Changes affect organisms

Invasive plants compete with native plants for --- [choose 3]

• sunlight

• water

• oxygen

• space

People can change ecosystem in a helping way by.................................

• planting

• Erosion

Natural disasters can change the ecosystem.

• True

• False

.............................. is an organism that is introduced into a new ecosystem either by accident or on purpose by human.

• Invasive Species

• Native species

An environment can be changed by _____, which washes away soil and plants.

• 
• 
• 
• 

A farmer accidentally planted seeds of an invasive species in his field. How is the plant harmful to the environment?

• It can grow slowly.

• It will not harm the environment.

• It blocks sunlight and takes nutrients that native plants need.

• It is preferred by gardeners over native plants.

An ______ includes all living and nonliving things together in an area.

• population

• ecosystem

• consumers

• producers

A fire destroys all of the trees and plants in the forest. How might this affect the birds in the area?

• The birds will plant seeds and grow new trees.

• The birds will have more food to eat.

• The birds will plant seeds and grow new trees.

• The birds will have no place to build their homes.

An organism that is introduced into a new ecosystem either by accident or on purpose by humans is.....

• extinct

• invasive species

• adapting

• a predator

Trees give off __________ that animals need to survive.

• carbon dioxide

• sunlight

• oxygen