Definition of Assonance. Assonance is the repetition of a vowel sound or diphthong in non-rhyming words. To qualify as assonance, the words must be close enough for the repetition of the sound to be noticeable. Assonance is a common literary technique used in poetry and prose, and is widely found in English verse.
Nevertheless, scientists have been able to determine the probable age of the Solar System and to calculate an age for the Earth by assuming that the Earth and the rest of the solid bodies in the Solar System formed at the same time and are, therefore, of the same age.
2 things scientists must measure to find the age of a rock. the amount of radioactive element in a mineral in a rock and the amount of the stable element into which the radioactive element decays. by calculating the ratio of the radioactive element to the stable element can scientists determine the age of a rock.