survival
cha- cha- changes
Balancing
Act
Extinct or
Endangered
Parasite or Host
100
Their needs are met in that environment.
Why do chipmunks in the Great Smoky Mountains survive?
100
a gradual change from one community of organisms to another.
What is succession?
100
No animal or plant drives out other animals or plants.
What is a balanced ecosystem?
100
to preserve nature's beauty and habitats of plants and animals
Why did the United States establish national parks?
100
hurts one organism and helps another
What impact does a parasite have in an ecosystem?
200
Hunt at different times than competitors; live in groups
What are two behaviors that help animals avoid or reduce competition?
200
an earthquake
What would cause an ecosystem to change quickly?
200
more foxes that eat rabbits
What would help balance this ecosystem?
200
Species become extinct if they do not adjust to changes in the Earth's environment.
Why do organisms become extinct?
200
Parasites live on another organism called a host. The parasite uses the host as a source of food and harms the host.
What is the explaination for the relationship between parasites and hosts?
300
One hunts at night, and the other hunts during daytime.
How are a hawk and an owl able to succeed, even though they compete for food?
300
a change in kinds of plants and animals
What might be the effect on an ecosystem of a climate change from rainy to dry?
300
Grass makes oxygen, and animals use it.
How do organisms' interactions help balance their ecosystems?
300
a species whose population has been reduced to such small numbers that it is in danger of becoming extinct.
What is endangered?
300
an organism that is harmed by a parasite
What is host?
400
Mining companies can replace the soil.
How can damage from strip mines be repaired?
400
The desert was once a sea or lake.
What could scientists tell from a fish fossil found in a desert?
400
The number of foxes decrease.
How would an ecosystem change if the rabbits that were the main prey for foxes became sick and died?
400
no longer living, as an entire species
What is extinct?
400
an organism that lives on or in another organism, helping itself but hurting the other organism
What is a parasite?
500
When two or more species must use the same limited resources
What is competition?
500
A flood can completely change an ecosystem quickly. For example, the water might make the grass die, which would mean the animals that eat the grass would move to another place or die, and the animals that prey on those animals would also move or die.
How could a flood affect an entire ecosystem?
500
building houses
What is one way people can disturb the balance of ecosystems?
500
Its habitat is destroyed.
What might be a reason an animal becomes extinct?
500
The death of the host would either lead to the death of the parasite or force it to look for another host.
What might happen to the parasite if its host were to die?
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