Task · part of 4. Classic Experiments. Do TWO

4(b). Make a cloud chamber

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This may not apply to you. You have not answered "Requirement 4: which two experiments?" yet. Answer it and this step will either settle or drop off.

Show how it can be used to see the tracks caused by radiation, and explain what is happening. Adults must handle radioactive materials and dry ice.

Warning. The requirement states: "Adults must handle radioactive materials and dry ice."

Where this step comes from

Nuclear Science Merit Badge Requirements (Merit Badge Hub, last modified 2026-02-19), Requirement 4(b) · States "Adults must handle radioactive materials and dry ice."

Notes and warnings

Where this step comes from