Advertisements
Advertisements
Question
State two ways in which lava may come out of the earth’s crust giving an example of each type of these volcanic activities.
Solution
Two main types of volcanic eruptions are :
- Explosive and
- Quiet or Hawaiian.
- The Explosive eruption is the most violent and destructive Explosion of pent up gases mainly steam cause enormous quantities of magma to be thrown into the air to form great clouds. Example Krakatoa volcano in Sunda Strait in Indonesia erupted in 1883.
- The Quiet eruption cause and other gases to escape. There is no violent explosion. Lava flows the creators and flows down the sides of the cone.
Example: Hawaiian volcano and Mauna Loa.
APPEARS IN
RELATED QUESTIONS
Fill in the blanks with suitable words:
Volcanic activity is a ______ movement.
What is a volcano?
What is the difference between dormant volcano and an extinct volcano?
Name two types of landforms made by volcanoes.
What is called the Pacific Ring of Fire? Why is it called so?
Name the three types of volcanoes on the basis of the frequency of their eruption.
Match the Following:
| Column A | Column B |
| 1. Vent | (a) An active volcano |
| 2. Extinct | (b) Hot water fountain |
| 3. Geyser | (c) Dead Volcano |
| 4. Mt. Stromboli | (d) An opening in the earth's crust through which lava flows. |
| 5. Cinder Cone | (e) A volcanic landform. |
Fill in the blank below:
The Circum-Paciflc Belt is also called ____________.
Explain the various parts of a volcano.
Name the largest active volcano in the world.
Name the three belts where volcanoes are found.
Name a well known geyser.
What is the following:
‘Ring of Fire’
Give reasons for the following:
The Circum-Pacific Belt of volcanoes is called ‘The Ring of Fire’.
Give one word for the following :
The funnel shaped hollow at the top of a volcanic cone.
Give one word for the following :
A large sill of acid lava which has solidified gradually giving a dome-like shape.
Give one word for the following :
A volcano whose eruption buried and destroyed two Roman towns.
Which type of lavas weather into more fertile soil. Name also one useful feature of volcanicity other than soil fertility.
Which four of the following words are connected with volcanic activity:
Karst, crater, drumlin, stalactite, gully, potholesl, ash, basalt, swallow, holes, dyke, domes, bluffs.
What is the following :
Spine or plug
What is the following :
Epicentre
Choose the odd one
Answer in a word
Give an example of extinct volcano.
Distinguish between Active volcano and dormant volcano
Describe the classification of volcanoes based on the eruptions.
Choose the odd one.
Stromboli, Helens, Hawaii, Fujiyama
