Why Leaves Change Color Word Search (Free Printable + Answer Key)

This fall leaves word search is a fun fall classroom activity for 3rd–6th grade students, featuring words like Chlorophyll, Carotenoid, Anthocyanin, and Deciduous. Free printable worksheet with answer key included.

DCLITOEXGCIUNF
CODECIDUOUSLMD
BEVCBMJKKLPXSU
GVCHLOROPHYLLA
AECBKRSERQLCNA
LRSMUUJPKMATBX
PGURCICTQRHSMT
FRNAWWEDOOCDPC
OELATZMTCIOWIJ
LEIVBXEYSRUPGP
INGRWNASMQFNMW
AJHKONIANOYDEL
GTTIIONTJCAGNL
EGDNNTJCYYNQTF

Word List

CHLOROPHYLL
The green pigment in leaves that captures sunlight to make food. When it breaks down in fall, other colors show through.
CAROTENOID
A yellow or orange pigment found in leaves all year, hidden by green chlorophyll until fall. Carrots get their color from it too.
ANTHOCYANIN
A red or purple pigment that some trees, like red maples, make in fall. Sunny days and cool nights make the reds brighter.
DECIDUOUS
Describing trees that lose all their leaves each year, like maples, oaks, and birches.
EVERGREEN
A tree or plant that keeps green leaves or needles all year, like pines, spruces, and firs.
PIGMENT
A natural substance that gives color to plants, animals, and paints.
FOLIAGE
The leaves of a plant or group of plants. Many people travel to see colorful fall foliage.
DORMANT
Alive but resting and not growing. Deciduous trees are dormant in winter.
SUNLIGHT
Light from the sun. Shorter days with less sunlight signal trees to get ready for winter.
ABSCISSION
The process in which a layer of cells forms at the base of a leaf stem so the leaf can break off cleanly in fall.

About Why Leaves Change Color

In summer, leaves are green because of chlorophyll, the pigment plants use to make food from sunlight. As fall days grow shorter and cooler, trees stop making chlorophyll and it breaks down. That lets the yellow and orange pigments that were there all along show through, while some trees make new red and purple pigments.

Why Leaves Change Color Vocabulary

This word search covers the science of fall color: the green pigment CHLOROPHYLL, the yellow and orange CAROTENOID, the red ANTHOCYANIN, and how DECIDUOUS trees go DORMANT and drop their FOLIAGE.

How to Use This Word Search in Class

Pair this word search with a leaf chromatography experiment. Crush leaves in rubbing alcohol, dip in a strip of coffee filter, and watch hidden pigments separate over a few hours.

Printable Why Leaves Change Color Word Search Worksheet

Click the print button to print this why leaves change color word search. The printable version includes the puzzle grid and word list, perfect for classroom handouts or homework.

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