Basalt, 2 – intrusion; 3 – mantle; 4 – crystalline rock; 5 – granite; 6 – sedimentary rock.

Date: 2015-10-07; view: 826.

Fig. 9 . Composition of the Earth's crust.

1. What does the Earth consist of?

A. shells

B. beds

C. layers

D. parts

2. The globe surrounded by a gaseous envelope is called

A. hydrosphere

B. asthenosphere

C. lithosphere

D. atmosphere

3. The atmosphere consists of

A. nitrogen and carbon

B. oxygen and nitrogen

C. carbon and oxygen

D. hydrogen and oxygen

4. The ocean basin makes up approximately __________ of the Earth.

A. one third

B. three fourths

C. two thirds

D. one fourth

5. One third of the Earth's surface consists of

A. land and water

B. isles and islands

C. continents and mountains

D. continents and islands

6. Continental crust is of ___________ composition.

A. basaltic

B. granitic

C. dolomitic

D. limestone

7. Crust is composed of

A. skin

B. layer

C. shell

D. ball

8. Moho is a zone between

A. outer core and inner core

B. crust and atmosphere

C. mantle and outer core

D. crust and mantle

9. The mantle is rich in

A. iron

B. silica

C. magnesium

D. basalt

10. The asthenosphere is a

A. weak sphere

B. rigid sphere

C. ductile sphere

D. finite sphere

11. The lithosphere is divided into how many plates?

A. six

B. five

C. nine

D. seven

12. Where is the transition zone located?

A. above the upper mantle

B. above the lower mantle

C. near the lithosphere

D. above the core

13. What letter stands for the core-mantle boundary?

A. A

B. B

C. D

D. C

14. Why does the core represent 31% of the Earth's mass?

A. density

B. gravity

C. weight

D. mass

3.1.2 Read the text once more and fill in the chart with the necessary information. Then label the diagram and give an explanation what each item means.

THE EARTH

3.1.3. Using this diagram, answer the following questions as briefly as possible. Use the information from the text «The Earth» and describe the diagram.( Paul Nixon & Alferdo Bezzi “English for Geologists”)

1. Does the Moho separate the mantle and the crust?

2. Is the lithosphere topped by a relatively lightweight crust?

3. Does the crust vary in thickness?

4. Where is the crust thinnest?

5. Does the lithosphere include the uppermost part of the mantle and crust?

6. Is the asthenosphere rigid?