Photosynthesis and cellular respiration are central to understanding how energy moves through living systems. This Grade 7 Science resource focuses on energy transformations in photosynthesis and cellular respiration, helping students connect light energy, chemical energy, ATP, chloroplasts, and mitochondria.

What Students Explore

• Explain how light energy becomes chemical energy during photosynthesis.
• Describe how cells use chemical energy to produce ATP during cellular respiration.
• Connect the energy roles of chloroplasts and mitochondria across different organisms.
• Use evidence to compare energy use in active and resting tissues.

The activities move students beyond recalling vocabulary by asking them to connect organelle function with cellular energy processes and interpret evidence about changing energy use.

What the Worksheet Includes

The student practice includes multiple-choice questions, true/false questions, short-answer responses, a dialogue, matching, a cloze passage, a labeled diagram, a reading passage, and an essay. These formats give students opportunities to identify ideas, explain processes, make comparisons, interpret evidence, and communicate scientific reasoning about energy transformations.

Teacher Support

A separate Teacher Guide PDF is included with learning objectives, teaching tips, discussion questions, and common mistakes. Use these notes to introduce the lesson, guide classroom discussion, anticipate misconceptions, and support follow-up instruction.

Classroom Use

Use this Grade 7 science worksheet as guided classroom practice during a lesson on From Molecules to Organisms: Structures and Processes, as independent work after instruction, or as a review activity. The varied response formats also provide natural opportunities for discussion and written scientific explanation.

This resource is aligned to the NGSS framework named for the lesson and keeps the focus on a key biological relationship: how organisms transform and use energy through photosynthesis and cellular respiration. Students work with the roles of chloroplasts and mitochondria while applying evidence to energy use in tissues.