Grade 1 - A History Of The Earth

The History of the Earth: Supplemental Guide 5 | Minerals 93

For the Rock Sort, use the rocks from the Rocks Book. Read over
the class Rocks Book to select the six description words that
students used most often to describe their rocks. Using index
cards or small pieces of paper, write one of those six words on
each card, add a small supporting illustration to help students
remember what is written on the card, and then attach the card
with tape to one of the six bins or boxes. Place the bins around
the classroom. Make one copy of Instructional Master 5B-3 (Rock
Comparison Line) for each group of four students.

Notes to Teacher

Students may be confused about the difference between rocks
and minerals. Rocks are made up of minerals, often several
different ones, but minerals are pure substances that are found
in rocks or by themselves in nature. Minerals are the same all the
way through, so we call them a sample or a specimen, not a rock.