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.
Health Care. Health-care social workers work in general health-care settings, such as hospitals, clinics and home health agencies. They may also specialize in a field of health care, such as hospice or palliative care to assist the dying and the bereaved, or gerontological social work to help the elderly cope with the aging process.