Upgrade to remove ads
Lesson 3: Changes in Ecosystems: Part 1 & 2
Unit 5: Ecosystems and Biomes
Terms in this set (32)
When a species is in danger of extinction, it is called an __________ species.
Ecosystems are changed by living __________ that change the environment around them, and by __________ events such as floods
Humans can change or destroy the __________ of organisms when they cut __________ to build homes.
Some organisms respond to changes in ecosystems by adapting or __________ to another place.
When a type of organism cannot respond to changes in an ecosystem, it may become __________.
Species that could not become endangered because of their low populations are known as __________ species. The biggest threat to a species is the loss of __________.
Over time, one group of species in an ecosystem is replaced by a different group of species through a process called __________.
Ecosystems can be changed by natural events or by human actions. Name some natural events:
a forest fire started by lightening, a beaver building a dam in a river, an earthquake
When a species is in danger of becoming extinct, it's called a(n) __________.
Every Tasmanian wolf on Earth has died. This means the Tasmanian wolf species is __________.
In a region where few if any species existed before or where previous species were wiped out, __________ occurs.
The first species to take hold in barren areas are __________ species, such as missed and lichens.
As larger plants and predators begin to live in an area, the community may become a(n) __________, such as a prairie.
With enough moisture, __________ may start to grow in a grassland.
In time, a fully developed ecosystem will support a(n) __________ community, which is the final stage of succession.
When a new communitu develops where a communitu had once existed, it is called __________ succession.
Secondary succession might occur in a forest that has been burned by a(n) __________ or at an abandoned farm.
A volcano erupts and lava flows over what had once been a fertile farm field. Describe the type of succession that will occur, and explain why.
Primary succession will occur because the lava will become barren rock. New soil will form, and plant and animal populations will become established.
a stable community that no longer goes through major ecological changes - the final stages
a species that is in danger of extinction
no longer in existence
the first community that develops during primary succession
the first species to populate an area
the first species to live in an area that used to be lifeless
succession on a site where an existing community has been disrupted
the process of one ecosystem gradually changing into. different type of ecosystem
Precipitation that flows into rivers, lakes, and streams is called:
The energy needed for the changes in the water cycle to take places comes from:
nitrogen-fixing bacteria in soil turns nitrogen has into:
Carbon moves through the carbon cycle in all of the processes except:
The __________ cycle involves trapping a gas into compounds in the soil.
A species becomes a(n) __________ species when the last member dies.
THIS SET IS OFTEN IN FOLDERS WITH...
Lesson 1 & 2: Cycles in Ecosystems
Lesson 6: Biomes: Part 1 & 2
Lesson 8: Water Ecosystems: Part 1 and 2
Lesson 11: Unit Review
YOU MIGHT ALSO LIKE...
Changes in Ecosystems
APES Ch. 7
Modern Biology Chapter 20 Review
OTHER SETS BY THIS CREATOR
Rebuilding a Nation: Legislative Labors
Rebuilding a Nation: Unit Review
Rebuilding a Nation: Executive Efforts