Tennessee SPI Objective:Analyze structural, behavioral, and physiological adaptations to predict which populations are likely to survive in a particular environment.

Notes Science

Essential LearningStudents will analyze behavioral and structuraladaptations that relate to species survival.

Essential QuestionHow do species adapt their behavior and theirphysical structure in order to survive?

SPI 0807.5.2 Adaptation

Instructions1) First click on "View" from the top-menu bar.2) Then click on "Slide Show" from the drop-down menu.3) Then use the right-arrow button on your keyboard to advance through this presentation.

Environments always change over time So organisms, both plants and animals, must also change Changing is called adapting (also called adaptation) If an organism can not adapt to environmental changes they

die If too many of the organisms die, then the entire species will

go extinct

Science SPI 0807.5.2 Adaptation

Notes

Yet millions of years ago Antarctica was further north and had a warm climate.

Example: Antarctica is very cold and icy today since it is at the south pole

Environments always change over time

It moved south riding on a tectonic plate. As it moved the environment became colder.

So organisms must also change in order to survive.

One reason that environments change is due to the movement of tectonic plates.

As the environment became colder, the plants and animals there had to adapt or die.

They change seasonally and sometimes for other reasons

Science SPI 0807.5.2 Adaptations

Notes

This is called adapting

Millions of years ago Antarctica was further north and had a warmer climate.

Environments always change over time It moved south riding on a tectonic plate. As it moved the environment became colder.

Antarctica

As the environment became colder, the plants and animals there had to adapt or die.

Science SPI 0807.5.2 Adaptation

Notes

Environments always change over time

It moved south riding on a tectonic plate. As it moved the environment became colder.

Millions of years ago Antarctica was further north and had a warmer climate.

Notice that it is moving southward

As the environment became colder, the plants and animals there had to adapt or die.

Antarctica

Video Link: Tectonic Plate Movement

Science SPI 0807.5.2 Adaptation

Notes

Another reason that environments change is due to the way the Earth orbits (revolves) the sun

Sun

Earth

As the planet becomes hotter or colder, plants and animals must adapt or die.

Example: In reoccurring cycles lasting thousands to millions of years, the Earth wanders either a bit further away or a bit closer to the sun as it orbits the sun.

Environments always change over time

When Earth orbits closer to the sun, the entire planet is warmer. When Earth orbits farther away from the sun, the entire planet gets colder.

Distance

As the distance increases or decreases between the Earth and the Sun, Earth becomes colder or hotter.

Science SPI 0807.5.2 Adaptation

Notes

Another reason for this change is due to catastrophic events like volcanoes and/or objects striking the planet from space.

Example: Volcanic eruptions can throw tons and tons of rock dust and smoke into the atmosphere creating gigantic clouds that block sunlight. This affects plants, and the animals that eat them. Both the plants and animals have to adapt or die.

Environments always change over time

Video Link: Volcanic Eruption

Science SPI 0807.5.2 Adaptation

Notes

Environments always change over time Another reason for this change is due to catastrophic events

like volcanoes and/or objects striking the planet from space. Example: When large asteroids strike the Earth tons of rock dust is thrown up into the atmosphere. These dust clouds block sunlight causing our planet to become colder. This affects plants, and the animals that eat them. They must adapt or die.

Video Link: Asteroid Strike (In the Future?)

Video Link: Asteroid Strike (In the Past)

Science SPI 0807.5.2 Adaptation

Notes

QuickReview

Questions What is one reason that environments change? What is another reason that environments change? What is another reason that environment change? When environmental change occurs, what happens to the

organisms that live in the environment? What is extinction? Is extinction rare or common? Explain how humans are causing environmental change

around the planet.

Science SPI 0807.5.2 Adaptation