Chapter 6 – Changes in EcosystemsLesson #1 – How do Ecosystems Change? Lesson #2 – How do Species Change? Lesson #3 – How do Changes Cause More Changes?

Lesson #1 - Questions

1. What can cause changes in environments?

2. What affect did zebra muscles and garlic mustard plants have on native species?

3. What type of rain is harmful to the environment?

4. What environmental affect would recycling help?

Animals Change EcosystemsOrganisms can

cause changes in ecosystems.

Some changes can help or harm the environment.

Beaver dams change the environment.

New Species in Environment/People Changing Environment

People make physical changes to ecosystems.

People change ecosystems both accidentally and on purpose.

Garbage and PollutionGarbage is

placed in landfills and pollutes the ground.

Pollution causes acid rain that can hurt plants and animals.

Ecosystems can be changed by humans as well as forces of nature.

A. TrueB. False

When people introduce new animals or plants into an ecosystem it changes.

A. TrueB. False

The garbage in landfills decays quickly. A. TrueB. False

Acid rain is caused by water pollution. A. TrueB. False

Lesson #2 - Questions

1. Describe heredity. 2. Is the color of a flamingo’s

feathers an inherited trait, or acquired?

3. Name two different adaptations. 4. Why would there be more

competition among organisms if an ecosystem changes?

Inheriting DNA

Hereditary is the process by which offspring receive half of their genes from each parent.

Because offspring inherit traits from both parents, they differ from both parents.

Traits That Are Not InheritedNot all traits are

a result of DNA

Flamingos are born white and turn pink with eating shrimp and other foods

Soil also affects plant appearance

Adaptations

An adaptation is a trait that allows an organism to better fit into an ecosystem.

Structural adaptations are changes in body parts that help animals survive.

Behavioral Adaptations Are inherited

adaptations that help animals survive.

They affect how animals behave around other animals.

Every animal inherits the same amount of genes from each parent.

A. TrueB. False

The environment does not affect a species appearance. A. TrueB. False

A hummingbirds long beak is a structural adaptation. A. TrueB. False

Adaptations to an environment can help a species live longer. A. TrueB. False

Lesson #3 - Questions

1. What adaptation allows hawks to live in cities?

2. Name a reason that humans might want to limit antibiotics and pesticides?

3. What happens to a species when it becomes extinct?

4. What might you look for to see if a species used to live on Earth?

How do changes cause more changes?

Some organisms change their behavior in response to a change, such as the kinds or numbers of other organisms in their ecosystems.

Pesticides are poisons that kill insects.

How do changes cause more changes?

When changes occur in an ecosystem, some organisms migrate to a place where conditions are more favorable.

Species that can’t move or adapt to the changes may become extinct.

Organisms adapt to harmful changes in their ecosystems. A. TrueB. False

Once organisms lose their habitats, they can never find new homes.

A. TrueB. False

An extinct species has limited numbers of its kind. A. TrueB. False

Poisons in ecosystems can travel through the food chain. A. TrueB. False