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Weather Wiz Kids weather information for kids

Weather Wiz Kids weather information for kids
Volcanoes (Volcanoes are not associated with weather, but instead are natural disasters.) What is a volcano?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. Gases and rock shoot up through the opening and spill over or fill the air with lava fragments. Click Here to learn more about volcanoes from USGS. How are volcanoes formed? What are plate tectonics? Click Here to learn more about plate tectonics and the drifting of our continents. How many volcanoes are there? What are the different types of volcanoes? What is the difference between lava and magma? Why does lava take a long time to cool down? What is a pyroclastic flow? What is lahar? What is pumice? What is the largest active volcano? What is the Ring of Fire? When did Mount St. Click Here for more info on Mount St. Click Here to see an animation of an earthquake and the resulting tsunami. Know the Lingo Volcano Safety Tips Volcano Activities

What is a volcano? Introduction to volcanoes The earth's mountains, plains, plateaus, soils, rocks, etc. as we see it today is believed to have gone through many phases, with about 80% of it being carved out by the action of volcanoes. A volcano is simply a rapture (opening or vent) on the earth's surface (crust) through which molten magma (extremely hot mixture of gases, lava, ash and other burning substances) escape on to the earth's surface. How do Volcanoes look like? In May 1980, the Mountain St. Volcanoes occur at weak zones or points in the earth’s crust (including constructive and destructive boundaries). For history lovers… In A.D. 79 (really long ago) two Roman cities, Pompeii and Herculaneum, were completely buried in ash and dust in a matter of hours after a volcanic eruption. The word, ‘volcano’ was made out of the name of a Roman god of a small island in the Mediterranean sea of Sicily called ‘Volcan’. Now we shall see in a bit more detail how volcanoes come about.

Types of Volcanic Eruptions Volcanic Eruptions The most common type of volcanic eruption occurs when magma (the term for lava when it is below the Earth's surface) is released from a volcanic vent. Eruptions can be effusive, where lava flows like a thick, sticky liquid, or explosive, where fragmented lava explodes out of a vent. In explosive eruptions, the fragmented rock may be accompanied by ash and gases; in effusive eruptions, degassing is common but ash is usually not. Volcanologists classify eruptions into several different types. Hawaiian Eruption In a Hawaiian eruption, fluid basaltic lava is thrown into the air in jets from a vent or line of vents (a fissure) at the summit or on the flank of a volcano. Hawaiian eruptions get their names from the Kilauea volcano on the Big Island of Hawaii, which is famous for producing spectacular fire fountains. Strombolian Eruption Strombolian eruptions are distinct bursts of fluid lava (usually basalt or basaltic andesite) from the mouth of a magma-filled summit conduit.

Quiz Whiz: Volcanoes Back Next Quiz Whiz: What's on the Menu? Previous Quiz Whiz: The Moon Games Quiz Whiz: Volcanoes See how much you know about explosive mountains known as volcanoes. More Games African Animals Maze Game Quick Play Arctic Animal Memory Action Arctic Fox Snowboarding Animals Beaver Badminton Dive Deeper Hurricanes 101 - Ep. 3 More Freaky Forces of Nature Auroras, Snow Rollers, and Other Freakiness! Earthquake Lightning Tornado Many cave-dwelling fish don’t have eyes. More Curious Facts Volcanoes 101 - Ep. 13 More Giant's Causeway - Ep. 12 More Tornadoes 101 - Ep. 2 Hurricane Dolphin Diving x Show Link

Types of Volcanoes & Eruptions / Volcanoes / Science Topics / Learning / Home - GNS Science Volcanic Fields Volcanic fields, such as Auckland and Northland, are where small eruptions occur over a wide geographic area, and are spaced over long periods of time (thousands of years). Each eruption builds a new single new volcano, which does not erupt again. Mount Eden and Rangitoto Island are examples in Auckland. Cone Volcanoes Cone volcanoes (also called composite cone or stratovolcanoes) such as Ruapehu, Taranaki / Egmont and Ngauruhoe, are characterised by a succession of small-moderate eruptions from one location. The products from the successive eruptions over thousands of years build the cones. Caldera Volcanoes Caldera volcanoes, such as Taupo and Okataina (which includes Mt Tarawera), have a history of infrequent but moderate-large eruptions. Multiple types of eruptions can occur at each of New Zealand’s volcanoes - the eruption type can vary minute to minute. Hydrothermal eruptionAn eruption driven by the heat in a hydrothermal systems.

Volcano Safety Tips | Volcano Preparedness Mudflows are powerful “rivers” of mud that can move 20 to 40 mph. Hot ash or lava from a volcanic eruption can rapidly melt snow and ice at the summit of a volcano. The melt water quickly mixes with falling ash, with soil cover on lower slopes, and with debris in its path. This turbulent mixture is dangerous in stream channels and can travel more than 50 miles away from a volcano. Intense rainfall can also erode fresh volcanic deposits to form large mudflows. If you see the water level of a stream begin to rise, quickly move to high ground. Stay out of the area defined as a restricted zone by government officials.

Volcano Safety Tips, Volcano Preparation, Volcano Readiness A volcanic eruption can be an awesome and destructive event. Here are some tips on how to avoid danger and what to do if you're caught near an eruption. Safety Tips • Stay away from active volcanoes. • If you live near an active volcano, keep goggles and a mask in an emergency kit, along with a flashlight and a working, battery-operated radio. • Know your evacuation route. If a Volcano Erupts in Your Area • Evacuate only as recommended by authorities to stay clear of lava, mud flows, and flying rocks and debris. • Avoid river areas and low-lying regions. • Before you leave the house, change into long-sleeved shirts and long pants and use goggles or eyeglasses, not contacts. • If you are not evacuating, close windows and doors and block chimneys and other vents, to prevent ash from coming into the house. • Be aware that ash may put excess weight on your roof and need to be swept away. • Ash can damage engines and metal parts, so avoid driving.

Volcanic Materials Identification Volcanic Lava Flows and Pyroclastic Materials Volcanic materials are divided into two main groups: Pyroclastic materials and lava flow materials. Below is a list of the various volcanic material definitions describing the general characteristics of those materials, and in some cases explanations on their formation. Read through these definitions and become familiar with them before proceeding to the online activities. Lava Flow Materials Aa: Aa (pronounced "ah-ah" - a Hawaiian term), is lava that has a rough, jagged, spiny, and generally clinkery surface. Block: Fragments of lava or rock larger than 64 millimeters in size which form due to the fracturing of viscous lava flow surfaces during flow. Lava: The term used for magma once it has erupted onto the Earth's surface. Lava flow: Stream of molten rock that erupts relatively non-explosively from a volcano and moves slowly downslope. Pillow Lava: Fluid lava erupted or flowing under water may form a special structure called pillow lava.

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