5. The opening created in the top of volcano after a volcanic eruption is a________.
a. Crater
b. Chamber
c. Vent
d. Cone
6. Which is not the positive effect of volcano?
a. Volcanic rock and ash provide fertile land which results in a higher crop yield
b. Tourists are attracted to the volcano,which increases money to the local economy
c. Geothermal energy can be harnessed,which provides free electricity for locals.
d. Volcanic ash can cause eye,nose,lung irritation and breathing problems
7. What is the most dangerous type of earthquake?
a. P waves
b. S waves
c. Love waves
d. Rayleigh waves
8. Which of the following can I do to prepare myself in case of an earthquake?
I. Discuss with my parents the emergency escape plan of the family
II. Secure heavy furniture on the wall
III. I have a strong awareness of earthquakes and can preliminarily assess
earthquake disasters
IV.I do not have to do anything to be prepared
V. I can administer first aid to myself and others, when an earthquake strikes
a. I, II, III and IV
b. I, II, III and V
c. II, III, IV and V
d. I, III, IV, and V
9. What cause volcanic eruption?
a. The pressure in the Earth forcing the hot rock through a crack
b. An earthquake happening nearby
c. The earth getting overheated
d. Sudden movement of the ocean surface due to earthquake
10.These are volcanoes which has not erupted within historic times,but has the capacity to
become active.
a. Active Volcanoes
b. Inactive Volcanoes
c. Extinct Volcanoes
d. Volcanic Gas
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Answer:
5.A
6.D
7.C
8.B
9.A
10.C
Explanation:
5.A crater may be breached during an eruption, either by explosions or by lava, or through later erosion
6.IT CAN HARM PEOPLE'S LIVES
7.Love waves are the most dangerous of all kinds of seismic waves. They are faster than Rayleigh waves and even larger in amplitude.
9.when water underneath the surface interacts with hot magma and creates steam this can build up enough pressure to cause an explosion.
10.An extinct volcano has not had an eruption for at least 10,000 years and is not expected to erupt again in a comparable time scale of the future.
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