Similarities and Differences: Compare and Contrast

LESSON SUMMARY

This lesson explores another organizational pattern writers often use to structure their writing: comparison and contrast.

We spend a good deal of our lives comparing and contrasting things. Whenever we want to explain something, for example, we often use comparison (showing how two or more things are similar). We might say, for example, that mint chocolate chip ice cream tastes just like a York Peppermint Pattie; or that the new manager looks just like Clint Eastwood. When we want to show how things are different or not alike, we contrast them. We might say that York Peppermint Patties are mintier than any mint chocolate chip ice cream; or that the new manager may look like Eastwood, but he doesn’t have Eastwood’s dimple

How Comparison and Contrast Work

When writers compare and contrast, they provide a way of classifying or judging the items they are discussing. They show how two (or more) things are similar or different when placed side by side. Consider, for example, the following paragraph. Read it carefully, and then answer the questions that follow.

Planting a garden is a lot like having a family. Both require a great deal of work, especially as they grow and as the seasons change. As summer days lengthen, your plants become dependent on you for sustenance, much like your children depend on you for food and drink. Like a thirsty child asking for a drink of water, your plants do the same. Their bent, wilted “body” language, translated, issues a demand much the way your child requests milk or juice. When their collective thirsts are quenched, you see the way they both thrive in your care. The fussy child becomes satisfied, and the plant reaches toward the sun in a showy display. You might also find that you have to clean the space around your plants much like you would pick up toys and clothes that have been thrown helter-skelter in your toddler’s room. Similarly, plants shed spent petals, roses need to be pruned, and weeds need to be pulled. To keep children healthy, parents protect their children against disease with medicine, and gardeners do the same with insect repellent. To nourish them, parents give children vitamins, and gardeners use fertilizer, as both promote healthy growth. As children grow and become adults, they need less and less care. However, here’s where the similarity ends. While plants die and become dormant during winter, children still maintain a vital role in the family unit.

Finding the Facts

What two things are being compared and contrasted here?

Interactive Exercise 1
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In what ways are these two things similar? (There are four similarities; list them here.)

a.
b.
c.
d.

Interactive Exercise 2
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In what ways are these two things different? (There is one aspect that is different; write it here.)

Interactive Exercise 3
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Finding the Main Idea Now that you’ve answered those questions, consider one more. Read the previous passage again, and then answer this question:

What is the main idea of this passage?

Interactive Exercise 4
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Transitional Devices

As you read the paragraph about gardeners and parents, did you notice the transitional words and phrases that show you when the writer is comparing (showing similarity) and when the writer is contrasting (showing difference)? Here’s the passage once more. As you read it this time, highlight the transitional words and phrases you find.

Planting a garden is a lot like having a family. Both require a great deal of work, especially as they grow and as the seasons change. As summer days lengthen, your plants become dependent on you for sustenance, much like your children depend on you for food and drink. Like a thirsty child asking for a drink of water, your plants do the same. Their bent, wilted “body” language, translated, issues a demand much the way your child requests milk or juice. When their collective thirsts are quenched, you see the way they both thrive in your care. The fussy child becomes satisfied, and the plant reaches toward the sun in a showy display. You might also find that you have to clean the space around your plants much like you would pick up toys and clothes that have been thrown helter-skelter in your toddler’s room. Similarly, plants shed spent petals, roses need to be pruned, and weeds need to be pulled. To keep children healthy, parents protect their children against disease with medicine, and gardeners do the same with insect repellent. To nourish them, parents give children vitamins, and gardeners use fertilizer, as both promote healthy growth. As children grow and become adults, they need less and less care. However, here’s where the similarity ends. While plants die and become dormant during winter, children still maintain a vital role in the family unit.

Interactive Exercise 5
Directions: Highlight the transitional words and phrases that showing similarity with yellow and showing difference in green.
Press to begin.

These words and phrases show similarity:

similarly likewise

like just as

in the same way in a like manner

and also

These words and phrases show difference:

but on the other hand

however conversely

yet on the contrary

nevertheless

Structure

Now look more closely at the sample paragraph to examine its structure. Exactly how is this paragraph organized?

First, you’ve noticed that the paragraph begins with a topic sentence that makes the initial comparison: “Gardeners are like parents.” Then, the paragraph identifies four ways in which gardeners are like parents:

Plants become dependent upon gardeners as children do on parents.
Plants require care from their gardeners as children do from parents.
Gardeners clean up after their plants as parents do after children.
Gardeners protect plants from “dangers” as parents protect children.

Finally, after pointing out these similarities, the paragraph concludes by pointing out an important difference between parents and gardeners:

A gardener’s responsibility for his or her plants ends with time while a parent’s doesn’t.

