Energy transfer in photosynthesis and respiration is the focus of this Grade 6 science worksheet, helping students trace how energy moves through living systems while connecting photosynthesis, cellular respiration, gas exchange, and conservation of mass.

Students examine how light energy is converted into chemical energy in chloroplasts during photosynthesis and how organisms release usable energy by breaking down organic molecules in mitochondria during respiration. The resource also connects these processes to matter cycling, conservation of mass, stomata, gas exchange, and oxygen consumption.

What Students Practise

• Explain how light energy becomes chemical energy during photosynthesis.
• Describe how organic molecules are broken down to release usable energy during respiration.
• Connect photosynthesis and respiration to cycling matter and conservation of mass.
• Interpret energy pathways using examples involving stomata, gas exchange, and oxygen consumption.

Question Formats

The worksheet combines multiple-choice questions, true-or-false statements, short-answer responses, a dialogue, matching, a cloze passage, a labeled diagram, a reading passage, and an essay. This variety gives students opportunities to recall concepts, interpret scientific information, communicate explanations, and apply vocabulary in context.

Included for Teachers

• Student worksheet: Practice and review activities focused on energy transfer in photosynthesis and respiration.
• Separate Teacher Guide PDF: Learning Objectives, Teaching Tips, Discussion Questions, and Common Mistakes to support instruction.

Classroom Use

Use this resource as guided practice during a lesson on structures and processes, independent science work, review before assessment, or a follow-up activity after teaching photosynthesis and respiration. The reading, diagram, and written-response tasks also provide opportunities for students to explain relationships between cellular structures, energy pathways, gases, and matter.

Designed around the NGSS framework and the Grade 6 topic From Molecules to Organisms: Structures and Processes, this resource gives teachers a focused way to reinforce core biology concepts without separating photosynthesis and respiration into disconnected topics.