A compound is formed when two substances are chemically combined. H2O, or water, is a compound as it is composed of 2 hydrogen atoms and 1 oxygen atoms.
When you need heat to make reaction happen it is endothermic.
If heat was on the right side then type of reaction would be exothermic.
<span>Definition of Metallurgy-The branch of science and technology concerned with the properties of metals and their production and purification.</span>
Answer:
Igneous=B
Sedimentary=C
Metamorphic=A
Weathering is when=B
If sedimentary rock.....=C
