In this activity, learners use the concepts of greater
than, less than, and equal to, in order to classify student height, object
size, and planet size. They will build scale models of the planets based
on their discoveries of planet size.
In the extension, advanced learners download images
of the planets and use NIH Image to identify and describe their size by
comparing them to one another.
The learners will:
measure and compare sizes of
other classmates, classroom objects, and planet images by using different
learn and distinguish the differences
between the greater than, the less than, and the equal to signs.
compare the size of Earth to
list planets in order according
represent planets by making selections
for "scale models" from various balls and other spherical objects.
build their own "scale models"
of the planets from clay, paper mache, balloons or other appropriate materials.
Science Education Standards
Mathematics Education Standards
One: Develop background for understanding less than, greater
than, and equal to by using familiar objects
Two: Measuring the size of a variety of objects
Three: Comparing the Sizes of the Objects Measured
Four: Concept Application: One to One Correspondence of
Five: Exploration of Scale Models
Six: Concept Application: Scale Models to Planet Size