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The Incredible Dolphin

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The Incredible Dolphin

This is a composition about comparing two things. What are the two things being
compared? Is this composition about the similarities or differences or both? What
are some signal words that show this?

Many people say dolphins are very intelligent. They seem to be able to think,
understand, and learn things quickly. But are they smart like humans or more
like cats or dogs? Dolphins use their brains differently from people. But scientists
say dolphin intelligence and human intelligence are alike in some ways. How?

FACT 1: Talk to Me
Like humans, every dolphin has its own “name.” The name is a special whistle.
Each dolphin chooses a specific whistle for itself, usually by its first birthday.
Actually, scientists think dolphins, like people, “talk” to each other about a lot of
things, such as their age, their feelings, or finding food. And like humans,
dolphins use a system of sounds and body language to communicate. But
understanding their conversations is not easy for humans. No one “speaks
dolphin” yet, but some scientists are trying to learn.

FACT 2: Let’s Play


Dolphins are also social animals. They live in groups called pods, and they often
join others from different pods to play games, and have fun – just like people. In
fact, playing together is something only intelligent animals do.

FACT 3: Fishermen’s Helpers


Dolphins and humans are similar in another way; both make plans to get
something they want. In the seas of southern Brazil, for example, dolphins use
an interesting strategy to get food. When fish are near a boat, dolphins signal to
the fishermen to put their nets in the water. Using this method, the men can
catch a lot of fish. What is the advantage for the dolphins? Why do they assist
the men? The dolphins get to eat some of the fish.

Complete the table to show the similarities and differences.


Dolphins Humans

a. play games in groups e. catch fish for food


b. have their own names f. communicate their feelings
c. use spoken words to communicate g. choose their own names
d. plan ways to do something h. use sounds and body
language to talk

Taken From: Douglas, Nancy. Reading Explorer 1. Heinle Cengage Learning: Boston, MA. 2009.

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