Which data table describes the Sun? Composition mostly frozen nitrogen Mass 258.9 * 1018 kg Composition mostly hydrogen and helium gas Mass 1.989 * 1030 kg Composition fine dust, metals and minerals, and volcanic rock Mass 6.4 * 1023 kg Composition central iron core surrounded by rock, similar to Earth Mass 4.9 * 1024 kg

Chapter 4). Conservation Biology has multiple origins. It draws its focus on applied, habitat and ecosystem oriented solutions from fields such as wildlife management and forestry. It is based largely on theory from biology, especially ecology and population biology. It draws its energy from the environmental movement, from people concerned about the direct effects of environmental change on their own health and well being. It has a philosophical and spiritual foundation stemming from the world's religions and from the ethical thinking of environmental philosophers. Increasingly, conservation biology also