Will give 20 points and will mark as

1. the surface of the earth is divided into pieces called “tectonic plates.” these plates move. when the plates rub against each other, they do not move smoothly. when the plates do not move smoothly, earthquakes result. some parts of the world get more earthquakes than other parts. the parts of the earth that get most earthquakes are near the edges of these plates.

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2. some countries, such as japan, or parts of a country, like california in the united states, have a lot of earthquakes. in these places it is a good practice to build houses and other buildings so they will not collapse when there is an earthquake. this is called seismic design or "earthquake-proofing".

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3. the ability of a building to withstand the stress of an earthquake depends upon its type of construction, shape, mass distribution, and rigidity. different combinations are used. to reduce stress, first, the building's ground floor must be flexible. one method is to support the ground floor with extremely rigid, hollow columns, while the rest of the building is supported by flexible columns located inside the hollow columns. a different method is to use rollers or rubber pads to separate the base columns from the ground, allowing the columns to shake parallel during an earthquake. next, the outdoor walls should be made with stronger and more reinforced materials such as steel or reinforced concrete. then, to prevent collapsing, the roof should be made from light-weight materials.

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4. a hurricane is a large storm with heavy winds and rain that begins in the ocean and builds up strength as it moves across the water. while some of the damage caused by hurricanes is from high winds, most of it is usually from tidal surge, flooding entire cities, and killing large numbers of people. a tornado is a storm that develops on land, with no warning, and moves in a circular motion with heavy winds with a funnel shape, picking up and carrying dirt, dust, and even objects. the damage caused by tornadoes is from the high velocity winds, which are extremely destructive and deadly. they can demolish entire neighborhoods in a matter of a few seconds to a few minutes. tornadoes can form when hurricanes make landfall, as their winds at ground level slow down, while the winds near the top keep their momentum, but a hurricane cannot be created by a tornado.

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5. hurricane katrina began as tropical depression twelve over the southeastern bahamas on august 23, 2005. the depression later strengthened into a tropical storm on the morning of august 24 where the storm was also named katrina. katrina continued to move into florida and became a category 1 hurricane only two hours before it made landfall around hallandale beach on the morning of august 25. the storm weakened over land but became a hurricane again while entering the gulf of mexico.

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6. have you ever wondered what the inside of a volcano looks like? deep underground is a magma chamber. the magma chamber is under the bedrock of the earth’s crust. the conduit or pipe runs from the magma chamber to the top of the volcano. the conduit connects the magma chamber to the surface. most volcanoes also have a crater at the top. volcanoes are quite a sight, and you can enjoy this site all over the universe. volcanoes are found on planets other than earth, like the olympus mons on mars.

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