Objective:
Informational texts often discuss cause and effect patterns,
comparison and contrast of information, and connection between
events, facts, or data. If you can identify the relationship
between ideas or events, how they are alike and how they are
different, which event comes first, or causes another event,
you will have another key to being a powerful reader.
By the time this lesson is finished, you'll
have tools to help you make all kinds of comparisons in an
informational article you read. In this lesson you will:
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Review the meaning of cause and
effect, and compare / contrast,
- Identify reading and writing strategies to help make
comparisons,
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Identify cause and effect and explain
why it matters,
- Compare and contrast facts or events,
- Score and evaluate
your answers.
Vocabulary:
These words will be used in this lesson. They might be quite
familiar to you, or you might want some review. For review,
just click the Tools tab and open Vocabulary
- Cause and Effect
- Compare and Contrast
Tips and Tools:
What is cause and effect and how do I figure out
which is the cause, and which is the effect?
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In an informational selection, writers often explain events,
ideas, discoveries, or facts in a cause/effect pattern.
Things don't just happen without a reason or cause. A cause
is a starter or a reason. Some events, facts, situations,
or ideas cause others things to happen. The
result, or reason, or consequence of a cause
is an effect.
How to identify cause and effect:
- Try an "As a result of" statement with
events in the text.
- As
a result of the torrential rainfall, the ground around
the trees was soaked, and trees toppled over.
- As
a result of the oil spill in the Pacific, marine life
washed up on the beach covered in oil and unable to
survive.
- Create a chart as you read to help understand and analyze
the connections what you read.
- In
"Dogs and People," an article you have
read, a cause & effect chart might look like this:
Cause |
Effect |
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Wolves
hung around Stone Age hunting camps and lived on scraps.
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Wolves
became domesticated. |
| Experimenters
offered the first litters of wolf pups bred for tameness
food by hand. |
Pups
in the first litters would run away or try to bite the
experimenter. |
| The
tamest foxes were bred with each other. |
The
fox offspring eventually became tame over the generations. |
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What does it mean to compare or contrast elements
in information texts?
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Compare means to find similarities,
or things that are alike, or the same. You might be looking
for similarities in two or more events, facts or ideas.
Contrast means to find differences,
or things that are not alike. You might be looking for differences
in two or more events, facts or ideas.
Remember this (if it helps):
- Compare. A pair (different
spelling) goes together. To compare, look for pairs
of things that go together, that are alike or similar.
- Contrast. Different.
- Black and white
are contrasting colors.
- Circle and square are contrasting shapes.
- Joy and sorrow are contrasting emotions.
- Gigantic and tiny are contrasting sizes.
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contrasting colors |
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contrasting shapes |
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contrasting emotions |
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contrasting size |
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compare
sports
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compare
shapes
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compare
animals
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compare
colors
(both found in fruit
colors, crayons, and hair dye)
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Are there graphic organizers I can use to help compare or
contrast events, facts or ideas?
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Of course and glad you asked!!
Here are some links to graphic organizers to
help you brainstorm or organize details to compare and or
contrast events, facts, or ideas in an informational text.
Some of these graphic organizers look like they are for stories
or poems, narrative literature, but you can adjust them to
fit informational text, or whatever you are comparing.

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How do I organize my ideas to write about similarities or
differences?
- Start out with a clear and specific introduction.
- Example:
The spider and the octopus are alike in two ways. The
poem says ...
- Example: This
story shows cats and dogs have both similarities and
differences.
- Follow with specific details, evidence from text.
- Example
They
both have eight legs and they both are carnivorous animals
(eat meat).
- Example
While
they are both common house pets, cats avoid water at
all costs, while dogs like to swim. (This
sentence compares and contrasts. You might also want
to discuss all similarities, then discuss all differences.)
- Organization of compare / contrast writing
- First list all similarities, then list all differences
- OR combine similarities and differences in one sentence
as in example above. You can write several sentences
in this format.
- End with a concluding sentence.
- Example:
There may be even more similarities between the spider
and the octopus, but these are two described in the
poem.
- Example:
The author lists even more differences and wants the
readers to choose the kind of pets they like.
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Are there special words I can use in my writing to compare
and contrast?
- Words that show similarity:
| both |
alike |
same |
| parallel |
equivalent |
uniform |
| at the same time |
comparable |
complementary |
| together |
equal |
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- Words that show differences:
| different |
although |
while |
| individual |
unique |
distinct |
| in contrast |
besides |
in spite of |
| unlike |
otherwise |
however |
| various |
dissimilar |
on the other hand |
| but |
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In the next section, you'll see some examples of how the Tips
and Tools will help you with the skills of identifying
cause and effect, and analyzing similarities and differences
in informational passages.
Example
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