Vocabulary

7. Заповніть пропуски потрібними словами:.

properties, alteration, occur, comprise, quantity, bond, join, particle, unique, reaction, solution, equilibrium

1. All the chemical elements differ by their physical and chemical

2. The ... of mercury with water may lead to very negative conse­quences.

3. Natural ... was destroyed because of government experiments with ecosystems.

4. This specimen is ..., I have never seen anything like this.

5. Two these elements have ionic ..., that is why they together form a very stable complex substance.

6. Be very careful when you work with ... of hydrochloric acid, you can burn yourself.

7. When different elements bind together, they undergo chemical ....

8. The science of chemistry ... many different but nonetheless very important fields.

9. When a pharmacist is preparing a drug, he must think not only of ..., but of quality too.

10. As a result, many subsequent changes may ... .

8. Поставте там, де необхідно прийменник.

1. Chemistry is the study ... matter and its changes.

2. All the matter is composed ... fundamental units called atoms.

3. The science ... chemistry is important ... improving the standards ... living.

4. The nucleus ... the atom is composed ... two particles called pro­tons and neutrons.

5. Chemistry provides employment... a large variety ... people.

6. The simplification ... chemical problems is made ... classifying matter.

7. The behavior ... the four forms ... matter can be explained ... the fact that all matter consists ... particles ... motion.

8. The universe is made ... more than 90 elements.

9. Chemistry involves ... the study ... chemical elements and how they combine.

9. Замініть підкреслені слова синонімами:

liquid, combine, agriculture, carbohydrate, energy, tools, field, applica­tion

1. The condition of the patient is getting better and in a few days he will continue his farming activities.

2. This reaction can be performed only if we add manganese to water and then try to make a new substance.

3. There are a lot of different professions you can try in your life for your profit.

4. The Chernobyl accident put all the people of the Earth in danger.

5. The scientists have discovered a new and safe method of making proteins into, sugars.

6. This unbelievable but real fact is not only proved scientifically but also used in practice.

7. This watery substance is very poisonous.

10. Дайте відповіді на запитання.

1. What is chemistry?

2. What do chemists study?

3. What are chemical changes?

4. What is the difference between chemical and physical changes?

5. How do chemical elements differ from each other?

6. How many elements are there on the Earth: natural and artifi­cially synthesized?

7. What is analytical chemistry? Why is it important to study quanti­tative and qualitative analysis?

8. What professions is biochemistry especially important for?

9. What tools are used in colloid chemistry?

10. What is the difference between organic, inorganic chemistry and biochemistry?