How volcanoes erupt. explain in detail for the project........
Answers
Explanation:
Although they are often a destructive force, volcanoes are an amazing facet of creation. Volcanoes erupt when magma, red-hot liquid rock, seeps up through a vent in the earth. These vents can be at the top of a mountain or on a flat area. Volcanoes can even erupt underwater if there is a vent in the ocean floor. Magma is formed when part of the earth’s mantle gets hot enough to melt. Violent eruptions can occur when pyroclastic material—a mixture of magma, rocks, ash, and hot gases—explodes upward by pressure caused by underground gases and magma.
There are over 1,500 volcanoes around the world today that are considered active, meaning it can erupt at any time. A dormant volcano (like the one in Yellowstone National Park) may become active again, but not for many hundreds or even thousands of years. An extinct volcano no longer has a lava supply and is very unlikely to ever erupt again.
Volcanic Eruption Science Projects
#1: Volcano in a Bottle (Baking Soda + Vinegar)
You can demonstrate a volcanic eruption using some simple household items. Kids usually have a great time doing this experiment, and may want to repeat it several times!
To make a big eruption, use a small plastic bottle (the size 20-oz soft drinks come in works well). Fill the bottle halfway (1 to 1.5 cups) of vinegar. To start the eruption, drop a baking soda ‘bomb’ into the bottle—wrap one tablespoon of baking soda into a small piece of tissue paper, tying the ends with string.
You should see an instant eruption—’lava’ will spurt out of the mouth of the bottle. The baking soda, a base, neutralizes the acid in vinegar. This releases carbon dioxide gas, which causes the fizzing action in your volcano.
If you want your volcano to look more realistic, use clay or playdough to make a ‘mountain’ around the bottle. Or, if you’re working outside, you might want to use dirt and pebbles. You can also add red food coloring to the vinegar solution to make it look more like lava.
To learn more about volcanoes, take a look at our Introduction to Volcanoes Science Lesson (includes two more Volcano Science Projects).
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Answer:
Volcanoes erupt when magma, red-hot liquid rock, seeps up through a vent in the earth. These vents can be at the top of a mountain or on a flat area. ... Violent eruptions can occur when pyroclastic material—a mixture of magma, rocks, ash, and hot gases—explodes upward by pressure caused by underground gases and magma.
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