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Complete the sentence with the correct word. The professor spent months doing ..... on the effects of climate change on the local environment.

Complete the sentence with the correct word. After years of exhaustive research and countless experiments, the team finally made a significant ..... that completely revolutionized the field of biotechnology.

Complete the sentence with the correct word. The student conducted an ..... to see which plant would grow faster with more sunlight.

Complete the sentence with the correct word. The archaeologist's ..... of ancient pottery shed new light on the history of the region.

Choose the correct option. Our teacher told us to take our favourite book to school tomorrow.

Choose the correct option. The prime minister criticised for his recent actions.

Choose the correct option. When I was walking past the Wilsons’ house, their new sofa being delivered.

Choose the correct option. I think my mobilebeen stolen!

Study the information in the table. Read the statements and decide whether they are true, false or not stated. 1. Dmitry Mendeleev was born on February 8, 1834, in a small Russian province. 2. The exact number is unknown, but it is believed that he had at least 16 brothers and sisters. 3. Dmitry Mendeleev had six sons. 4. Mendeleev released the periodic table in 1869.

Read the text and choose the correct answer. Dmitry Ivanovich Mendeleev was a Russian scientist, best known for his significant contributions to the field of chemistry. Born on February 8, 1834, in Tobolsk, Siberia to a large family, his early life was filled with financial struggles. Though his father passed away when Mendeleev was young, his mother prioritized his education and guided him towards a future in the sciences. Mendeleev's career flourished while teaching at the Saint Petersburg Technological Institute and the University, where he also conducted his research. His scientific curiosity and dedication led him to investigate a fundamental question of his time: How are the elements related to each other? Like other scientists, Mendeleev understood that elements had specific atomic weights and that they could be grouped based on these weights. But he noticed something that others had not. In 1869, Mendeleev proposed an innovative “Periodic Table”, where elements were arranged not only by their atomic weight, but also their properties, and left gaps for elements that were yet to be discovered. This distinct contribution was instrumental in helping us understand the nature of the elements and how they relate to each other. He not only grouped existing elements accurately, but he was also able to predict the properties of undiscovered elements. For instance, he accurately predicted the properties of Germanium, Gallium, and Scandium before they were even discovered! Dmitry Mendeleev passed away on February 2, 1907, but his legacy persists. His valuable contributions were recognized during his lifetime, and he was awarded the Davy Medal by the Royal Society of London in 1882 for his work in establishing the Periodic Law of the elements. 1. What is Dmitry Mendeleev best known for? 2. What significant life event influenced Mendeleev's focus on the sciences? 3. What were the unique features of Mendeleev's Periodic Table presented in 1869? 4. Which of the following does NOT correctly identify the work of Mendeleev's? 5. What recognition did Mendeleev receive during his lifetime?