7. Is your brother at… home? – No, he is at… work. He works at… big factory. He is… engineer.
8. My sister has many… books… books are in… big bookcase.
9… weather is fine today. Let's go and play in… yard.
10. There are many… children in… yard. They are playing with… ball.
11. Where is… cat? -… cat is on… sofa.
12. Where is… book? -… book is on… shelf.
13. Where are… flowers? -… flowers are in… beautiful vase.
14. Where is… vase? -… vase is on… little table near… window.
15. Open… win dow, please… weather is fine today.
16. I can see… sun in… sky. I can see… nice little bird… bird is sitting in… big tree… tree is green.
17. There is… little white cloud in… sky.
18. We have. large room.
19. There is… big sofa in… room and… little lamp on… wall over… sofa.
20. I like to sit on… sofa and read… good book.
Answer the questions.
1. What is matter?
2. What does matter occupy?
3. Where does matter exist?
4. What are things in the physical world made up of?
5. What states does matter exist in?
6. What can matter undergo?
7. How many kinds of properties are there?
8. Are chemical properties permanent?
9. What may the various changes be?
10. Is it easy to reverse a physical change?
Make the sentences of your own using the new words (10 sentences).
Find the definite and indefinite articles in the text.
Find one word, which is a little bit different in meaning from others (найдите одно слово, которое немного отличается от других по смыслу):
1) a) nothing; b) anything; c) everything;
2) a) sense; b) feeling; c) gas;
3) a) ring; b) odour; c) taste;
4) a) colour; b) green; c) table;
5) a) feet; b) arms; c) molecule.
ЛЕКЦИЯ № 7. Skeletal system
The components of the skeletal system are derived from mesenchy-mal elements that arise from mesoderm and neural crest. Mesenchy-mal cells differentiate into fibroblasts, chondroblasts, and osteoblasts, which produce connective tissue, cartilage, and bone tissue, respectively. Bone organs either develop directly in mesenchymal connective tissue (intramembranous ossification) or from preformed cartilage models (endochondral ossification). In general, the skeletal muscles differentiate from paraxial mesoderm. The splanch nic mesoderm gives rise to cardiac and smooth muscle.
The integument consists of the epidermis and its derivatives (glands, hairs, nails), and the underlying dermis. The epider mis is derived from ectoderm, whereas the dermis is formed from mesenchyme. Melanocytes, which may occur in both layers, originate from neural crest.
