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1- Living things change their ...................in small
and large ways.
environments
2- One way that plants change the environment is by
absorbing ..................from the soil.
water
3- Worms change the environment by adding..................
to the soil.
nutrients
4- When water is limited, a struggle, or ........................,
among plants may occur.
competition
5- Food and water are .....................that living
things need to survive.
resources
6- The organisms that cause the most changes to the
environment are.......................
people
7- Plants and animals can lose their..................
when people clear forests.
homes
8- Cars, factories, and trash can harm the environment
by causing........................
pollution
9- Pollution increases when........................... are
drained.
wetlands
10- An organism that is new to an environment can harm it by competing for ........................that other
plants and animals need.
limited resources
When harmful materials get into the air,
land, or water
Pollution
Animals that hunt other animals
Predators
Something that helps an organism survive
Resources
The struggle for survival among living things
Competition