What is the most penetrating kind of radiation product that can be shielded with aluminum foil? A: alpha particles
B: beta particles
C: gamma rays
D: high-energy photons

Which statement is the best summary of the model? a-a series of aerobic and anaerobic reactions take place in cells b- the sun's energy moves through trophic levels in a food chain c-light energy is converted into stored chemical energy plants.d- food molecules are broken down in the cells if living things.