark this apparatus as 'A'.
‘ Name other seeds which
As a control, set the same apparatus with we can use for this
non-germinating seeds as control. Mark it as experiment?
B.
’ Leave the both apparatus for 24 hours.
U-shaped tube
Cork
Germinating Lime
seeds water
Figure 7.4.1: Experiment setup to demonstrate respiration in germinating seeds
87
