Changing Ecosystems

Open Ended

Which option do you think is the correct answer? Explain your answer.

Multiple Select

What type of changes you observed in the video? (select 2)

• Biological changes

• Oceanic changes

• Physical changes

• Sky changes

Open Ended

What do you think happened to the ecosystem in the video? (1 minute)

Multiple Choice

Natural and human disruptions to physical and biological components of the ecosystems result in shift in populations.

• True

• False

Discussion - ​Why might an ecosystem change gradually overtime?

Open Ended

What is the definition of an ecosystem? (page 94)

Multiple Choice

Both living and nonliving things in ecosystems can change over time.

• True

• False

Match

Match the word with its meaning

• Succession

• Ecological

• Climax

• Population

• Primary

Slow change

related to environment

Stable

Members of same species

First or initial

• Slow change

• related to environment

• Stable

• Members of same species

• First or initial

Multiple Choice

Ecological succession can be noticed in day-to-day life and happens quickly.

• True

• False

Multiple Choice

In ecological succession, a new community _______ the old community.

• destroy

• replace

Multiple Select

How has this system changed initially? (select 2)

• During volcanic eruption, molten lava flows.

• Lichen break down the rock to build soil

• Lava cools and hardens into bare rock.

• A climax community changed.

Multiple Choice

A landside exposes a large rocky outcrop of a mountain. What kind of succession would occur here?

• Climax community

• Primary succession

• Secondary succession

• Ecological Succession

Multiple Choice

Lichens are present in the second step of secondary succession.

• True

• False

Multiple Select

How do primary and secondary successions differ? (select 2)

• Secondary involves new areas of land.

• Primary involves new areas of land.

• Secondary involves a disturbance or destroying an existing ecosystem.

Multiple Choice

The image shows which type of succession

• Primary

• Secondary

Multiple Choice

The image shows which type of succession?

• Primary

• Secondary

Multiple Choice

The image shows which type of succession?

• Primary

• Secondary

Multiple Choice

The image shows which type of succession?

• Primary

• Secondary

​Vocabulary

• Aquatic: related to water.

• Sediment: something that sinks to the bottom of a liquid.

• Eutrophication: a body of water becoming nutrient rich.

• Weathering: breaking down rocks to become sediment

• Runoff: water that moves from land to water body

• Nutrient: a substance that promotes growth and provides energy.

Multiple Select

What changes might affect an aquatic ecosystem?

• Change of rainfall

• Change of temperature

• A falling tree that blocks a stream

• Sediment build up

Open Ended

How does the final ecosystem differ from the initial ecosystem?

Multiple Select

Sediments are MOSTLY transported by: (select 2)

• water

• wind

• gravity

• runoff

Multiple Choice

Sediments that are suspended in water can block sunlight and affect aquatic plants negatively

• True

• False

​Steps of Eutrophication:

1. Decaying organisms and runoff from fertilizers and animal waste add nutrients into a water system.

2. High nutrient levels support large populations of algae.

3. Algae uses most of the dissolves oxygen in water.

4. Less oxygen is available for fish.

5. fish dies.

Multiple Choice

Eutrophication is caused by _________

• nature

• human activity

• both

Match

Match the word with its meaning

• Nutrient

• Sediment

• Weathering

• Runoff

• Eutrophication

promotes growth and gives energy

Sinks in water

Breaking down rocks

movement of water

Body of water becomes nutrient rich

• promotes growth and gives energy

• Sinks in water

• Breaking down rocks

• movement of water

• Body of water becomes nutrient rich

​Lesson Objective

Explore how changing ecosystems affect populations.

​Recall - What are populations and ecosystems?

​Vocabulary

1. Dynamic Equilibrium: the balance between different parts of the ecosystem

2. Balance: even distribution

3. Disrupt: interrupt by causing a problem

4. Disturbance: interrupting a peaceful condition

5. Adapt: get used to a new situation

Multiple Choice

Do populations change when ecosystems change?

• Yes

• No

Multiple Choice

Changing ecosystems does not affect populations.

• True

• False

​Natural Disruptions include:

​Effects of Change

​All students must read the paragraph about the Effects of Change (page 124) and get ready to answer some questions.

Multiple Choice

• Organisms cannot adapt ________ to sudden changes.

• • easily

• • difficultly

Multiple Choice

• Slow changes like mountain formation, can ________ the ecosystem.

• • benefit

• • harm

Multiple Choice

• Some disturbances control the size of population or allow new growth for plant life.

• True

• False

​1. Organisms cannot adapt easily to sudden changes.
2. Slow changes like mountain formation, can benefit the ecosystem.
3. Some disturbances control the size of population or allow new growth for plant life.

​Effects of Change

​Lesson Objective

Multiple Choice

Human activity can have a big impact on ecosystems.

• True

• False

Multiple Choice

Humans do not create disruptions in the environment.

• True

• False

​Vocabulary

1. Resource extraction: any activity that takes resources from nature.

2. Pollution: making the environment unsafe/dirty because of man-made waste.

3. Pollutant: causes pollution

4. Contaminant: causes pollution

5. Nonnative species: organisms that live outside their natural habitat.

​Group Activity

​With your group, read pages 125+126.
Solve the worksheet that you got from your teacher.
You have 10 minutes.
If you get 10/10 you will get 4P
If you get 9 or 8 you will get 3P
If you get 7 or 6 you will get 2P