Решение заданий Ex. 4 и Ex. 8 из учебника английского языка

Ниже представлены решения заданий из ваших учебных материалов, оформленные для удобного переписывания в тетрадь. Ex. 4. Match the terms in A with the definitions in B: 1 — b) weight: how heavy a person or thing is 2 — c) verify: to check or prove that something is true or correct 3 — a) valency: a measurement of the ability of an atom to combine with other atoms 4 — f) compound: a chemical substance that consists of two or more elements 5 — d) halogen: a chemical element belonging to a group of five that combine with metals to form salts 6 — e) alkaline: containing an alkali or consisting of an alkali 7 — h) helix: a shape formed by a long, continuously curving line 8 — g) element: a substance that consists of only one type of atom Ex. 8. Give a correct letter of the correct ending for each sentence: 1. Chancourtois arranged elements — c) on a helical curve. 2. The first step in classification of elements was taken by — b) Dobereiner. 3. The final and most important step in the development of the periodic table was made by — b) Mendeleyev. 4. The Dutch physicist van den Brock suggested that — b) the nuclear charge of an element might be equal to the ordinal number of the element in the periodic system. 5. The periodic law was accepted immediately after its proposal by Mendeleyev because — c) of his success in making predictions with its use which were afterward verified by experiment. Ex. 13. Find out which word in the text means: 1. "laugh at" — ridicule 2. "to examine something and make corrections in it" — revise 3. "mistake" — error 4. "changed in order or position" — inverted 5. "anxiety, worry" — concern 6. "importance" — significance 7. "nuclear charge" — atomic number Ex. 18. Match the Russian words in A with their equivalents in B: 1 — е) to be born — родиться 2 — а) to graduate from — окончить 3 — д) enormous amount — огромное количество 4 — б) in the order of — в порядке 5 — в) repetition of properties — повторяемость свойств 6 — г) to overcome difficulties — преодолеть трудности Ex. 21. Answer the following questions: 1. D.I. Mendeleyev was born in 1834 in Tobolsk. 2. He studied at the Pedagogical Institute in St. Petersburg and later did research in Germany. 3. One of his very important books is "Principles of Chemistry" (or "Fundamentals of Chemistry"). 4. His greatest discovery is the Periodic Law and the Periodic System of elements. 5. He was interested in coal, petroleum, iron, and steel industries. 6. The Periodic Law has preserved its value because it is a fundamental law of nature that allows scientists to predict the properties of new elements. Ex. 23. Periodic Table Elements (Examples for the table): 1. Hydrogen: Symbol \(H\), Atomic Number \(1\), Atomic Mass \(1.008\), Group \(1\), Period \(1\), Category: Non-metal. 2. Helium: Symbol \(He\), Atomic Number \(2\), Atomic Mass \(4.0026\), Group \(18\), Period \(1\), Category: Noble gas. 3. Sodium: Symbol \(Na\), Atomic Number \(11\), Atomic Mass \(22.990\), Group \(1\), Period \(3\), Category: Alkali metal. 4. Oxygen: Symbol \(O\), Atomic Number \(8\), Atomic Mass \(15.999\), Group \(16\), Period \(2\), Category: Non-metal. 5. Iron: Symbol \(Fe\), Atomic Number \(26\), Atomic Mass \(55.845\), Group \(8\), Period \(4\), Category: Transition metal. Задание 5.8. Ответьте на вопросы (по тексту "About Myself"): 1. My name is Marina Suvorova. 2. I was born on the 5th of March, 1985, in Rostov-on-Don. 3. I am fifteen years old (according to the text). 4. I live in Rostov-on-Don. 5. Yes, I have a large family. 6. There are five people in my family: father, mother, younger sister, grandmother, and me. 7. Yes, I have a younger sister. 8. My father is Igor Petrovich, he is a doctor. My mother is Lyudmila Leonidovna, she is a housewife. 9. There are four rooms in our flat: a living room, a study, a kitchen, a bathroom, and two bedrooms. 10. We have all modern conveniences: gas, hot and cold running water, electricity, and telephone. 11. My duties are to help my Mother to clean the rooms and go shopping. 12. My favourite subject is English. 13. I like to read historical novels or modern writers. 14. I like to listen to modern and classical music (Tchaikovsky). 15. Yes, I go in for sports. 16. I have not much time for sports, but I like it.