Name
Unit 6:
Accessor:
Date:
Project Planning
Working Plan– P3, M3,
P3 – Produce as Realistic Working Plan for the Project, including Health and Safety Risk Assessment.
M3 – Produce a Realistic Working Plan for the Project, including a Contingency Plan
Aim:
Competently and safely carry out an investigation to determine the rate of
photosynthesis, in relation to light intensity.
Hypothesis:
As the light intensity increases, the amount of oxygen bubbles produced will gradually
increase. However, after a certain amount of time, the number of bubbles produced will
be unchanged, as it remains constant. This can be a result of limiting factors. According
to the Law of Limiting Factors, the rate of reaction can be decreased depending on the
availability of the least favourable factor. In this instance, it shall be the light.
Independent Variable
The Distance (Measured in centimetres)
10, 20, 30, 40, 50.
Dependent Variable
The Amount of Oxygen Bubbles Produced Per Minute (Rate of Reaction)
Controlled Variables
The Room Temperature (Twenty-five Degrees Celsius)
The Temperature of the Water
The Canadian Pondweed (Elodea), Size and Number of Leaves
The Colour of the LED Light/The Light Source Being Utilised
The Concentration of Carbon Dioxide
The Concentration/Volume of Water
The Concentration of the Sodium Hydrogen Carbonate Solution (45cm3)
Equipment Utilised
1. Beaker (250ml)
A cylinder container with a wide mouth, and a flat base. They can be used for
holding, heating, and stirring liquids.
2. Elodea (Forty Leaves)
Used to test the effect of light intensity.
3. Distilled Water (230ml)
Removes impurities, and electrical charge from ions and molecules in water.
4. Dissecting Scissors
Scissors that are used to cut the pond weed to its desired length.
1|Page
, 5. Forceps
Used to carefully place the pond weed into the boiling tube.
6. Measuring Cylinder (50ml)
A long narrow glass cylinder is used to measure the volumes of substances.
7. LED Light
Provides light source/light intensity.
8. Thermometer
Used to measure temperature of room, and water.
9. Ruler (30cm3)
Used to measure the distance from light source.
10. Sodium Hydrogen Carbonate (45cm3)
Supplies the carbon dioxide.
11. Clicker
Used to count how much oxygen bubbles have been produced.
Risk Assessment
Hazardous Chemicals or Nature of Hazard Control Measures Taken
Objects Being Used
Low Risk. Can cause Handle with care. Be aware
1) Dissecting Scissors minor/major cuts. Can of environment and
accidently penetrate an immediate surroundings.
individual.
If an individual were to get
injured, alert the teacher
immediately, and
commence first aid.
Can break, and cause Keep it way from edges of
injury, such as minor or tables.
2) Glassware severe cuts.
If a student does become
Test Tube May spill the chemicals on injured due to the
Beaker the individual handling the glassware, they should
Pipette object. inform a teacher, who will
Measuring seek medical help
Cylinder The thermometer may immediately.
Thermometer contain mercury, which is
poisonous. Wear Personal Protective
Equipment, as they will act
as a first layer of skin,
reducing the amount of
damage on may have if
faced with these risks. This
includes lab coats, googles
and gloves.
Hazardous Chemicals or Nature of Hazard Control Measures Taken
2|Page
Unit 6:
Accessor:
Date:
Project Planning
Working Plan– P3, M3,
P3 – Produce as Realistic Working Plan for the Project, including Health and Safety Risk Assessment.
M3 – Produce a Realistic Working Plan for the Project, including a Contingency Plan
Aim:
Competently and safely carry out an investigation to determine the rate of
photosynthesis, in relation to light intensity.
Hypothesis:
As the light intensity increases, the amount of oxygen bubbles produced will gradually
increase. However, after a certain amount of time, the number of bubbles produced will
be unchanged, as it remains constant. This can be a result of limiting factors. According
to the Law of Limiting Factors, the rate of reaction can be decreased depending on the
availability of the least favourable factor. In this instance, it shall be the light.
Independent Variable
The Distance (Measured in centimetres)
10, 20, 30, 40, 50.
Dependent Variable
The Amount of Oxygen Bubbles Produced Per Minute (Rate of Reaction)
Controlled Variables
The Room Temperature (Twenty-five Degrees Celsius)
The Temperature of the Water
The Canadian Pondweed (Elodea), Size and Number of Leaves
The Colour of the LED Light/The Light Source Being Utilised
The Concentration of Carbon Dioxide
The Concentration/Volume of Water
The Concentration of the Sodium Hydrogen Carbonate Solution (45cm3)
Equipment Utilised
1. Beaker (250ml)
A cylinder container with a wide mouth, and a flat base. They can be used for
holding, heating, and stirring liquids.
2. Elodea (Forty Leaves)
Used to test the effect of light intensity.
3. Distilled Water (230ml)
Removes impurities, and electrical charge from ions and molecules in water.
4. Dissecting Scissors
Scissors that are used to cut the pond weed to its desired length.
1|Page
, 5. Forceps
Used to carefully place the pond weed into the boiling tube.
6. Measuring Cylinder (50ml)
A long narrow glass cylinder is used to measure the volumes of substances.
7. LED Light
Provides light source/light intensity.
8. Thermometer
Used to measure temperature of room, and water.
9. Ruler (30cm3)
Used to measure the distance from light source.
10. Sodium Hydrogen Carbonate (45cm3)
Supplies the carbon dioxide.
11. Clicker
Used to count how much oxygen bubbles have been produced.
Risk Assessment
Hazardous Chemicals or Nature of Hazard Control Measures Taken
Objects Being Used
Low Risk. Can cause Handle with care. Be aware
1) Dissecting Scissors minor/major cuts. Can of environment and
accidently penetrate an immediate surroundings.
individual.
If an individual were to get
injured, alert the teacher
immediately, and
commence first aid.
Can break, and cause Keep it way from edges of
injury, such as minor or tables.
2) Glassware severe cuts.
If a student does become
Test Tube May spill the chemicals on injured due to the
Beaker the individual handling the glassware, they should
Pipette object. inform a teacher, who will
Measuring seek medical help
Cylinder The thermometer may immediately.
Thermometer contain mercury, which is
poisonous. Wear Personal Protective
Equipment, as they will act
as a first layer of skin,
reducing the amount of
damage on may have if
faced with these risks. This
includes lab coats, googles
and gloves.
Hazardous Chemicals or Nature of Hazard Control Measures Taken
2|Page
