Question

Particulate material that loses energy more slowly than other particles, travels farther in the air, and can be stopped by materials such as aluminum and other metals, plastic, glass, and clothing is known as: Select one: a. alpha particles. b. gamma rays. c. neutrons. d. beta particles.

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The symptoms and effects of a biological release may not be immediately visible at the scene, because of:

Select one:

a. Historical health records and family DNA

b. Time between exposures and incubation of the disease

c. Biological agent’s life cycle and geographical area

d. Mortality rate and no witnesses

Answer 1

1. Answer Option D Beta particles

Option D is correct as beta particles do indeed have the property of moving slowly in air and travels farther in air as compared to alpha particles. And the beta particles can can be stopped by materials such as aluminum and other metals, plastic, glass, and clothing.

Option A is incorrect as alpha particles do not travel far in the air or pass through thin layer of skin which is unlike the description of beta particles given in the question.

Option B is incorrect as gamma rays are energy rays that travel in the air with high speed nearky equal to speed of light. These gamma rays have high penetration power and can easily penetrate through materials such as aluminum and other metals, plastic, glass, and clothing

Option C is incorrect as neutron can travel thousands of meters in the air and have penetration power to be very low and cant even penetrate through hydrogen rich material or water or concrete

2. Answer Option B. Time between exposure and incubation of disease

Option B is correct as in case if a biological agent release the exposure is not immediately detected due to microscopic and invisible nature of the biological agents and after infection the incubation time also differs which leads to development of symptoms after longer time which from the scene. The time when the symptoms are developed it makes the infection site and agent detection difficult immediately.

Option A is incorrect as in case of biological agents and the DNA and historical helath records are irrelevant in case of immediate visibility at scene

Option C is incorrect as biological agent like cycle defers from 20 mins tonfew hours and can be detected from sampling at the site and geographical area can also be detected on testing.

Option D is incorrect as morality rate and witnesses are irrelevant as in case of biological agents the detection site and immediate visibility is not possible and if the symptoms are seen at site then detection linksncan be determined.