What additional information is obtained from measurements on an ordinal scale compared to measurements on a nominal scale? comparison of the magnitudes of two measurements (such as one being twice as large as the other) direction of difference (greater or less) between two measurements magnitude of difference between two measurements

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.