oxygen is one of the byproducts of photosynthesis. This has been explained with the help of 5E lesson plan

1. 5E MODEL LESSON PLAN
OXYGEN IS LIBERATED DURING PHOTOSYNTHESIS

2. 1. ENGAGE
CONTENT WHAT TEACHER DOES WHAT PUPIL DOES
Teacher greets the students.
Photosynthesis is process of
preparation of food by
plants.
In this process Glucose is
produced and Oxygen is
liberated
Why plants are called autotrophs? They can prepare their own food
What is photosynthesis? It is a process of preparation of food
by plants
What are the requirements for
photosynthesis?
Can you write the equation for
photosynthesis?
6Co2+ 6H2O C6H12O6+ 6O2
Which gas released during this process? Oxygen
How to show that gas is released during
photosynthesis?
How to prove that the gas released during
photosynthesis is oxygen?

3. 2. EXPLORE
An experiment is setup to show
the release of oxygen during as
bubbles by the downward
displacement of water. The
oxygen replaces water in the
inverted test tube.
Students are divided into groups of four.
Teacher nominates a leader for the group.
Teacher supplies materials to set up the
experiment
Teacher demonstrates how to set up the
apparatus
Pupil follows
Teacher asks the students to note down the
initial level of water in the test tube
Instructs the students to keep the set up in
the sunlight
Students keep their set up in
the sunlight
Students are asked to observe the release of
bubbles and note down the number of
bubbles with an interval of 3 minutes
Students observe the release of
bubbles. Students note the
number of bubbles released
during the process

4. 3. EXPLAIN
Content
During the process of
photosynthesis carbon dioxide
is utilized by the plant and
oxygen is liberated.
The release of oxygen in the
water can be seen in the form
of bubbles.
what teacher does what pupil does
Teacher asks each leader to read out their
observation
Each leader reads out the
number of bubbles released at
an interval of 3 minutes.
The initial and final level of
water in the inverted test tube.

5. 4. EXPAND
Content
Hydrilla plant was used in
this experiment because it
is an aquatic plant. It can
photosynthesize in water.
Pond water is used so that
plant gets Co2 dissolved in
water.
What teacher does
Why Hydrilla plant is used in this
experiment?
What pupil does
They can do photosynthesis
inside the water.
Why pond water is used? It is a source of carbonates
If we use distilled water in place of pond
water what happens?
Photosynthesis may not occur
because there is no dissolved Co2
If a pinch of baking soda (Sodium
bicarbonate, NaHCO3) is added to the water
in the experimental setup what change you
can notice? The number of bubbles
released will increase or decrease?
More bubbles will be released
due to increase in the rate of
photosynthesis
How can we confirm the collected gas in the
test tube as oxygen?

6. 5. EVALUATE
Content
What teacher does
The data collected by the
students and the discussion
what pupil does
Oral questions asked by the
teacher.
Questions answered by the
students throughout the session