NEEDS OF LIVING NEEDS OF LIVING THINGSTHINGS

Four Basic NeedsFour Basic Needs

Living things must satisfy their basic Living things must satisfy their basic needs for energy, water, living space, needs for energy, water, living space, and stable internal conditions.and stable internal conditions.

ENERGYENERGY

Food is an organism’s energy sourceFood is an organism’s energy source Autotroph/producer = make their own foodAutotroph/producer = make their own food Auto = selfAuto = self troph = feedertroph = feeder Heterotrophs/consumers = cannot make Heterotrophs/consumers = cannot make

their own food.their own food. Hetero = otherHetero = other

WATERWATER

Must have H2O to surviveMust have H2O to survive Dissolves more chemicals than any other Dissolves more chemicals than any other

substance on Earthsubstance on Earth 92% of blood is water92% of blood is water Organisms will survive only a few days Organisms will survive only a few days

without H2Owithout H2O

LIVING SPACELIVING SPACE

All organisms need a place to live, obtain All organisms need a place to live, obtain food and H2O, and find shelterfood and H2O, and find shelter

Space on Earth is limited so organisms Space on Earth is limited so organisms must competemust compete

STABLE INTERNAL CONDITIONSSTABLE INTERNAL CONDITIONS

Organisms must keep conditions inside Organisms must keep conditions inside their body stable despite environmental their body stable despite environmental changeschanges