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.
How do scientists know the age of fossils? Scientists have developed more than a dozen methods for determining the age of fossils, human artifacts, and the sediments in which such evidence is found. These methods can date objects millions of years old. Whatâs more, the methods can be tested against one another to provide a highly reliable record of the past.