SCOPE AND CONTINUITY CHART-(Continued) GRADE IV Adaptation, Survival Living in groups is sometimes necessary for survival. Plants and animals of the past were adapted to the life con- ditions of their time. When life conditions changed, many animals could not adapt themselves rapidly enough to survive. Struggle for Existence Plants and animals depend on each other. Some plants live in groups. Some animals live in communi- ties. Plants and animals reproduce themselves. Some plants and animals are better fitted to live than others (balance of nature). GRADE V Living Things Are Always Changing Living things pass through dif- ferent stages of growth. Young resemble yet differ from their parents. Plants and animals must be adapted to their environment in order to survive. Both desirable and undesirable qualities may be inherited by offspring. Plant Food Plants get their food in dif- ferent ways. Green plants make their food. Non-green plants do not make their food. A few plants eat animals. GRADE VI Improvements Many plants and animals have been domesticated by man. Domesticated plants and ani- mals have different needs from wild life. Some new varieties of plants and animals have been pro- duced. Methods of soil cultivation are constantly changing. Food for Animals Animals need food for energy and growth. Structure of animals somewhat determines their activities in obtaining food. Proper food is necessary to health. Area CONDITIONS NECESSARY TO LIFE LIVING THINGS AND THEIR ACTIVITIES