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प्रश्न
What is the difference between magma and lava?
What is the main difference between magma and lava?
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उत्तर
| Magma | Lava |
| Molten material moving under the earth’s crust is called magma. | When magma comes to the surface of the earth, it is known as lava. |
| Molten rock beneath the Earth’s surface. | Molten rock that has erupted onto the Earth’s surface. |
| Contains dissolved gases and crystals. | Loses most gases when it erupts. |
| Found in magma chambers. | Flows over land and cools to form solid rock. |
| Temperature is generally higher. | Slightly cooler after exposure to air. |
संबंधित प्रश्न
Explain the types of volcanoes on the basis of periodicity of eruption with examples.
What is a volcano?
Give one example of an active volcano.
What is the difference between a dormant volcano and an extinct volcano?
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. |
The forces arising from the interior of the earth:
Fill in the blank below:
The molten rock that reaches the surface of the earth is called ______.
Fill in the blank below:
A lava ___________is made up of basic lava flows solidified away from the vent.
Explain the various parts of a volcano.
Which volcano is known as the ‘lighthouse of the Mediterranean?
Name the three belts where volcanoes are found.
Indicate the world distribution of active volcanoes.
Distinguish between :
Seismology and Volcanology.
Distinguish between :
Volcanic Dust and Volcanic Ash.
Describe the effect of volcanic eruption of Karakatoa in 1883.
State two ways in which lava may come out of the earth’s crust giving an example of each type of these volcanic activities.
Give reasons for the following:
Basic lava cones are broader than Acid lava cones.
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 where magma reaches the surface through a vent or a pipe..
What are the influences of volcanoes eruption on man?
OR
What is the importance of volcanoes?
OR
Mention adverse and beneficial effects of volcanoes.
What is the following :
Fissure type of volcanoes
______ Volcano is known as light house of Mediterranean Sea.
Iceland, the most active volcanic area is located on the ______.
