4. Analyze:Identify Iris Chang's tone toward her topic or the various main elements of her topic. Provide examples of word choice that reflects her attitude.

leonardo was the supreme renaissance painter, scientist, inventor, and polymath. da vinci is widely regarded as one of the greatest minds the world has ever produced. he was interested in everything from music to art and science. da vinci was an immense creative force at the start of the renaissance period. amongst his many works was the immortal painting – the mona lisa.

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radioactive dating, also known as  radioisotope dating  is a process that in  estimating the approximate  age  of  rocks. these data can be analyzed from  the studies dealing with the  decay of the radioactive elements that are present in these rocks. in nature, there are a few types of materials or atoms which are quite unstable and they spontaneously decay or breakdown to form other kinds of atoms.

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the two atomic bombs dropped on japan in 1945 killed and maimed hundreds of thousands of people, and their effects are still being felt today. the uranium bomb detonated over hiroshima on 6 august 1945 had an explosive yield equal to 15,000 tonnes of tnt.