Lesson #2:Lesson #2:Habitats Provide Basic Needs for Organisms

Pages 15-19Pages 15-19

2 Areas of 2 Areas of FocusFocus

A) Survival NeedsA) Survival Needs

B) Limiting Factors B) Limiting Factors of the environmentof the environment

A) Survival NeedsA) Survival Needs1.1. Survival Needs for Survival Needs for

plants and animals plants and animals include: include: ________________________ FoodFood AirAir ______________________ ______________________

2. a) 2. a) Habitat: is the Habitat: is the ____________ ____________ space where a space where a species lives. species lives.

b) The Habitat must b) The Habitat must meet the meet the ________________ ________________ needs of the needs of the speciesspecies

c) Since animals have c) Since animals have different needs, different needs, animals can only live animals can only live in certain places in in certain places in the world (biomes).the world (biomes).

Example: A polar bear Example: A polar bear can’t live in a desertcan’t live in a desert

B) Limiting FactorsB) Limiting Factors Any part of the Any part of the

________________ ________________ environment that environment that determines whether determines whether or not an organism or not an organism will be able to survive will be able to survive in an area is called a in an area is called a limiting factor.limiting factor.

5 Non-Living limiting 5 Non-Living limiting factors: factors: _____________________________________________________ ___________________

(rocks, mountains)(rocks, mountains) SunlightSunlight WaterWater __________________________________ __________________________________

i) Physical Barriers: i) Physical Barriers:

Includes anything Includes anything that ___________ an that ___________ an animal’s way from animal’s way from getting to a certain getting to a certain ecosystem.ecosystem.

This includes rivers, This includes rivers, ocean, mountainsocean, mountains

B) Limiting FactorsB) Limiting Factors

ii)ii) SunlightSunlightAnimals need a certain amount of Animals need a certain amount of sunlight in order to survive. Depending sunlight in order to survive. Depending on how their ______________ is made on how their ______________ is made up (ex. Fur) determines how much sun up (ex. Fur) determines how much sun they need. they need.

B) Limiting FactorsB) Limiting Factors

iii) Water: all organisms need water iii) Water: all organisms need water however some need __________ water however some need __________ water while others needs _____________ while others needs _____________ water.water.

iv) Temperature: Living things can only live iv) Temperature: Living things can only live in places if the temperature___________in places if the temperature___________

_______________. They won’t survive if it _______________. They won’t survive if it is too hot or cold.is too hot or cold.

B) Limiting FactorsB) Limiting Factors

v) Soil: In nature, soil gets its v) Soil: In nature, soil gets its _________________ from decomposers _________________ from decomposers breaking down waste. breaking down waste.

****Soil that has a lot of nutrients can ____****Soil that has a lot of nutrients can __________________________, making it a ______________________, making it a

better place for animals to live.better place for animals to live.

B) Limiting FactorsB) Limiting Factors

TO SUMMARIZE…TO SUMMARIZE… Plants and animals SURVIVAL NEEDS Plants and animals SURVIVAL NEEDS

are:are:

LIMITING FACTORS of the non-living LIMITING FACTORS of the non-living environment are:environment are: