Добавил:
Upload Опубликованный материал нарушает ваши авторские права? Сообщите нам.
Вуз: Предмет: Файл:
UNITS.doc
Скачиваний:
16
Добавлен:
10.11.2019
Размер:
16.52 Mб
Скачать

Test 5 (unit 5-Igneous Rocks)

Choose the correct item.

Read the following texts: Volcanic rocks (pg 107.), Volcanic landforms (pg.108), Volcanic products (pg.109) in the SELF-STUDY BOOKLET

1.How many forms have volcanoes?

A. two

B. three

C. four

2. Which of the following is not a volcano?

A. fissure

B. Central

C. basalt

  1. What is the typical volcanic shape?

A. high steep-shaped mound

B. cone-shaped mound

C. flat-shaped mound

  1. What is a magma chamber?

A. a place where lave forms

B. a reservoir of gas-rich rocks

C. a reservoir of gas-rich molten rock under pressure

  1. What word is used to describe how pressurized magma comes out?

A. spits out

B. spurts out

C. balloons outward

  1. What is the form of the vent on the Earth’s surface?

A. Circular

B. oval

C. cone

  1. The top of the volcano is usually

A. an inverted crater

B. an upside plate

C. an circular cone

  1. Which of the following is not a lava flow?

A. aa

B. basic

C. pahoehoe

  1. Aa has this name because:

A. cooled rocks are soft

B. cooled rocks are sharp

C. cooled rocks are hot

  1. Pahoehoe is a word taken from what language?

A. American

B. Indian

C. Hawaiian

  1. When a volcano erupts what fuses out of it?

A. pyroclastic materials

B. gases and junk

C. solid materials

  1. What is another word for fissure volcano?

A. crack

B. plateau

C. linear

  1. Pyroclastic materials include:

A. ash, pumice and tuff

B. ash, pumice and lava

C. ash, tuff and rocks

  1. What is ash?

A. anything that shoots out of the volcano

B. it is little stuff

C. it is anything that is 2 mm or less.

  1. What is the wrong conception of the term “ash“?

A. it is the same as cinder

B. it is fine in texture

C. it is something soft and fluffy

  1. What is a synonym for “pumice”?

A. cooled lava

B. volcanic glass

C. magma with holes

  1. How is tuff formed?

A. by the consolidation of ash

B. by the consolidation of pyroclastic materials

C. by the consolidation of ash and pyroclastic materials

  1. What is not the formation of igneous rocks?

A. cooled lava or magma

B. molten rocks

C. ash and pyroclastic materials

  1. How many major types of volcanic landforms are there?

A. five

B. six

C. four

  1. What is another word for “landform”?

A. edifice

B. structure

C. shape

21. The physical structure of a volcano is:

A. shape

B. edifice

C. form

22. What determines the shape of a volcano?

A. type and consistency of the magma

B. flow rate of the magma

C. temperature of the magma

23.What makes lava thick and viscous?

A. silicon

B. iron and oxygen

C. silica

24. If there is less silica, then lava is

A. thicker and viscous

B. thinner and runnier

C. thinner and viscous

25. Ash and cinder cones are:

A. lava cones

B. explosion cones

C. concave cones

26. Which of these have more silica?

A. Mafic lava

B. basaltic lava

C. Felsic lava

27. What lava forms shield volcano?

A. felsic

B. magma

C. basaltic

28. The Hawaiian Islands are composed of:

A. shield volcanoes

B. steep-sided volcanoes

C. composite cones

29. What is silica?

A. compound of oxygen and silicon

B. compound of nitrogen and silicon

C. compound of silica and iron

30. Composite volcanoes are also called:

A. concave volcanoes

B. stratovolcanoes

C. ash volcanoes

31. The composite volcano has layers of

A. ash and lava

B. lava and magma

C. lava and pyroclastic materials

32. Which of these volcanoes is the most explosive one?

A. composite

B. fissure

C. nuee ardente

33. Which of these volcanoes don’t erupt?

A. fissure

B. composite

C. shield

34. Which of the following isn’t a volcano?

A. Vesuvius

B. Kilimanjaro

C .Rockies

35. If the magma chamber empties, what happens?

A. a caldera forms

B. a volcano disappears

C. the volcano top blasts off

36. What do fissure eruptions form?

A. lava volcanoes

B. basalt plateaus

C. volcanic edifice

37. Why is nuee ardente called disasters?

A. because of its speed and erupted materials

B. because of its cloud of gas and explosion

C. because of its speed and devastating effects

38. Which of these volcanoes are the highest?

A. composite

B. shield

C. cinder

39. What type of rock is formed as a result of a volcanic eruption?

A. sedimentary

B. igneous

C. metamorphic

40. What is not a volcanic feature?

A. magma chamber

B. vent

C. reservoir of gas-molten rock

41. What are “hot-spot” volcanoes?

A. active

B. dormant

C. extinct

42. What is the best-known product of volcanic eruptions?

A. lava

B. basalt

C. silica

43. Basalt is formed by partial melting of

A. magnetite

B. olivine

C. peridotite

44. What word does not correspond to the term igneous?

A. effusive

B. volcanic

C. magmatic

45. What verb describes a volcano?

A. emit

B. erupt

C. come out

46. What is a volcano?

A. a vent through which magma and pyroclastic materials erupt.

B. pressure which relieves rocks

C.explosive eruption ejects solid fragments from the center of the Earth.

47. What is the science that studies the structure and origin of volcanoes?

A. seismology

B. volcanology

C. geology

48. What rock is not igneous?

A. rhyolite

B. obsidian

C. shale

49. What does the term pahoehoe mean?

A. sausage-like

B. ropy

C. lumpy

50. Where is Mt. Helen?

A. Washington State

B. Oregon

C. Califorina

Соседние файлы в предмете [НЕСОРТИРОВАННОЕ]