NEEDS OF LIVING THINGS

ENERGYG

AS E

XC

HA

NG

E

WATER

LIV

ING

SPA

CE

HO

MEO

STA

SIS

5 NEEDS OF LIVING THINGS

ENERGY/FOOD

Living Organisms need energy to perform all life functions

A lion needs energy to chase a zebra A deep sea fish needs energy to create light A human needs energy to play soccer

Main source of energy on Earth: Sun

Plants get energy from the sun to make food.

Animals (including humans!) get energy from the food they eat:PlantsOther animals

WATER

Living things are made up of water (65-75%)

Need water to:

Grow

Transport materials

Chemical reactions

GAS EXCHANGE

Gases are used in chemical reactions, release of waste, respiration.

Gases pass through membranes, gills, lungs, cells, etc.

Example: Plants take in carbon dioxide and release oxygen.

Important gases that are exchanged are oxygen, carbon dioxide, nitrogen, and methane.

LIVING SPACE

Place or location where an organism meets its needs

Has food, water, appropriate climate

HOMEOSTASIS

Keeping stable (balanced) internal conditions within the organism

Examples:pH level (acid/base)Glucose level (sugar)Oxygen levelTemperature

Humans- sweatReptiles- use sun and shade

ENERGY

GAS EXC

HAN

GE

WATE

RLI

VIN

G S

PAC

E

HO

MEO

STA

SIS