1. behavior
Crying is a BEHAVIOR babies use to communicate with their parents. Babies are born knowing how to cry.
Seals must learn how to balance a ball to get a treat.
behavior: something an organism does to get the things it needs to live

2. characteristic
CHARACTERISTICS, or properties, of matter can be observed with your five senses.
red
round
“squishy”
soft
shiny
size of tennis ball
solid
floats
characteristic: a quality that describes a living thing or an object; a trait

3. environment: everything that is around a living thing
Many living and nonliving parts make up a forest ENVIRONMENT.
A desert provides
the perfect ENVIRONMENT
for cacti.
environment: everything that is around a living thing

4. food chain
food chain: the path of food energy from one organism to another in an ecosystem

5. freshwater: water that does not contain salt
Lakes and underground aquifers provide the FRESHWATER we drink.
freshwater: water that does not contain salt

6. habitat: : the kind of ecosystem when an organism lives
The plant layers of a forest are an ideal HABITAT for many organisms. Small animals and birds make their homes in tree canopies, while decomposers feed on decaying matter on the forest floor .
A coral reef HABITAT provides food and shelter for millions of fish and other aquatic species.
habitat: : the kind of ecosystem when an organism lives

7. natural resource: anything in nature that people can use for energy

8. saltwater: water that contains salt
Ninety-seven percent of the water found on Earth is SALTWATER.
saltwater: water that contains salt