about volcano

1) What is volcano?
A volcano is an opening, or rupture, in a planet's surface or crust, which allows hot, molten rock, ash, and gases to escape from below the surface.

2) What is active, dormant and extinct volcano?
A popular way of classifying magmatic volcanoes is by their frequency of eruption, with those that erupt regularly called active, those that have erupted in historical times but are now quiet called dormant, and those that have not erupted in historical times called extinct.

3) how to creat a volcano?
To make an erupting volcano you will need:

A volcano - Talk to an art teacher about making a volcano out of paper mache or plaster. If you are in a hurry to make your volcano, use a mound of dirt outside.
A container that 35mm film comes in.
Red and yellow food coloring (optional)
Vinegar
Liquid dish washing soap
What to do:

Go outside
Put the film canister into the volcano at the top
Add two spoonfuls of baking soda
Add about a spoonful of soap
Add about 3 drops of the red and yellow food coloring

Now for the eruption!:

Add about an ounce of the vinegar into the container and watch what happens

4. Which is the most famous volcano?
Mt. Vesuvius (Italy), Mt. Fuji (Japan),Mt. St. Helens(USA)

5. What is the good things and bad things of volcano?
Volcano builds new land, fertile soil, mineral resouces, spa and etc..
An erupting volcano can trigger tsunamis, flashfloods, earthquakes, mudflows and rockfalls, killing all living creatures alonge their path.

1) volcano = 火山
2) active volcano=活火山 dormant volcano=睡火山 extinct volcano=死火山
3) 地殼震動,變化.