Standard LS.6
Photosynthesis
VDOE - Revised 2003 Standards

Standard LS.6
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.

Overview / Key Concepts

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.
Energy is a basic need of all living things. Photosynthesizing organisms obtain their energy from the sun. Plants and other photosynthesizing organisms are often called producers because of their ability to produce glucose (sugar).

Photosynthesizing organisms are at the base of the energy pyramid.

Knowledge & Skills

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

identify and describe the organelles involved in the process of photosynthesis.
explain how organisms utilize the energy stored from the products of photosynthesis.

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