Assignments

1. Answer the following questions:

1. What is the structure of the earth?

2. What are the two types of rocks the crust of the earth contains?

3. What is sial?

4. What is sima?

5. What is intrusive rock?

6. What is extrusive rock?

7. Why are igneous rocks important?

2. Find in the text the English equivalents for the Russian words and expressions. Reproduce the contexts in which they are used.

Ядро, слой, пена, кора земли, мантия, остывать, пузыриться, пемза, волдырь, изрыгать.

3. Match the terms on the left with their definitions on the right. Use them in sentences of your own:

Igneous	Forced out in a molten state through the crust
Mantle	Liquid or molten rock deep in the earth which on cooling solidifies
Extrusive	Layer of the earth's interior between the core and the crust
Magma	Heavy igneous rock material of the inner crust forming the ocean floors
Sima	The light granitic rock material near the surface of the crust, underlying the continents
Intrusion	Formed by volcanic action or intense heat
Sial	The invasion of liquid magma into or between solid rock

4. Fill in the gaps with the words and expressions from the text.

1. Igneous rocks are those which were formed from ____ or ____ materials.

2. Igneous rocks were once ____, a hot ____ inside he earth.

3. The very core of the earth is probably ____ alloyed with ____ and ____.

4. Surrounding the core of the ____ is ____.

5. The ____ of the earth contains two types of ____.

6. The ____ are supported by the ____ sial.

7. Sial rocks are ____ in color and ____.

8. Lying underneath the sial is ____.

9. The word “sima” is ____ for ____ and ____.

10. Inside the crust ____ may flow into breaking ____ forming ____.

11. ____ rock forced between ____, will raise the upper layer like a ____.

12. The rock is called ____ because it is pushed out into ____.

13. The cooling of intrusive rock is ____, of ____ rock - ____.

14. Igneous rocks are ____ because of the rich ____ ____ in them.

15. Igneous rocks offer ____ that the earth is still ____, ____, and ____ its mountains.

5. Work in teams and write down false statements based on the text (no fewer than 6 statements). Present them in class. Use the information from the text to refute (опровергнуть) the other team’s false statements.

6. Speak on the following topics:

1. The structure of the earth (core, mantle, crust)

2. The structure of the crust (sial, sima)

3. Magma forming intrusive rocks

4. Magma forming extrusive rocks

7. Find 9 geological terms.

S	T	E	R	S	I	A
U	M	A	G	M	A	L
L	S	I	P	U	M	I
N	T	M	I	C	A	C
I	R	A	L	C	R	E
9	U	S	I	O	O	C
E	V	I	S	R	E	K