a clean flat area to do the projects:
with parapets and drawbridges, or pirate ships with cannons
by stacking layer upon layer of individual,
snap together plastic bricks.
multi-cellular organisms
are made of many, many cells.
like animals,
are made
of cells.
of skin cells
is made up of layer
upon layer of cells.
of leaf cells
Your cells come in many shapes and sizes.
cells
red blood cells
can fit end to end
across the width
of a human hair.
a red blood cell?
into daughter cells,
over and over again.
makes a copy
of materials
inside her!
that AGAIN!
grows and
divides
into two
daughter cells.
grows to become
a MOTHER cell.
divides into two daughter cells.
to look inside it.
and shape it into an egg.
It can also be oblong
or rectangular or
any simple shape you choose.
Cells come in many
shapes and sizes!
your clay CELL
by adding clay.
Make it twice
its original size.
at its center.
into TWO
CELLS.
every 20 minutes,
how many cells
will there be in:
grow and divide
into daughter cells,
over and over again.
or 1 hour
or 2 hour
That is still a fairly modest number of cells.
One hour is 60 minutes, so there are 3 doublings in an hour.
Now suppose the cells continue to multiply for seven hours?
How many doublings would that be?
That would be 7 hours x 3 doublings/hour = 21 doublings.
the number you get is above 2 million cells!
If a cell divides every 20 minutes,
one single cell can divide into 4,722,366,482,869,645,213,696 cells
in just 24 hours.
One cell into 4.722 billion, trillion!
Not millions.
Not billions.
Almost 5 billion, trillions.
In just 1 days!
single-celled organisms - -
These individual cells are so small,
they are invisible to you.
But they are all around you -- in water, in soil,
on your hands, in your mouth and inside your intestines.
The most abundant life forms on Earth even today
are single-celled organisms.
the mother cell. Change happens. Sometimes the change is helpful.
That helpful change may be passed on
as the daughter cell grows into a mother cell and splits.
With more and more cell divisions,
beneficial changes begin to accumulate.
As time goes on, descendants become more diverse and varied. Some may develop characteristics that enable them to adapt and survive changes in the environment.
a group of organisms
that descend from
a common ancestor.
to happen to some of the cells on Earth.
A few of the cell lineages
were made of many cells.
They were multicellular organisms.
to be visible. These ancient
multicellular organisms looked
like worms, fronds, disks and bags.
a single-celled
organism.
has about
30,000,000,000,000 cells.
That's 30 trillion!
That one cell has divided
into the billions and billions of cells
that is you!
All life on Earth
begins as a single cell!
Let's explore CELLS!
to ALL cells
But actually, they don’t!
There are special lineages of cells
that do not die.
They are nearly immortal.
They just divide and evolve.
They have a 4.0 billion year old lineage!
In fact, EVERY CELL IN YOUR BODY
has this ancient ancestry.
