How do you describe a volcano for kids?
A volcano is a landform (usually a mountain) where molten rock erupts through the surface of the planet. In simple terms a volcano is a mountain that opens downward to a pool of molten rock (magma) below the surface of the earth. It is a hole in the Earth from which molten rock and gas erupt.
How would you describe a stratovolcano?
Stratovolcanoes, also known as composite volcanoes, are conical volcanoes composed of multiple layers of intermediate to felsic lava, ash, and other volcanic debris.
What is a non explosive volcano?
Nonexplosive eruptions are the most common type of volcanic eruptions. These eruptions produce relatively calm flows of lava in huge amounts. B. Vast areas of the Earth’s surface, including much of the sea floor and the Northwestern United States, are covered with lava form nonexplosive eruptions.
How would you describe an erupting volcano?
Definition: A volcanic eruption occurs when magma is released from a volcano. Volcanic eruptions can be quite calm and effusive, or they can be explosive. Effusive eruptions produce lava flows, while explosive eruptions produce ash and pyroclastic density currents.
What words describe volcanoes?
Volcanos – thesaurus
- active. adjective. an active volcano is likely to erupt (=explode and pour out fire) at any time.
- crater. noun. the round hole at the top of a volcano.
- dormant. adjective.
- erupt. verb.
- extinct. adjective.
- inactive. adjective.
- lava. noun.
- lava. noun.
What is a volcano description?
A volcano is a mountain that opens downward to a pool of molten rock below the surface of the earth. When pressure builds up, eruptions occur. In an eruption, gases and rock shoot up through the opening and spill over or fill the air with lava fragments. The danger area around a volcano covers about a 20-mile radius.
What are the characteristics of shield volcanoes?
Types of volcano – composite and shield. There are two main types of volcano – composite and shield. The two types of volcano form in different places and have very different characteristics.
What is the shape of a stratovolcano?
Stratovolcano. Stratovolcanoes have relatively steep sides and are more cone-shaped than shield volcanoes. They are formed from viscous, sticky lava that does not flow easily.
What is the main characteristics of a composite volcano?
Composite volcanoes have the following characteristics: Acidic lava, which is very viscous (sticky). Steep sides as the lava doesn’t flow very far before it solidifies. Alternate layers of ash and lava.
What does a non-explosive eruption look like?
Non-explosive type eruptions mostly produce various types of lava, such as a’a, pāhoehoe and pillow lavas. Some signs that a volcano may soon erupt include earthquakes, surface bulging, gases emitted as well as other changes that can be monitored by scientists.
How would you describe a volcano?
A volcano is defined as an opening in the Earth’s crust through which lava, ash, and gases erupt. The term also includes the cone-shaped landform built by repeated eruptions over time.
What is volcanic eruption in simple words?
A volcanic eruption occurs when hot materials from the Earth’s interior are thrown out of a volcano. Lava, rocks, dust, and gas compounds are some of these “ejecta”. Some eruptions are terrible explosions that throw out huge amounts of rock and volcanic ash and can kill many people.
What do kids need to know about volcanoes?
Ask your parents to check out Nat Geo Kids magazine! 3. Volcanoes are often found at meeting points of “tectonic plates”. These plates are pieces of the Earth’s surface that fit together just like a jigsaw puzzle. 4. Volcanoes can also occur over “mantle plumes”.
What kind of rock is released from a volcano?
During a volcanic eruption, hot melted rock called magma escapes from a vent, or opening, in Earth’s surface, or crust. Magma released from a volcano is known as lava. Fresh lava ranges from 1,300 to 2,200 °F (700 to 1,200 ° C) in temperature. It glows red as it flows out of the volcano’s opening.
How does magma come out of a volcano?
A volcano is an opening in the Earth’s surface that releases gas, hot magma, and ash. Volcanoes form over a very long period of time. When the magma, or hot fluid material from below the surface of the Earth, comes to the surface, the volcano erupts. The magma, or liquid rock, coming out of the volcano is called lava.
Why are effusive volcanoes rare on the Earth?
Volcanoes prove that beneath its calm surface, Earth remains a living planet. Volcanoes, like Mauna Loa in Hawaii, are effusive. Rather than a violent explosion, lava pours or flows out. Fatalities from effusive volcanoes are rare because people can usually outrun the lava.