What are all the ways that a substance can change phase?

What approach is required to balance the objectives of sustainable development? balancing the objectives of sustainable development requires a(n) .

Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils

What does the symbol (–hfus) indicate in a phase change?