1. NEEDS OF LIVING THINGS

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

3. ENERGY Food is an organism’s energy source
Autotroph/producer = make their own food
Auto = self troph = feeder
Heterotrophs/consumers = cannot make their own food.
Hetero = other

4. WATER Must have H2O to survive
Dissolves more chemicals than any other substance on Earth
92% of blood is water
Organisms will survive only a few days without H2O

5. LIVING SPACE
All organisms need a place to live, obtain food and H2O, and find shelter
Space on Earth is limited so organisms must compete

6. STABLE INTERNAL CONDITIONS
Organisms must keep conditions inside their body stable despite environmental changes