Comparative Words For Essays On Global Warming

A topic sentence is the most important sentence in a paragraph. Sometimes referred to as a focus sentence, the topic sentence helps organize the paragraph by summarizing the information in the paragraph. In formal writing, the topic sentence is usually the first sentence in a paragraph (although it doesn't have to be). 

Purpose of the Topic Sentence

A topic sentence essentially tells readers what the rest of the paragraph is about. All sentences after it have to give more information about that sentence, prove it by offering facts about it, or describe it in more detail. For example, if the topic sentence concerns the types of endangered species that live in the ocean, then every sentence after that needs to expound on that subject. 

Topic sentences also need to relate back to the thesis of the essay. The thesis statement is like a road map that will tell the reader or listener where you are going with this information or how you are treating it. 

Topic Sentences and Controlling Ideas

Every topic sentence will have a topic and a controlling idea. The controlling idea shows the direction the paragraph will take.

Here are some examples:

  • Topic Sentence: There are many reasons why pollution in ABC Town is the worst in the world.  
  • The topic is “pollution in ABC Town is the worst in the world” and the controlling idea is “many reasons.”

 

  • Topic Sentence: To be an effective CEO requires certain characteristics. 
  • The topic is “To be an effective CEO” and the controlling idea is "certain characteristics." 

 

  • Topic Sentence: There are many possible contributing factors to global warming.
  • The topic is "global warming" and the controlling idea is "contributing factors." 

 

  • Topic Sentence: Fortune hunters encounter many difficulties when exploring a shipwreck.  
  • The topic is “exploring a shipwreck” and the controlling idea is “many difficulties.”

 

  • Topic Sentence: Dogs make wonderful pets because they help you to live longer. 
  • The topic is "dogs make wonderful pets" and the controlling idea is "because they help you to live longer."

 

  • Topic Sentence: Crime in poverty-stricken areas occurs as a result of a systemic discrimination. 
  • The topic is "crime in poverty stricken areas" and the controlling idea is "systemic discrimination." 

 

  • Topic Sentence: Teen pregnancy may be prevented by improved education.
  • The topic is "teen pregnancy may be prevented" and the controlling idea is "improved education."

 

  • Topic Sentence: Cooking requires a number of different skills.
  • The topic is "cooking" and the controlling idea is "many different skills."

 

  • Topic Sentence: It is important to be ready before buying a house.
  • The topic is "buying a house" and the controlling idea is it's "important to be ready." 

 

  • Topic Sentence: Graduating from high school is important for many different reasons.
  • The topic is "graduating from high school" and the controlling idea is "many different reasons."

 

  • Topic Sentence: Having a first child is difficult because of the significant adjustments in your life. 
  • The topic is "having a first child" and the controlling idea is "significant adjustments in your life."

 

  • Topic Sentence: Remodeling a kitchen successfully requires research and a good eye. 
  • The topic is "remodeling a kitchen" and the controlling idea is "requires research and a good eye." 

A carefully thought out topic sentence has two functions. First, it helps you, the author, to stay focused. Second, a clearly stated topic and controlling idea will give readers the tools they need to clearly understand what you have to say.

Remember that topic sentences set the tone for the paragraph and should relate back to the thesis or the main idea of the paper.

Do you have a good example to share? Add your example here.

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Examples of Topic Sentences

By YourDictionary

A topic sentence is the most important sentence in a paragraph. Sometimes referred to as a focus sentence, the topic sentence helps organize the paragraph by summarizing the information in the paragraph. In formal writing, the topic sentence is usually the first sentence in a paragraph (although it doesn't have to be). 

Global Warming is Real Essay

780 Words4 Pages

When thinking of global warming, one could picture a line of dominos. Imagine if someone had knocked over just one domino, what would happen to the rest of the dominos in the line? The others would follow. Global warming can be compared to dominos in that both cause a chain reaction. Carbon dioxide could very well represent the first domino since it is carbon dioxide that creates the blanket-like effect of CO2 in the atmosphere. This blanket effect sets the other dominos in motion.

The main purpose of a blanket is to keep things warm. The "blanket" around the earth keeps the earth dangerously warm. Forest fires could be one catalyst for putting the dominos in motion. The smoke that a fire produces releases carbon dioxide…show more content…

This, in turn, causes the remaining ice to melt quicker. With less ice and permafrost, the water gets warmer which can have a great affect on how strong a hurricane could become, "Warmer water is like rocket fuel for typhoons and hurricanes" (Kluger 41). The amount of category four and five hurricanes doubled over the past 35 years while the wind speed and duration of hurricanes increased fifty percent (Kluger 41).

With warmer water and the melting ice, the water level will rise because the ice is becoming water. Thermal expansion has already raised the oceans 4 to 8 inches in one-hundred years. This rise would pale in comparison to what would result if Greenland's massive ice sheets melted. If this worst-case scenario were to happen, it would raise the sea level twenty-three feet worldwide. Such a rise may engulf cities that are located at or near sea level. Major cities from Los Angeles to London would be submerged (Lovgren). Rising sea levels would also lead to coastal flooding on the Eastern seaboard, in Florida, and in other areas such as the Gulf of Mexico.

We have experienced several abnormally-strong natural disasters within the last year. For one thing, we witnessed a major tsunami that killed 226,000 people and left 617,159 people homeless while leaving 6,425 people missing. A major hurricane also smashed into the gulf coast causing $75 billion worth of damage. This became the costliest hurricane in United States

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