NEEDS OF ALL LIVING THINGS (TSW 2)By Nastya Mozolevych

WHAT NEEDS DO ALL LIVING THINGS HAVE?

All living things need: 1. Food 2. Water 3. Living space 4. Stable internal conditions

FOOD

All living things need food, which they use as energy.

Some organisms are autotrophs. They made their own food.

Others are hetorotrophs, they cannot make their own food. So, they eat other organisms.

WATER

All organisms need water to survive. With water they can: obtain chemicals from surroundings, break down food, grow, move substances within their bodies, and reproduce.

About 90% of organisms (living things) are made out of water.

LIVING SPACE

All living things need space to survive. They need it for it to get food, water, and find shelter.

Most of organisms need to compete for space.

STABLE INTERNAL CONDITIONS

All living things need stable internal conditions to survive.

An organism must be able to keep the conditions inside their bodies stable.

Homeostasis is the maintenance of stable condition.

Some need to keep internal conditions right to function. Others to have different mechanism for maintaining homeostasis.

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