Explain why beta radiation is considered to have a moderate penetrating power compared to alpha and gamma radiation.

Beta radiation has moderate penetrating power because beta particles (electrons) can penetrate paper and skin but are stopped by materials like aluminum. In contrast, alpha particles are stopped by paper, while gamma rays can penetrate much deeper into materials.

This question evaluates the student's ability to compare the penetrating abilities of different types of radiation. It requires an understanding of the physical properties of beta radiation and how they differ from alpha and gamma radiation, which is crucial for safety and application in nuclear physics.