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

2. 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

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

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

5. 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.

6. Air “Photosynthesis” Oxygen, Carbon Dioxide, Nitrogen
Most living things need oxygen for the chemical
processes that release energy from food.
“Photosynthesis”
6CO H2O C6H12O O2
Plants, Algae and some Bacteria use carbon
dioxide to make oxygen.
Light Energy

7. “Cellular Respiration”
C6H12O O CO H2O + ATP
Animals on land and in water use oxygen to make
carbon dioxide.

8. 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.

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

10. 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

11. 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

12. 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

13. 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

14. 9 A ______________ obtains food by eating
other organisms.
A consumer
10 Bacteria are known as _____________ because
of the way they obtain food.
H decomposers