1. Chapter 2: Living THings
Section 1, Part 2

2. The needs of living things
All living things need -----
Water
Food
Living space
Stable internal conditions

3. All living things NEED WATER TO SURVIVE.
WHY? Organisms need water to…
Obtain chemicals from their surroundings
Break down food
Move substances within their bodies
Reproduce

4. Food
Organisms use FOOD AS THEIR ENERGY SOURCE.
Plants: Capture the sun’s energy and use it for food
Organisms that make their own food are called AUTOTROPHS
Examples: grass, moss, algae, trees, flowers…
Organisms that CANNOT make their own food are called HETEROTROPHS
Examples: animals, mushrooms, and slime molds…

5. Living space
All organisms need a place to live
Its surroundings MUST PROVIDE WHAT IT NEEDS TO SURVIVE
How do trees compete for space?
Top of the trees for SUNLIGHT
Below the ground for WATER AND NUTRIENTS
Come up with an example on your own!

6. Stable internal conditions
Organisms must be able to keep conditions inside their bodies STABLE, EVEN WHEN CONDITIONS IN THEIR SURROUNDINGS CHANGE SIGNIFICANTLY.
This is called….. HOMEOSTASIS
Example: Your body temperature stays steady even when there are changes in air temperature.