SCOPE AND CONTINUITY CHART (Continued)


 Area

THE EARTH
AND ITS
CHANGING
CONDITIONS










MATTER AND
ENERGY ARE
SUBJECT TO
CHANGE


 GRADE IV
Plants and Animals of the Past
Plants and animals have lived
 on the earth a long time.
Plants and animals of the past
 have left their records.
Plants and animals of today are
 different from those of long
 ago.
Some plants and animals of to-
 day are in danger of becom-
 ing extinct.


 Electricity
We can get electricity by sev-
 ral ways.
Rubbing of certain substances
 may cause frictional or static
 electricity.
Useful electricity comes from
 generators or batteries.
Some substances are better con-
 ductors of electricity than
 others.
Lightning is a form of elec-
 tricity.

 Light
Many objects give off light di-
 rectly.
Some objects reflect light.
Some substances absorb light.
Light rays may be bent in pass-
 ing from one substance to an-
 other.


 GRADE V

 Time and Season
Animals and plants react to
 changes in seasons in various
 ways.
Seasons are caused by the
 movement of the earth in its
 orbit around the sun.
It is colder in winter than sum-
 mer because the sun's rays
 strike our part of the earth
 less directly.
The motions of the earth are a
 basis for our measure of time.
 Changes Around Us
Changes, both chemical and
 physical, occur in many sub-
 stances.
All substances are in the form
 of a liquid, solid, or gas.
There are many kinds of rocks.
 Air
Layers of air surround the
 earth.
Air is made up of gasses.
Air supports combustion.
Air exerts pressure.
Air expands when heated.
Clean air is necessary to health.
Objects which are lighter than
 air will float in air.
Some machines heavier than air
 can fly in air.


 GRADE VI

 Weather and Climate.
Weather depends upon many
 factors.
Weather and climate are con-
 stantly changing.
Weather may be predicted.
Seasonal changes affect plants
 and animals.
Weather conditions affect
 plants and animals.



 Electricity and Its Uses
An electric current is necessary
 to produce an electromagnet.
Electricity may be used to pro-
 duce heat and light.
Electricity helps us send mes-
 sages.
 Sound
Vibrating objects produce
 sound.
Sounds differ in loudness, pitch,
 and quality.
Sound travels in all directions.
Sound travels through some
 substances better than others.
The ear is adapted to hear
 many sounds.