Grade 11 Microscope Magnification Practice

Revision activities / Biology study practice

Learning focus: Cell Biology and Diversity. This original Grade 11 Biology exercise gives you a task, a suggested response and a follow-up challenge. It is classroom practice, not an official assessment paper.

Understand the idea

Magnification compares image size with actual size. Both measurements must use the same unit before division; a larger image is not automatically a more detailed image.

Try the activity

A cell image is 40 mm long and the actual cell is 0.08 mm long. Calculate magnification and give one difference between magnification and resolution.

Attempt your response before opening the guidance. Show the steps, textual evidence or reasons that support your answer; a final answer alone may hide a misunderstanding.

Follow-up challenge

Repeat the calculation when actual size is given as 80 micrometres. Sketch a results table with units and explain why a blurry image cannot be repaired merely by enlarging it.

Review your work

• Did you answer the question actually asked?
• Can you explain the method or evidence in your own words?
• What would you change if one condition in the task changed?

Use the suggested response to identify one correction, then attempt the task again without copying it. For an open-ended question, other well-supported answers may be reasonable. Ask your teacher to check interpretations or language forms where needed.

Continue Biology practice

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Back to the subject guide · Check available member notes and downloads

Match this activity to the learning outcomes and sequence in your school’s current Grade 11 curriculum-design collection. This activity is a focused learning example, not a complete curriculum map.