Print

 

 

 

Download ModelDownload Sourceembed

Translations

Code Language Translator Run

Software Requirements

SoftwareRequirements


Android iOS Windows MacOS
with best with Chrome Chrome Chrome Chrome
support full-screen? Yes. Chrome/Opera No. Firefox/ Samsung Internet Not yet Yes Yes
cannot work on some mobile browser that don't understand JavaScript such as.....
cannot work on Internet Explorer 9 and below

 

Credits

This email address is being protected from spambots. You need JavaScript enabled to view it.; Francisco Esquembre; Flix J. Garca Clemente

end faq

Sample Learning Goals

Bubbles are given off by the plant through Photosynthesis. By measuring the rate at which the bubbles are produced it is possible to tell how fast the plant is photosyntheising (measuring amount of oxygen bubbles produced per minute).

Expt 1:light intensity affects the rate of photosynthesis

Expt 2: percentage of dissolved Carbon Dioxide in water affects rate of photosynthesis

Plants need energy to carry out important life processes like growing. Unlike animals, they do not hunt for food or eat. Instead, plants make their own food through a process called Photosynthesis. Photosynthesis takes place in the leaves of the plant.

To make food by photosynthesis, plants need water and carbon dioxide as raw materials to make food. Plants also need chlorophyll to trap light energy. the light energy is then used to combine water and carbon dioxide to produce sugar. Oxygen is also released during photosynthesis.

                                           chlorophyll

Water + Carbon Dioxide ------------------> Sugar (Glucose) + Oxygen 

                                             light

                                         chlorophyll

6 CO2 + 12 H20            ------------------>  C6H12O6 + 6 O2 + 6 H2O

                                             light

Photosynthesis occurs in two stages: light-dependent stage and light-independent stage

light-dependent stage:

Light energy is absorbed by chlorophyll and converted to chemical energy. 

Light energy is required to split water molecules into oxygen and hydrogen. (i.e. photolysis of water)

 

 

in summary, 

 

Activity 1 light intensity affects the rate of photosynthesis

For Teachers

Investigate how light intensity affects the rate of photosynthesis

Investigate how percentage of dissolved Carbon Dioxide in water affects rate of photosynthesis

Factors Affecting Photosynthesis JavaScript HTML5 Applet Simulation Model

investigate intensity of light vs number of oxygen bubbles

http://iwant2study.org/ospsg/index.php/573

Plotting the Graph

Instructions

Questions

  1. Describe the graph between 0 and 4 units of light intensity.

______________________________________________________________

  1. What does this tell you about the relationship between light intensity and the rate of photosynthesis between 0 and 4 units of light intensity?

______________________________________________________________

______________________________________________________________

  1. What does this tell you about the relationship between light intensity and the rate of photosynthesis when the light intensity is more than 4 units?

______________________________________________________________

______________________________________________________________

  1. It is usually difficult to get accurate readings when this experiment is carried out in a school laboratory. Give one reason why this is so.

______________________________________________________________

______________________________________________________________

  1. Suggest one way to overcome the difficulty that you have stated above.

______________________________________________________________

______________________________________________________________

Activity 2 percentage of dissolved Carbon Dioxide in water affects rate of photosynthesis

Photosynthesis JavaScript HTML5 Applet Simulation Model
investigate percentage of dissolved carbon dioxide vs number of oxygen bubbles
http://iwant2study.org/ospsg/index.php/573

Getting Started

Instructions

Questions

  1. What do you observe at the plant?

______________________________________________________________

  1. What is the gas that is given out?

______________________________________________________________

  1. What does the amount of gas given out tell you about the rate of photosynthesis for plant?

______________________________________________________________

______________________________________________________________

  1. What is the variable in this experiment? 

______________________________________________________________

Investigating

Instructions

Percentage of Carbon Dioxide dissolved in the water / %
Number of Bubbles given out by 
the plant after 1 minute
0.00 0
0.05
0.10
0.15
0.20
0.25
0.30

 

Plotting the Graph

Instructions

 

Questions

  1. Describe the graph between 0% and 0.15% of carbon dioxide.

______________________________________________________________

  1. Between 0% and 0.15% of carbon dioxide, what can you tell about the relationship between carbon dioxide concentration and rate of photosynthesis?

______________________________________________________________

______________________________________________________________

  1. Describe what happens to the graph after 0.15% carbon dioxide.

    ______________________________________________________________

______________________________________________________________

  1. What does this tell you about the relationship between the carbon dioxide concentration and rate of photosynthesis when carbon dioxide concentration exceeds 0.15%?

______________________________________________________________

______________________________________________________________

Video

  1. Real Setup   Video demo - Photosynthesis and respiration with Cabomba pondweed by Science and Plants for Schools
  2. Hands-on Demo  Photosynthesis Lab Walkthrough by Bozeman Science
  3. Explanation walk through   IGCSE 2.10. Rate limiting factors in photosynthesis. Ms Cooper by Ms Cooper's IGCSE Biology
  4. https://www.youtube.com/watch?v=hITp-60mqzg Effect of a Varying Light Intensity on Rate of Photosynthesis-Updated by Biology Bugbears

 Version:

  1. http://weelookang.blogspot.sg/2017/11/photosynthesis-javascript-html5-applet.html

Other Resources

  1. https://www.reading.ac.uk/virtualexperiments/ves/preloader-photosynthesis-full.html
  2. https://ggbm.at/sAhqyWrS  by Vincent lew
  3. https://www.globalcitizen.org/en/content/bionic-leaf-turn-sunlight-into-fuel/
  4. https://www.geogebra.org/m/sAhqyWrS 

 

end faq

4.9 1 1 1 1 1 1 1 1 1 1 Rating 4.90 (5 Votes)
Parent Category: Interactive Resources
Category: Biology
Hits: 15219