All organisms have the same basic needs: Necessities of Life All organisms have the same basic needs: Food Water Air Shelter

3 groups: based on how organisms obtain their food Producers “Photosynthesis” are organisms that make their own food by using the sun’s energy, water and carbon dioxide to make oxygen and glucose. Example: Plants

Consumers “Eat” Examples: Animals are organisms that consume (eat) producers and other consumers to get energy. Examples: Animals

Decomposers “Break Down” are organisms that break down dead matter or animal wastes to get energy. Examples: Fungus and Bacteria

Water Cells are made up of 70% water Water is obtained from the fluids you drink and the food you eat. FACT: Water is so vital to our metabolism that we could only survive about three days without it.

Air “Photosynthesis” Oxygen, Carbon Dioxide, Nitrogen Most living things need oxygen for the chemical processes that release energy from food. “Photosynthesis” 6CO2 + 6H2O C6H12O6 + 6O2 Plants, Algae and some Bacteria use carbon dioxide to make oxygen. Light Energy

“Cellular Respiration” C6H12O6 + 6O2 6CO2 + 6H2O + ATP Animals on land and in water use oxygen to make carbon dioxide.

Shelter All organisms need a “Protection” place to Live, whether in a large amount of space or on a single pore on the tip of your nose.

Organisms often compete with each other for nutrients, living space and access to water and sunlight when the organism’s environment is limited.

B producers H an alga 1 Plants are known as __________ Necessities Of Life Mini Assessment 1 Plants are known as __________ because of the way they obtain food. B producers 2 Which of the following living things is a producer? H an alga

G three days 3 Like most other organisms, your body is about ____________ water. C 70% 4 How long can humans survive without drinking water or other water-rich drinks? G three days

B oxygen H carbon dioxide 5 In addition to making food, the process of photosynthesis makes B oxygen 6 What part of air is most critical for photosynthesis? H carbon dioxide

7 Because the amount of ____________ on Earth is limited, organisms often compete for resources. B space 8 Which of the following is NOT a basic need of all living things? F sunlight

9 A ______________ obtains food by eating other organisms. A consumer 10 Bacteria are known as _____________ because of the way they obtain food. H decomposers