Characteristics of living organisms + kids
What are living things made up of

The characteristics of living organismsLiving organisms contain cellsLiving things obtain and use energyLiving organisms undergo growth and developmentLiving things make their offspringsLiving things respond to stimuli


Asexual Reproduction
Elements, mixtures, comp.


Needs of Living Things
Nutrients in Food
Rock Cycle
Simple Machines
States of Matter
The Five Senses
Water Cycle
WHat are living things made up of

What do living things have in common?

Let us start by considering this drawing of an aquarium.
what is a living thing
In the aquarium, what we see is a fish and a rock. There are many things that go on inside of the fish, that make it move, grow and behave the way it does. The rock does nothing but stays there. The rock can stay there for thousands of years, with or without the water, but the fish will not be able to do so. It will die at some point.

What is the difference between the fish and the rock? The fish is a living organism but the rock is not. There are five characteristics of life that the fish has, which the rock does not have.

Living thingsIt is made up of cells
Living thingsIt obtains and uses energy
Living thingsIt grows
Living thingsIt reproduces
Living thingsIt responds to changes in its environment.

These characteristics are not for a fish alone. It is the same for all living things (plants and animals). It also includes very tiny organisms that our eyes cannot see. They are known as microorganisms and include viruses, bacteria, and fungi. Because we do not see microorganisms with our eyes, it is even harder to know if they have all the characteristics of living things. We will see more examples in the next pages.

It is possible to have a non-life object display one or two of the characteristics of life. For example, a cloud can grow in size and move from one place, but it is not a living organism.

This means for something to be classified as a living organism, it must display ALL of the characteristics listed above.

Now, we shall take a closer look at each of the characteristics.

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What are the features of living things