Construct an explanation for how the availability of natural resources, the occurrence of natural hazards, and changes in climate affect human activity. ESS4.2 – Use computational thinking to explain the relationships between the sustainability of natural resources and biodiversity within a system.
ESS4.3 – Design solutions for developing, managing, and utilizing energy and mineral resources based on cost benefit rations on large and small scale
ESS4.4 – Design solutions for a major global or local environmental problem based on one of Earth’s systems.

air quality

poor drinking water

and heavy polution

can lead to poor health

answerambulatory;

it is the minimum amount of material needed to sustain a fission reaction.

critical mass is the minimum amount of fissionable material that must be assembled for a sustained fission reaction to take place. although two to three neutrons are produced for every fission, not all of these neutrons are available for continuing the fission reaction. if the conditions are such that the neutrons are lost at a faster rate than they are formed by fission, the chain reaction will not be self-sustaining.   at the point where the chain reaction can become self-sustaining, this is referred to as critical mass.