Question

match the relative penetrating power to the radiation type. alpha choose beta choose moderate high low gamma choose positron choose

Explanation:

Alpha - particles are relatively large and slow - moving, so they have low penetrating power. They can be stopped by a sheet of paper or the outer layer of human skin. Beta - particles are smaller and faster than alpha - particles, giving them moderate penetrating power. They can penetrate a few millimeters of aluminum. Gamma - rays are high - energy electromagnetic radiation and have high penetrating power. They can penetrate several centimeters of lead or thick concrete. Positrons are similar to beta - particles in terms of mass and charge, and they also have moderate penetrating power.

Answer:

alpha: low
beta: moderate
gamma: high
positron: moderate