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WorksheetsLesson 7 & 8: How Do Ecosystems Change? and How do Humans Them?
Total questions: 10
Worksheet time: 5mins
A natural change to an ecosystem occurs when
a severe drought causes plants to die.
trees are cut down to make paper.
roads are built through a forest.
a dam is constructed to hold water back.
What kind of changes take place during succession?
Animals move from one ecosystem to another.
One or more species die out and no longer exist on Earth.
Species slowly replace each other as the landscape changes.
Plants stop growing and making food when days get shorter and colder.
After a forest fire, new plants and those that were not burned will __________ because the fire released nutrients into the soil.
slowly die
grow faster
stop growing
become extinct
Some animals hibernate during the winter because they
lay eggs that need to be kept warm.
need to avoid predators.
change from one form to another.
cannot find enough food.
Climate change can cause changes to ecosystems. What can happen to organisms that do not change with their ecosystems?
They can disappear from Earth.
They can stop the ecosystem from changing.
They can form new ecosystems.
They can be unaffected by the change.
Clearing prairies to plant crops is a negative change to an ecosystem because
people plant trees to replace the ones they cut down.
the way organisms interact in food webs is disrupted.
humans are using the land to build farms instead of homes.
organisms interact in the same ways before and after the change.
Anything that people add to the environment that harms living things is called
pollution.
chemical waste.
damage.
human development.
All the goods and services people need or want are either made of __________ or produced using them.
plants
animals
chemicals
natural resources
After an ecosystem has been destroyed, it
sometimes can be restored.
always slowly recovers on its own.
can never recover from the damage.
usually returns back to how it was before.
A(n) __________ species is a non-native organism that causes harm to the environment.
native
natural
extinct
invasive
