| III. Form nouns from these verbs:
State, exist, solidify, perform, vaporize, condense, require, transform.
V. Read these word combinations and give equivalents to the international words:
A building block, a spherical form, a specific material, various states, a variety of forms, a physical property, a longitudinal wave, a straight line, a wave machine, a perpendicular line, the musical instrument, the longitudinal vibrations, the relative positions, the simple relations.
VI. Get ready to answer these questions:
1. May matter exist as a solid or a liquid? 2. May it exist as a gas? 3. What are the three states of matter? 4. May water exist as a solid? 5. May it exist as a gas? 6. Can water become steam? 7. Can water become ice or steam when it is hot enough? 8. Is heat a form of energy? 9. What is heat? 10. What changes does nature perform in the case of water? 11. Under what conditions does ice become water? 12. Under what conditions do clouds become rain? 13. When does rain become ice? 14. What is required for transformation of a substance from one state to another?
VII. Choose the countable nouns from the text and give the plural of these nouns.
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