What is Life?
Riddle: What is every color, is on you, in you, and all around you, is both very large and very small, can be eaten, and can eat you? Answer: Life……. So what is life?
What is Life?
Look around you. What do you see? A classmate, a brother or sister? Look out the window, or go for a walk. You will see trees, grass, plants, dogs, cats, bugs, and many other forms of life.
Now, think about this. Life extends much further than what you can see. Everywhere around you, you can find billions and billions of tiny microscopic lifeforms.
Life is Made of Cells
All living things are made up of cells. In fact, these cells are the basic building blocks of life. As an example, have you ever seen a sandcastle? At a distance, the sandcastle looks like a smooth brown building. Yet, as you get closer, you can begin to see that it is not one smooth building. The sandcastle is made up of millions of tiny grains of sand.
Cells are tiny units of living materials separated by a cell wall or barrier. They provide orders for the body, maintain the balance of the system, and reproduce. In fact, these cells are so small, that they can only be seen with a powerful tool known as a microscope. Cells make up every part of a living thing. Your skin, your hair, fingernails, blood, bones, nerves, and muscles are all made up of cells. More importantly, these cells work together to keep the body alive.
Did You Know?
Extremophile microbes live deep in caves and can be found as far as 1,000 feet below the surface. Additionally, they can even thrive in challenging places.
Life is all around us. From many miles into the atmosphere to many feet beneath the surface of the Earth, life is everywhere. What is this stuff we call life? What are some things that all life forms have in common?