ARTICLE:
A 1To survive, a plant needs water and
2A plant also needs minerals
energy
from the soil and a gas called carbon
dioxide, or CO₂, from the air. 3Minerals
are elements such as nitrogen and
phosphorus that are found in the
ground and that plants need to stay
healthy 4Carbon dioxide is a gas that
plants use to make food.



B5 You already know that each plant
cell has structures that help the cell
survive. 6The whole plant also needs
structures. 7For example, a plant
has one structure to get water and a
different structure to gather sunlight.
8Plants use roots to get water and
minerals from the soil.9 Roots are
structures that also anchor plants to
the ground. 10Plants trap energy from
sunlight in their leaves. 11Leaves also
bring CO, gas into the plants. 12Do
you know what structures raise plants
above the ground? 13For flowers and
trees, it is the stems and trunks that
elevate the plants.

C 14Sometimes it is not easy to
understand what each plant structure
does. 15But often, its function can be
discovered by imagining what would
happen to the whole plant if one of its
parts were damaged or removed

D 16For example, think about a bicycle.
17What is the function of a bicycle's
handlebars? 18 Answer by thinking what
would happen if the handlebars were
broken or missing. 19You could not steer
the bicycle. 20Therefore, the function
of handlebars is to steer a bicycle. 21What
would happen if a tire went flat? 22 The
bicycle would no longer ride smoothly. 23We can use a table to organize such information.


E 24 The table below lists some bicycle
parts. 25 Their functions were found
by asking, "What would happen to the
bicycle if the part were damaged or
missing?"






QUESTIONS:

For each statement, circle T
or F for true or false. In the
blanks, write the number(s) of the
SENTENCE(s) that gives the best
evidence for the answer.


a. CO₂ exists in the atmosphere
as part of the air.
T. Or F sentence __________


b. Phosphorus is a gas
plants need to survive.
T. Or F. sentence __________
sentence 2 __________

c. Carbon dioxide is a mineral.
T. Or. F. sentence __________


d. The only function of roots is to
anchor a plant.
T. Or. F sentence __________
sentence 2 __________

2. What is the most likely meaning of
anchor as used in sentence 9?

a. loosen up
b. hold down
c. release from
d. hang on

3. What would happen to a plant if
some of its structures failed to
function?
__________________
__________________
__________________

Write the number of the sentence
that gives the best evidence for
the answer.____

4. What is the likely meaning of
elevate as it is used in sentence
13?

a. bring down

b. move sideways

c. trim shorter

d. make higher



5. What would be a good reason to
elevate a plant?
______________________
______________________
______________________

Write the number of the
paragraph that gives the best
evidence for the answer._____



6. Think about the Parts of a Bicycle
chart in the lesson. The function
of each part was learned after
thinking about what would happen
if the part were missing. Use the
same kind of thinking to complete
the Parts of a Plant chart below.
Also, use information about plant
parts from the lesson.