Perhaps you noticed something else in the way this paragraph is organized. Did you notice that every time the paragraph mentions something about a parent’s role, it also mentions something about a gardener? Each aspect of the gardener’s role is followed by a comparable aspect of the parent’s role. Thus, for every aspect of “A” (the gardener), the paragraph provides a comparable aspect of “B” (the parent) to compare or contrast. The paragraph is therefore organized like this: ABABABABAB.

This is called the point-by-point method of comparison and contrast. Each aspect of A discussed is immediately paired with that aspect of B (being dependent, requiring care, cleaning up, and protecting). On the other hand, some writers prefer to deal first with all aspects of A and then with all aspects of B. This is called the block method of comparison and contrast; it goes AAAAABBBBB. Here is the same paragraph arranged using the block method:

Planting a garden is a lot like having a family. A plant becomes dependent on the gardener and begs for water on a hot summer day. Gardeners also have to clean up the space around their plants as they shed spent petals, as they require pruning, and as they become choked with weeds. Gardeners also provide for the health of their plants through insecticide and fertilizer applications. A gardener’s responsibility for his or her plants lessens as they die at the end of the season or they go into winter dormancy. Like a gardener, a parent finds their children dependent upon them for food and nourishment. Like a gardener, a parent is constantly picking up after their children, as toys and clothes are scattered throughout the house. Like a gardener, a parent provides for the nourishment and well-being of their children with vitamin supplements, food, and medicines. However, unlike gardeners, parents will find that their responsibility lessens as the child grows, but it does not come to an end.

Here, the passage treats each of the things being compared and contrasted separately first, all aspects of the gardener, then all aspects of the parent rather than one aspect of the gardener, one of the parent; another of the gardener, another of the parent. So the organization is quite different.

But you should notice one thing that is similar in both passages: They compare and contrast aspects of A and B that are comparable or parallel. When an aspect of A is discussed, that same aspect of B (whether similar to or different from A) must be discussed. This correspondence of parts is essential for the compare and contrast technique. Look what happens, for example, when the writer does not discuss corresponding parts:

Being a parent is a lot like being a gardener. Parents must bathe, clothe, and feed their children. Parents must also create and maintain guidelines for acceptable behavior for children. Also, parents must see to it that their children get a proper education. Gardeners nurture the plants in their gardens. They pull weeds and prune them to encourage them to grow. They feed them and apply insecticides. They watch them flower and then witness their demise.

You’ll notice that this passage seems to focus on differences between gardeners and parents rather than the similarities. But is this really a fair contrast? Look at the aspects of A (the gardener) that are described here. Do they have any relationship to the aspects of B (the parent) that are described? No. And a compare and contrast passage can’t be successful unless the aspects of A and B are discussed comparably. These two paragraphs don’t really seem to have a point there’s no basis for comparison between gardeners and parents.

Practice

Suppose you were going to write a paragraph that compares and contrasts readers and detectives. The following are five aspects of being a reader and five aspects of being a detective listed. Only three items in each list are comparable. Find those three items in each list and pair them with their matching item. Remember, these items may be either similarities or differences. What’s important is that they are comparable aspects.

A reader	A detective	Choices
Looks for clues to meaning.		Has a dangerous job.
Has many different types of books to read.		Gets better at solving crimes with each case.
Can choose what book to read.		Requires lots of training.
Builds vocabulary by reading.		Doesn’t get to choose which cases to work on.
Becomes a better reader with each book.		Looks for clues to solve the crime.

Interactive Exercise 6
Directions: Drag and drop. Press to begin.

Why Compare and Contrast?

In addition to following the ABABAB or AAABBB structure, compare and contrast passages must, like all other passages, have a point. There’s a reason that these two items are being compared and contrasted; there’s something the writer is trying to point out by putting these two things side by side for analysis. This reason or point is the main idea, which is often stated in a topic sentence.

The main idea of the first paragraph you looked at in this lesson was, “Planting a garden is a lot like having a family.” In this paragraph, you learned that the writer sees a significant similarity between these two roles. Likewise, in the previous paragraph, you see a significant similarity between readers and detectives.

In both cases, you may never have thought of making such comparisons. That’s part of the beauty of the compare and contrast organization: It often allows you to see things in a new and interesting way. In addition, it serves the more practical function of showing you how two things measure up against each other so that you can make informed decisions, like about which car to buy (a compare and contrast essay might tell you which car is better) or which savings bond to invest in(a compare and contrast essay will show you which bond is best for you).

Skill Building until Next Time

As you go through your day, compare and contrast things around you. Compare and contrast, for example, your current job to your previous one. How are they alike? How are they different? Make sure the two things you analyze have comparable aspects. For example, you might want to compare and contrast the salaries, responsibilities, and benefits at both jobs.
As you make these comparisons, or if you notice compare and contrast passages in what you read, practice arranging them in both point-by-point order (ABABAB) and in block order (AAABBB).

similarly	likewise
like	just as
in	the same way in a like manner
and	also

but	on the other hand
however	conversely
yet	on the contrary
nevertheless