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Home | Freshwater Biomes | Marine Biomes | Aquatic Biome Quiz

Topic sentences are like the "bottom bun of a hamburger". They stabilize the rest of the expository paragraph. The explain to the reader "what" they are about to learn.

Every expository paragraph must begin with a topic sentence. The topic sentence tells the reader what you will be informing them about.

Example: The dolphin may look like a fish, but this friendly sea creature is really a mammal.

By reading this topic sentence you should realize that the following paragraph will be talking about dolphins as mammals.

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