«
se
ee
As each tiny thing (atom) changes it produces a kind of energy which we
cannot
see
whanged,
and
which
fa
called
"radiation."
thia anergy ig gone from
Chem.
appears on page 4.)
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When
they
have
complately
(Further explanation of radiation
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Of the things that are radioactive some have always: bean a park of the
world.
These are God-made and they will not go away.
They are in soil, in
water, in food-bearing planta and other plants, in animals, and in our bodies.
There are also radioactive things that came from the atemic bombs.
ef these changed quickly ~ during just a few minutes or days.
Some
But the others
change slowly am! are still present on the islands in the Bikini Atoll.
names of some of the
important
radioactive things are
strontium, plutonium, and americium.
after 5 years.
Of
the
part
that
remains,
cesium and one-half of the strontium will
that
remains,
one-half will
cesiua,
One-half of the oobalt will digappear
one-half
will
Another § years and Lhis process wil] continue indefinitely.
part
cobalt,
Tha
disappear
after
One-half of the
disappear after 30 years.
Of the
disappear after another 30 years.
procas3 will again continua indefinitely.
This
Plutonium and americium will not
change over hundreds and hundreds of years.
ENERGY CALLED RADIATION
Tne energy
from radioaclive materjlals is similar to heat of
fire
and
light of the aun in that it travela from Where it is formed to other places;
however, wea cannot see it, hear it, taste it, amell jt, or feel it.
int