Answer:
Igneous rocks are formed from cooled magma but metamorphic rocks are formed by temperature and pressure changes inside the Earth
Explanation:
Igneous rock , formed by the cooling of magma (molten rock) inside the Earth or on the surface. ... Metamorphic rocks, formed by temperature and pressure changes inside the Earth. All three types of rock make up the Earth's lithosphere, the outermost layer.
Because with maps they knew where to go , without them they will be lost
a large planet of relatively low density consisting predominantly of hydrogen and helium, such as Jupiter, Saturn, Uranus, or Neptune.
