Ecosystem

.......is natural area including living and nonliving things that interact together.

Animals depend on plants to ....

• get food to grow

• use branches and twigs to build nests

• get oxygen

• to have money.

.................... break down leaves and dead animals what returns valuable nutrients to the soil.

• Bacteria, worms, and mushrooms

• predators like lions and wolves

• preys like deer or rabbits

People do harmful changes to the environment such as...........................

• draining wetlands to build over them.

• cutting down trees

• polluting the air, water, and the soil

• planting trees

..............is an organism that is introduced to a new ecosystem

• invasive spices

• extinct species

• rare species

when you move a species from its original environment and plant it in a new one , it would .......

• be helpful to the other native species.

• use up all the sources

• it blocks sunlight and use all nutrients .

• die of as it couldn't adapt to a new environment.

Humans endanger animals when they ......

• build national parks

• clean environments where animals live

• pass laws to control hunting

• clear rain forests

when plants and animals cannot adapt to their environment, their population ......

• survives

• dies off

• grows bigger

• stays the same

wildfires can affect the environment of a deer as they ....

• burn the trees that are the main source of food

• destroy the habitats of these animals

• help the deer to stay warm

• help the deer find a new kind of food

A ..........affects the environment by washing away soil and plants

• wildfire

• tornado

• flood

• drought