The Theory of The Theory of EVOLUTIONEVOLUTION

What is Science?What is Science?

““a way of knowing about the a way of knowing about the natural world based on natural world based on observation and experiments observation and experiments that can be confirmed or that can be confirmed or disproved by other scientists disproved by other scientists using accepted scientific using accepted scientific techniques.”techniques.”

True or FalseTrue or False

All scientists follow the same method for solving a problem.

TheoryTheory

““a well substantiated explanation a well substantiated explanation of some aspect of the natural of some aspect of the natural world that includes many world that includes many confirmed observations, laws, confirmed observations, laws, and successfully verified and successfully verified hypotheses.” hypotheses.”

Isn’t Evolution Just a Theory?

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Student ActivityStudent Activity

Student ActivityStudent ActivityHow does the scientific meaning of a term How does the scientific meaning of a term like like theorytheory differ from the way it is used in differ from the way it is used in

everyday life?everyday life?

Explain your answerExplain your answer

What is evolution?What is evolution?Evolution is when

“population of species

____________________”

How long did it take to CHANGE?

Who was Who was Charles Darwin?Charles Darwin?

Student ActivityStudent Activity

Write down at least 10-15 facts about Darwin and his discoveries from the video clip.

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Check your video facts…Check your video facts…

He loved nature (Naturalist) Sailed around the world in ____________ Collected fossils and specimens of plants and

animals especially around the ____________ _____________________________.

Developed a theory called _____________ to explain how evolution occurred.

Published: ___________________

Before Darwin’s Before Darwin’s theory of theory of Natural Natural

SelectionSelection……___________________ (1774-1829)

proposed a hypothesis for how organisms change over generation. This mechanism was known as “_______________ ___________________.”Same short

neckImproved

long neck

True or FalseTrue or False

A woman who gets a tattoo can

pass on the tattoo to her unborn

child.

What is natural selection?What is natural selection?

The process where individuals that have The process where individuals that have physical or behavioral traits (genes) that physical or behavioral traits (genes) that __________________________________their environment are their environment are more likely to more likely to ______________________ and will and will ________________________________ more successfully than more successfully than those that do not have such traits.those that do not have such traits.

Identify what each of the finches eats for dinner… WHY?

Examine the physical characteristics of the birds shown above. Which of the birds is least likely to survive by eating plants or animals that live in shallow water?

F. mallard duckG. common snipeH. red-tailed hawkJ. great blue heron

AdaptationAdaptation

A feature that has become A feature that has become __________ __________ in ain a ___________ ___________ because it provides a because it provides a _________ _________ ______________________ and is produced by and is produced by natural selection.natural selection.

Which species will do best? Why?Which species will do best? Why?

Cartoon Project Cartoon Project Left Side IANLeft Side IAN

Using your ruler, draw a 10cm x 10cm box and draw a cartoon as to what type of food this bird would eat. * write a paragraph explaining why or how the cartoon shows the concept of natural selection underneath the cartoon drawing.

Example of Adaptation and Example of Adaptation and Natural SelectionNatural Selection

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Quick Write ActivityQuick Write Activity

1. What is sickle cell?1. What is sickle cell?

2. How is malaria transmitted?2. How is malaria transmitted? 3. Explain how sickle cell is passed on from parent 3. Explain how sickle cell is passed on from parent

to offspring.to offspring.

4. How is this mutation an example of natural 4. How is this mutation an example of natural selection by adaptation?selection by adaptation?

Overview of Darwin’s Theory of Overview of Darwin’s Theory of EvolutionEvolution

Variation exists within the genes of every Variation exists within the genes of every population or species.population or species.

In a particular environment, some individuals In a particular environment, some individuals of a population or species are BETTER suited of a population or species are BETTER suited to survive.to survive.

Over time, traits with advantages tend to Over time, traits with advantages tend to spread in that population.spread in that population.

Living species today have evolved from Living species today have evolved from organisms that are extinct.organisms that are extinct.

How fast does Evolution occur?How fast does Evolution occur?

______________________- gradual - gradual change of species occur change of species occur at a slow and constant at a slow and constant rate over a long period rate over a long period of time.of time.

__________________-__________________-species occurs in periods species occurs in periods of rapid change separated of rapid change separated by periods of little to no by periods of little to no change at all.change at all.

Two hypotheses