Obsidian is a volcanic glass. It is produced when magma from volcanoes is cooled and solidifies rapidly, before there is time for crystals to grow. It is usually black in color. It shatters like glass and makes excellent axe and arrow heads and the main mineral in it is quartz (silica).
Bedrock is the solid rock that lies underneath the soil in broken, weathered rock. It is not found beneath anything in particular, it simply lies below the loose weathered material on the surface. Bedrock may be many different types of rock that extend for kilometers down into the earth's crust.
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I think it is Hypothesis but i am not quite sure
the scientific process in the correct order is Questions, read, literature, hypothesis, experiment, conclusions.
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hope this helps!!!!
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When water is cooled from 4°C to 0°C, its density decreases.
In describing the energy transfer of trophic levels, energy is lost as we move up from a lower level to a higher level. This is because energy is used when for example a primary consumer does body processes before it is eaten by another consumer. hence the lowest trophic level belongs to those which <span>2) has the greatest biomass</span>