SC stringlengths 1 129 ⌀ |
|---|
null |
null |
To know more about respiration in plants we should perform the |
following activities. |
Activity-3 |
Activity |
Take a handful of moong or Bengalgram seeds. |
SC |
null |
null |
null |
null |
Soak the seeds in water a day before to perform your |
experiment. Keep these soaked seeds in a cloth pouch sprouted seeds |
null |
and tie with a string tightly. Keep the cloth pouch in a |
corner of your class room. Next day collect the sprouts/ |
germinated seeds from the pouch, keep it in a glass beaker with |
lime water |
bottle/plastic bottle(around 200 ml capacity). Take a fig-17: Evolved CO2 in respiration |
null |
Free distribution by T.S. Government 2019-20 41 |
small beaker, fill three fourth with lime water. Insert it in the beaker |
carefully. Close the plastic bottle tightly. Make a similar set with |
unsprouted seeds. Keep this set undisturbed for one or two days. During |
null |
null |
null |
null |
A |
this time observe the colour of lime water in both the sets. In which set |
does the colour change faster? Why? |
null |
null |
null |
null |
AN |
Activity-4 |
Take sprouts which were prepared for above activity |
thermometer |
in a thermosflask. Remove the lid and prepare a cork |
(with thermocol, or rubber or any other material) through |
which you can bore a hole to insert a thermometer. Take |
null |
null |
null |
null |
NG |
care that the bulb of the thermometer should dip in the |
sprouts. Close the flask with this tight fitting cork. Record |
the temperature for every two hours. You are advised to |
Thermosflask |
do this for at least 24 hours. |
Make a graph by using your observations. |
Is there any increase in temperature? |
germinating seeds |
LA Does the temperature increase steadily or does it |
abruptly increase at a time of the day? |
Where does the heat come from? |
fig-18: Heat evolved during |
respiration Photosynthesis versus Respiration |
TE |
null |
Plants carry out photosynthesis, which means that they produce their |
own food from atmospheric CO2 using light energy from the sun. This |
process is a complex series of steps involving the conversion of light |
energy into chemical energy, which is then used to synthesize sugars from |
carbon dioxide. This is a process of synthesis or an anabolic process which |
occurs in the chloroplasts. |
T |
null |
null |
The equation below summarizes the photosynthetic process |
Light energy |
CO2+ H2O (CH2O) n+ O2 |
ER |
null |
null |
null |
null |
Chlorophyll Sugar |
After balancing the equation |
Light energy |
6CO2+ 12H2O C6H12O6 + 6H2O + 6O2 |
Chlorophyll Sugar |
SC |
null |
null |
null |
null |
Once produced, the sugars can then be used for the process of |
respiration to provide energy to run all life processes. |
Respiration as we know is not just the exchange of gases. It is the |
process of breakdown of complex food molecules or a catabolic process |
to produce chemical or potential energy. |
This can be summarized by the equation |
(CH2O)n+ O2 CO2+ H2O + Energy |
42 X Class Respiration - The energy releasing system |
C6H12O6 + 6O2 6CO2 + 6H2O + Energy |
Photosynthesis and respiration appear to be opposing reactions, but |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.