The process of deciding how and to what extent to reduce or eliminate risk factors by considering the risk assessment, engineering factors (Can procedures or equipment do the job, for how long and how well?), social, economic and political concerns.

A highly contagious viral disease, spread through contact with discharges from the nose and throat of an infected person

Saguaro National Park, located in Tucson, Southern Arizona, is part of the United States National Park System.

A scalar quantity is one which has magnitude but no direction.

 A quantity, such as mass, length, or speed, that is completely specified by its magnitude and has no direction

Simple Harmonic Motion (SHM) is defined as the oscillatory motion of a particle whose acceleration a is always directed towards a fixed point and is directly proportional to its displacement x from that fixed point but in the opposite direction to the displacement.

A line graph that shows the general shape of the relationship between two variables. It will not have any points plotted and although the axes should be labelled they may not be scaled.

Soil pollution is caused by the presence of  human-made chemicals or other alteration in the natural soil environment.

Non-liquid, non-gaseous category of waste from non-toxic household and commercial sources.

The largest group of organisms where two hybrids are capable of reproducing fertile offspring, typically using sexual reproduction.

The rate of change of distance with respect to time.

The chemical compound with the formula SO2. At standard atmosphere, it is a toxic gas with a pungent, irritating, and rotten smell

These are the equations of motion for a body undergoing constant acceleration





where..
s = distance (metres, m)
u = initial velocity (metres per second, ms^-1)
v = final velocity (metres per second, ms^-1)
a = acceleration (metres per second squared, ms^-2)
t = time (seconds, s)

A special type of interaction between species. Sometimes beneficial, sometimes harmful, these relationships are essential to many organisms and ecosystems, and they provide a balance that can only be achieved by working together

 Junction between two nerve cells, consisting of a minute gap across which impulses pass by diffusion of a neurotransmitter.

The application of science, especially to industrial or commercial objectives

The VLA is  a radio astronomy observatory located on the Plains of San Agustin, between the towns of Magdalena and Datil, some 50 miles (80 km) west of Socorro, New Mexico.

Threatened species are any species which are vulnerable to endangerment in the near future.

The torque of a couple is the product of one of the forces with the perpendicular separation between the couple.

Describes something that can be poisonous or deadly if it is eaten touched, or inhaled in large enough amounts.

The quality or degree of being poisonous or harmful to plant or animal life.

A poisonous substance, especially a protein, that is produced by living cells or organisms and is capable of causing disease when introduced into the body tissues but is often also capable of inducing neutralizing antibodies or antitoxins

This is the value that would be obtained in an ideal measurement.

The interval within which the true value can be expected to lie, with a given level of confidence or probability, eg “the speed is 20 m/s ± 1 m/s , at a level of confidence of 90 %.

It is the upward force acting on an object that is partially or fully immersed in a fluid.

Companies (usually power distributors) permitted to provide important public services (such as energy or water) to a region.

A conclusion supported by valid data, obtained from an appropriate experimental design and based on sound reasoning.

Suitability of the investigative procedure to answer the question being asked. For example, an investigation to find out if the acceleration of an object depended upon the mass of the object would not be a valid procedure if the applied force was not controlled.

These are physical, chemical or biological quantities or characteristics.