Section 4: Units & Conversions
Fundamental Topics in Science © 2001 Texas Instruments Teacher Notes 4-6
Activity—Dimensions
This activity provides students with practice in dimensional analysis. Seven problems are
presented (the order varies each time).
Students press
Ã
A
Ä
,
Ã
B
Ä
,
Ã
C
Ä
, or
Ã
D
Ä
to select the correct answer. They earn 20 points for the
correct answer on the first try, 10 points on the second try, up to a maximum of 140 points. Tell
students if you wish them to record their scores and if they can repeat the activity to improve
their scores.
After each problem, students can select
Ã
MORE
Ä
to try another problem. At any time they can
select
Ã
MENU
Ä
to return to the
ACTIVITIES
menu. If a student is having trouble, you can suggest
that he or she select
Ã
MENU
Ä
and begin the activity again. The cumulative score is displayed
during the entire activity. The score displays after the activity is over; the student can press any
key to return to the
ACTIVITIES
menu.
Extension
Point out that certain commonly used unit combinations are given special names.
•
force Newton kg
⋅
m/s
2
•
work or energy Joule N
⋅
m
•
pressure Pascal N/m
2
Units other than standard SI units are sometimes used for convenience (such as when the SI unit
is very large or very small in the typical environment).
•
volume liter 10
/
3
m
3
•
force dyne g
⋅
cm/s
2
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