What are the needs of organisms?

FOOD All organisms need food to survive. How do organisms obtain energy? FROM FOOD Organisms that can make their own food are called producers or autotrophs Examples: Plants Consumers cannot make their own food, they must ingest it. Also known as heterotrophs The ultimate source of energy is the SUN

WATER Without water (H2O), all plants and animals would die. About 70% of your body is water. What do plants use water for? Making food (PHOTOSYNTHESIS) ALL chemical processes require water!! These processes together are know as metabolism

AIR Air is a mixture of gases. Oxygen (O2) is needed by MOST living things Where do fish get oxygen from? Dissolved oxygen in water (O2 in H2O) What gas do plants need? Carbon Dioxide (CO2)

PLACE All organisms need a place to live (proper environment) It must provide food, water, and air, as well as be a proper location to reproduce In any environment resources are limited and organisms must compete with each other to survive. (Survival of the fittest)