An Example of Evolution

The Peppered Moth

What is the Peppered Moth?

• In ____________ there lives a moth called the Peppered Moth.

• It is called the Peppered Moth because it is mainly white with __________ of black on it.

The Peppered Moth

• In England, the Industrial Revolution began in ________.

• Before ________ the Peppered Moth looked like this:

The Peppered Moth

• Before 1750, the Peppered Moth blended in with the trees it liked to live on.

• It was ___________________.

Tree

A Variety of the Peppered Moth

• Before 1750 there also lived a kind of Peppered Moth that was almost entirely ___________. It did not blend in with the trees it lived on.

Tree

Variety

• Even though there were two different ___________ of Peppered Moths, they were both called Peppered Moths.

• Just like some humans have light skin and some humans have dark skin. All varieties are called ___________.

A Question for You

• Which variety of Peppered Moth was easier to spot by birds who love to eat moths?

What Does That Mean?

• Because the _______ variety is easier to spot, _______ of them were around before 1750 than the light variety.

What Does That Mean?

• ________ of the light variety were able to reproduce.

• ________ of the dark variety were able to reproduce.

• The dark variety was headed towards ________________, where no more would be around ever again.

• This is called ________________________ or Survival of the Fittest.

Natural Selection

• Since the dark one’s are not as _______ to survive, they will not survive much longer. That’s why Natural Selection is called Survival of the Fittest.

The Industrial Revolution

• With the coming of the Industrial Revolution, things were about to ____________ for the Peppered Moth.

• The Industrial Revolution created factories with chimneys that pumped out dark smoke called _________.

• The soot covered everything: buildings, roads, and _________.

The Trees Changed colors

• Gradually, as the Industrial Revolution kept increasing, more and more soot covered everything.

• The bark on trees became darker and darker until they were almost _________.

The Trees Changed Colors

Trees _________ the Industrial Revolution

Trees _________ the Industrial Revolution

A Question for You

• Now after the Industrial Revolution, which variety of Peppered Moth was easier to spot by birds who love to eat moths?

What Does That Mean?

• Because the ___________ variety is easier to spot, less of them were around after 1750 than the dark variety.

What Does That Mean?

• Now, more of the dark variety were able to ______________.

• Less of the light variety were able to reproduce.

• The light variety was now headed towards ________________, where no more would be around ever again.

What Does All of this Mean?

• The Peppered Moth used to be mainly ___________ colored.

• But because of the Industrial Revolution, the _____________ variety (the dark variety) has now become better able to survive.

• This type of animal has ______________ because of the change in its environment.