A 60 minute lesson in which students will investigate how plants make oxygen.
Prior to conducting the lesson, review the procedure and equipment required for the experiment.
Clear drinking glass
A green leaf from a tree or plant
This lesson contains a link to an external video. Please watch the video prior to presenting this lesson to ensure that the content is appropriate for your students.
Encourage the students to explain why living things need oxygen. Revise the importance of trees and remind the students that trees make oxygen for us to breathe.
Take the class on a walk around the school so that each student can collect a green leaf for the experiment. On returning to the classroom, provide each student with a clear cup of fresh water.
Display slide 10 and walk through the experiment procedure with the students.
After placing the leaves into the cups, find a sunny area for the students to leave their experiments.
While waiting for the experiment to take place, watch the
video on YouTube. After watching, ask the students:
Dr. Binocs Show – Photosythesis
What is oxygen?
Why do we need oxygen?
How do plants make oxygen?
As a class, discuss what might be happening to the leaf while it it is in the sun. Once an hour has passed, collect the students’ experiments.
Provide each student with a copy of the
Encourage the students to share their observations of the experiment with the class before recording these on their worksheet. Science Observations – Worksheet. Display slide 11. As a class, discuss the observations from the experiment and how it demonstrated photosynthesis in action.
Differentiation Extending Students
Encourage more confident students to share and explain their observations from the experiment.
Allow less confident students to conduct the experiment in a small group with a teacher or teacher aide.
Suggested Assessment Strategies
used strategic whole class or individual questioning
observed student participation during learning activities
recorded student progress on a checklist
annotated student work samples
collected and reviewed student work samples
facilitated whole class or peer feedback sessions
encouraged student self-reflection
administered formal assessment tasks.
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