Ranging from 0.25-10mm in length, there are typically around 10,000 per square metre of soil, rising to as many as 200,000 per square metre in some places. The 6,000 known species of these wingless arthropods can be found in all manner of habitats all over the world, from beaches and cliffs to the Antarctic and the highest mountain ranges on Earth.
Social workers provide counseling/therapy at mental health centers. There are several kinds of therapy including individual therapy, family therapy, home based family therapy, behavior therapy, or group therapy.
A Bachelor's degree is the minimum requirement for social workers, although many also have completed their Master's degree. A Mental Health or Substance Abuse Social Worker usually gets an average wage somewhere between 32000 and 48000 depending on education and tenure levels. Mental Health and Substance Abuse Social Workers can get a compensation of Forty Thousand Three Hundred dollars per annum.