Page 3 - Bar Graphs

1. Work with a classmate.

(a) Decide how you will share the work and make sure that
you do not leave out fish or measure them twice. Write
down what you decided.

(b) Now measure the fish and write down your measurements
in your book.
(c) Compare your measurements with another pair of
classmates. If your measurements are not the same, discuss
the reasons and write them down.

(d) Measure again where you differed. Measure accurately. If
you have new measurements, write them down.

The measurements you made are called data. Data are
measurements of a property that varies. The lengths of goldfish
vary because the fish are not all the same age, and because they
do not all eat exactly the same amount of food, and just because
some fish grow faster and get bigger than others.

The measurements you made may also be a little different from
the measurements your classmates made, because you may not
have been completely accurate. We must plan to be completely
accurate when we gather data.

2. Jabu asks how long the fish in Tank A are. Which of sentences
A to D below best describes the lengths of the Hibuna fish?
A The Hibuna fish are not more than 8 cm long.

B The Hibuna fish are all longer than 2 cm.

C The Hibuna fish are between 2 cm and 8 cm long.

D The Hibuna fish are between 2 cm and 8 cm long, but most
are between 3 cm and 5 cm long.
3. Look at your measurements. Write a sentence to tell Jabu how
big his Huna fish are.

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