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Life Science U7-L3 Sorting and Naming Living Things

The Rain Forest, and What Is Being Lost

Every minute, an area of forest the size of dozens of football fields is cleared. Most of the living things in it have never been named.

Teacher Notes

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Lesson Goal

Students will name two dangerous effects of tropical deforestation, explain why the rain forest matters to the world and to the people who live there, and reason about a hard question with more than one side.

A Note on the Side-by-Side Rule

This lesson isn't an origins argument, so there's no sorting of observed against claimed. The one place where the lesson must stay fair is the book's You Decide question. Both sides are given their full weight and the student answers in the notebook, with no answer key.

The numbers are the 1994 book's own estimates, and the lesson says so.

Key Concepts

Species diversity is the great variety of plants and animals, and a rain forest has more of it than almost anywhere. Cutting the forest destroys species before they've even been identified.

The people who live there and the people who depend on what the forest does for the air and weather have claims that pull in different directions, and the honest answer takes both seriously.

Added From the Record

The comparison with football fields is added from the record. The book's own parts are the 50 acres a minute, the 15 percent of species identified, the estimate that a fourth of all species could be lost, the air and weather, the native people, the poor soil and the You Decide question.

Key Vocabulary

Deforestation
The destruction of forests, usually by clearing them for farms or lumber.
Species diversity
The great variety of plants and animals living in a place.
Rain forest
A thick, warm forest in the tropics that gets a great deal of rain and holds a huge variety of living things.
Carbon dioxide
A gas that plants take in from the air and that animals give off when they breathe out.
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Before You Start

The Words

The words this lesson uses. Tap a card to see what it means, then come back to them whenever a question uses one.

Part One

The Questions

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Questions about the story you just read. Pick your answer straight off, or press Find it in the story if you would rather hunt for the sentence first.

Part Two

Vocabulary Check

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The word cards are at the top of this page. Look back at them as often as you need, then answer.

When you finish: write the answers out in your own words — not copied word for word from the choices. Saying it your own way is the part that proves you understood it. Then use Print Answer Sheet for a one-page record of what was answered and scored.
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