organizational structures
compare and contrast
both alike same as
Avalanches (when a lot of snow falls from a mountain) may bury people under them. If the people are not found rapidly enough by rescue teams they will die of suffocation (not getting enough air) or of hypothermia (freezing cold). The chance of surviving an avalanche is as follows: 92% if found within 15 minutes 30% if found within 35 minutes (victims die of suffocation) nearly zero after two hours (victims die of injuries and hypothermia)
cause and effect
Fire needs three things to burn: oxygen, fuel, and heat. Fuels can be wood, tinder, coal, or any other substance that will easily oxidize. Therefore, a fire can be stopped in three different ways, by removing any of the three things it needs to burn. The fuel can be removed. If a fire burns through all of its fuel and extra nearby fuel is removed, the fire will stop burning. The oxygen can be removed. This is called "smothering" a fire. Fires cannot burn in a vacuum or if they are covered in carbon dioxide. The heat can be removed. The most common way to remove heat is to use water to absorb that heat, putting the fire out.
cause and effect
This morning was crazy. My alarm clock was set for PM instead of AM, so I woke up really late. I just threw on some clothes and ran out the door. I rode my bike as fast as I could and thought that I was going to be late for sure, but when I got there everyone was outside and there were firetrucks all lined up in front of school. I guess somebody pulled the fire alarm before class started. It worked out though, because nobody really noticed or minded that I was tardy.
chronological
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.
compare and contrast
Lightning and thunder are related events. Lightning is a sudden, violent flash of electricity that occurs between a cloud and the ground or between two clouds in the sky. A lightning bolt can be several miles long and can be straight or forked. It is very hot, with an average temperature of 34 000 degrees Celsius. This causes the air around the electric bolt to expand, producing lots of sound energy. It is this sound energy that we hear as thunder. So, lightning and thunder are caused by the same event, but lightning is light energy, or electromagnetic energy, whereas thunder is sound energy. Thus, we see lightning and hear thunder.
compare and contrast
Linux and Windows are both operating systems. Computers use them to run programs. Linux is totally free and open source, so users can improve or otherwise modify the source code. Windows is proprietary, so it costs money to use and users are prohibited from altering the source code.
compare and contrast
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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for example such as for instance, describe
When a river receives a lot of extra water it may flood. During a flood there is plenty of water, and most people wouldn't think that dehydration was a serious risk, but flood waters are mostly polluted and not safe to drink. People who drink the contaminated water may suffer from illnesses or diseases such as typhoid. You can prepare for flooding by filling many containers with fresh clean drinking water. You can also use sandbags to protect your house and to soak up the water. Be prepared and be safe.
problem and solution
Tsunamis are very long waves in the ocean, sometimes hundreds of miles long. Tsunamis usually start suddenly. They may begin as normal waves and change to big waves very quickly. After this change, tsunami waves will travel at great speed across the ocean with little energy loss. Just before they hit land, the water will draw back off of the coast. If the slope of the coast is shallow, the water may pull back for many hundreds of feet. People who are unaware of the danger may be drawn by this strange site and remain on the shore. When the tsunami finally hits, it may remove sand from beaches, destroy trees, damage houses and even destroy whole towns. Tsunamis are tremendously powerful.
sequence
problem and solution
since because answer
cause and effect
since so result
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