English National Curriculum - Science

Investigating the rate of photosynthesis

Mission Objectives

Describe a method to measure the effects of one limiting factor on the rate of photosynthesis

Identify independent, dependent and control variables in a practical investigation

Evaluate the reliability of results and suggest improvements to the method

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Keywords

Words and meanings to learn

rate

the amount of product formed per unit time; for example, the volume of oxygen produced per minute during photosynthesis

hypothesis

a testable prediction about what will happen in an experiment, based on scientific knowledge and observations

repeatability

the extent to which similar results are obtained when the same experiment is repeated using the same method and equipment

light intensity

the amount of light energy reaching a plant, which affects how fast photosynthesis can take place

reproducibility

the extent to which similar results are obtained when an experiment is repeated by different people or using different equipment or methods

This lesson has been written by

Samantha Batch

Samantha is an accomplished science educator whose current work centres on curriculum design and professional development, supporting teachers to deliver high-quality science education through evidence-informed approaches. She is a former Head of Chemistry and Sixth Form Tutor with extensive Key Stage 4 and 5 experience, and has worked as an AQA examiner, giving her valuable insight into assessment standards and what students need to succeed.

Samantha has written the complete KS4 Science curriculum, fully aligned with the AQA GCSE Science: Trilogy specification. Covering biology, chemistry and physics, the curriculum is carefully sequenced so that students build knowledge cumulatively and see clear connections between concepts across the three sciences. Drawing on her experience as an examiner and on research into effective teaching, she has designed it to embed retrieval practice, clear explanation, worked examples and the required practicals throughout, preparing students for the demands of the GCSE exams. Grounded in the realities of the classroom, the curriculum is rigorous for students and manageable for busy teachers.

In her spare time, Samantha enjoys playing the accordion with her local orchestra and has recently taken up cricket. 

Sarah Mintey MBE

Sarah is a former headteacher and charity CEO who founded Developing Experts in October 2015 with the goal to create a fit-for-purpose curriculum for schools. The company has created a science curriculum for children ages 4-16 which is delivered through sequenced lessons mapped against the National Curriculum in biology, chemistry, and physics. Developing Expert's innovative approach to learning has already been road-tested and voted 'best EdTech product in Europe', winning Tech Nation’s Rising Stars earlier in 2019 and a place on Google for Startups Immersion program 2020. In 2022 Developing Experts won the BETT Awards for Best Classroom Resource - Teaching Aid. Sarah is a 'LDC Top 50 Most Ambitious Business Leader' 2022. In October 2022 Developing Experts joined Tech Nation's Upscale 8.0 programme.

Sarah is delighted to be working with over 6500 UK schools and clients such as the Royal Horticulture Society, Network Rail, Rolls Royce, BEIS, National Nuclear Labs, Anglian Water and the Ministry of Defence.

Sarah was awarded an MBE for her services to tech and education in 2020. 

Required Resources

  • a beaker
  • filter funnel
  • a 1 cm3 or 10 cm3 measuring cylinder
  • freshly cut 10 cm piece of pondweed
  • a light source
  • a metre rule
  • a stopwatch
  • a beaker of water (heat shield)
  • handouts

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