How Ecosystems Change

Name
Date
Class
C22L3
Content Vocabulary
LESSON 3
How Ecosystems Change
Directions: In the puzzle below, each number will correspond to one letter of the alphabet. For example, 1 = I.
Shaded letters will not be used. Crack the code by using the clues for hints. After you read the clues and fill in the
blanks, complete the chart with the number that corresponds to each letter you have used.
A
B
C
D
E
F
G
H
I
J
K
L
M
W
X
Y
Z
1
N
O
P
Q
R
S
T
U
V
1. process by which one community gradually changes into another
20
25
19
4
5
15
25
25
4
I
1
25
16
15
19
I
1
4
17
10
20
19
2. stable community that does not go through major ecological changes
15
25
4
18
18
18
16
8
5
I
1
17
22
11
3. the first species that colonize new or undisturbed land
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I
1
4
17
20
20
26
19
14
20
25
I
1
20
19
22
I
1
4
17
4. process through which a body of water becomes nutrient-rich
20
48
5
22
26
4
14
9
I
1
25
16
Biomes and Ecosystems
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
25
I
1