The Pathway of Life - Beginning with Children Charter School

G
Name _______________________________________________ Date ________________ Class______________
SCIENCE PUZZLERS, TWISTERS & TEASERS
It’s Alive!! Or Is It?
Blocks of Life
1. Sean borrowed his baby sister’s blocks to help him prepare for a
vocabulary test in biology. He arranged them so that each row of
blocks below spells the name of a substance that is a building
block of cells. But while he wasn’t looking, his sister rotated some
of the blocks so that the wrong side is facing toward the front.
Choose one letter from each of the blocks in a row to spell the
names of some important compounds that are found in cells.
Record the names of the compounds on the blanks provided.
a.
L
P
N
R
A
I
S
R
O
D
T
L
O
A
E
I
P
T
U
N
D
S
G
L
b.
C
I
N
I
D
A
R
L
O
A
B
C
V
E
O
N
H
P
I
C
Y
D
U
S
G
R
I
A
E
P
V
E
T
H
L
R
D
S
c.
C
N
L
I
A
E
O
M
P
T
I
S
D
B
T
C
S
E
Copyright © by Holt, Rinehart and Winston. All rights reserved.
d.
Life: Finding the Right Combination
2. Six words related to the six characteristics of living organisms are
hidden in the circle below. Rotate each ring of the circle so that
each pie-shaped section of the circle spells one of the words as
you read from the outside ring and move toward the inside ring.
Write the words on the spaces provided.
HO
REP
EL
MEOS
OWT
EDI
SM
S
C
TAB
UCT
TY
SIS
H
ION
TA
L
ER
R
ME
D
N
L
A
R
U
M
C
T
L
O
P
E
S
N
L
I
E
C
E
I
S
L
A
Y
C
R
N
W
I
O
D
B
S
T
M
OLI
H
ROD
SCIENCE PUZZLERS, TWISTERS & TEASERS 3

Name _______________________________________________ Date ________________ Class______________
It’s Alive!! Or Is It?, continued
The Pathway of Life
3. TULO (The Unidentified Living Organism) has hidden several
clues about his identity in a series of true or false questions. Begin
with the first statement and decide if it is true or false. If it is true,
circle the directions under the True column for that statement. If
the statement is false, circle the directions under the False column
for that statement. When you have answered all of the questions,
follow the directions you have circled and move along the game
board. At the end of the game, circle the type of organism that
TULO is.
Clues True False
a. Plants are decomposers.
forward forward
6 8
b. Almost all living organisms are approximately back back
70 percent water. 5 1
c. Some animals can get all of the water they need forward forward
from the food they eat. 10 4
d. Consumers break down dead organisms back back
and animal waste. 4 2
e. Oxygen is the only gas found in air.
forward forward
8 9
f. Producers make food from carbon dioxide, water, back back
and energy from the sun. 6 3
g. All organisms require the same amount of forward forward
space in which to live. 5 2
h. Most chemical reactions involved in metabolism back back
require water. 3 7
TULO
starts
here
Sunflower
Termite
Move to
the
Human
Mushroom
Move to
the
Mushroom
Soil
Microbes
Fish
Dog
Copyright © by Holt, Rinehart and Winston. All rights reserved.
Bird
Moss
Move to
the
Moss
Move
forward
2 spaces
Grass
Octopus
Move
forward
2 spaces
Human
Move
back
3 spaces
Earthworm
Bear
Algae
4 HOLT SCIENCE AND TECHNOLOGY

Answer Key
Many of the questions in this workbook are open-ended and thus are intended to elicit
thoughtful, creative responses. Therefore, in many cases a variety of correct answers are
possible and any reasonable answer should be accepted. Suggested answers are provided
below for open-ended questions as well as for questions that prompt students for morespecific
responses.
Copyright © by Holt, Rinehart and Winston. All rights reserved.
The World of Life Science, p. 1
1. a. Ask a question.
b. Test the hypothesis.
c. Communicate results.
d. Form a hypothesis.
e. Analyze the results.
f. Draw conclusions.
2. 1 - scanning electron microscope
2 - transmission electron microscope
3 - compound light microscope
4 - X ray, 5 - CT scan, 6 - naked eye
It’s Alive!! Or Is It?, p. 3
1. a. proteins b. carbohydrates
c. lipids d. nucleic acids
2. reproduction, heredity, metabolism, cells,
homeostasis, growth
3. a. F b. T c. T d. F e. F f. T g. F h. T
TULO is an earthworm.
Cells: The Basic Units of Life, p. 5
1. Sample Answers:
a. warehouses or water tower
b. Town Hall or library
c. police force or junkyard
d. factories
2. a. nor gander = organ
b. organ is my = organism
c. Once llamas = cell
d. Otis sued = tissue
3. top: mitochondria, left: ribosomes,
right: cytoplasm, bottom: Golgi complex,
phrase: The door is open.
The Cell in Action, p. 7
1. a. diffusion b. fermentation
2. centromere
3. a. passive transport b. centromere
c. exocytosis d. fermentation
e. prokaryotic cells
4. d. Each pair appears in each row and appears
right side up, sideways, and upside down.
5. cell
Heredity, p. 9
1. a. male b. true breeding
c. allele, recessive
2. a. genes b. mitosis
3. 1/2 1/3 1/6 16.7%
4. Punnett square
5. sex cell
Genes and DNA, p. 11
1. a. Bianca, Bess, and Brooke are carriers.
b. Yes, because her children have green hair.
c. No, she cannot be a child of theirs,
because she does not have green hair.
2. That cat can’t catch a rat.
3. a. lemonade nineteen adenine
b. lengthy; mine thymine
c. brand name DNA
d. hoped I greeted pedigree
4. Watson, Crick, double, Adenine, thymine
DNA is the code of life.
The Evolution of Living Things, p. 13
1. a. Beagle b. species
c. vestigial d. trait
ANSWER KEY
SCIENCE PUZZLERS, TWISTERS & TEASERS 57