Science - 2018-19

LS.5 - Photosynthesis

The student will investigate and understand the basic physical and chemical processes of photosynthesis and its importance to plant and animal life. Key concepts include

a) energy transfer between sunlight and chlorophyll;

b) transformation of water and carbon dioxide into sugar and oxygen; and

c) photosynthesis as the foundation of virtually all food webs.

Bloom's Levels:  Analyze; Understand

Adopted: 2010


  • Living organisms acquire the energy they need for life process through various metabolic pathways, such as photosynthesis.

  • I can grow plants in the correct location and arrangement to produce the best fruit.
  • I can explain why people need plants to live.


  • Chlorophyll is a chemical in chloroplasts that can absorb or trap light energy.
  • Photosynthesis is the necessary life process that transforms light energy into chemical energy. It involves a series of chemical reactions in which the light energy is used to change raw materials (carbon dioxide and water) into products (sugar and oxygen). The energy is stored in the chemical bonds of the glucose (sugar) molecules.
  • Plants perform cellular respiration as well as photosynthesis.
  • Plants convert the sugars they produce into other raw materials that are used by plants and animals for growth, repair, and energy needs.
  • Energy is a basic need of all living things. Photosynthesizing organisms obtain their energy from the sun and are often called producers because of their ability to produce glucose (sugar).
  • Photosynthesizing organisms are the foundation of virtually all food webs.  


In order to meet this standard, it is expected that students will

a)  describe the process of photosynthesis in terms of raw materials and products generated.

b)  identify and describe the cellular organelles involved in the process of photosynthesis.

explain how organisms utilize the energy stored from the products of photosynthesis.

compare and contrast the processes of photosynthesis and cellular respiration.

c)  relate the importance of photosynthesis to the role of producers as the foundation of food webs.

a, b, c)  design an investigation from a testable question related to photosynthesis. The investigation may be a complete experimental design or may focus on systematic observation, description, measurement, and/or data collection and analysis. 


chlorophyll, photosynthesis, carbon dioxide, water, glucose, sugar, oxygen, chloroplast, producers, sunlight, leaf, cellular respiration, mitochondria

Updated: Jun 29, 2018