Title 5. Interaction between humans and nature II Citation ...
INTERACTION OF LIVING THINGS AND CYCLES IN NATURE. Chapter 2 and 3 review.
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Transcript of INTERACTION OF LIVING THINGS AND CYCLES IN NATURE. Chapter 2 and 3 review.
The five levels of environmental organization. Organism: one organism of one species. Population: two or more organisms of
the same species. Community: different populations of
organisms living together. Ecosystem: a community of organisms
and the abiotic factors. Biosphere: the part of Earth where life
exists
Arrange the following pictures in the correct sequence. A._____________ B._____________ C._____________ D._____________ E._____________
One Two
Three Four Five
Two main part of an environment Biotic Factors: all the living organisms
that live and interact with one another.
Abiotic Factors: all the non-living elements of an environment.
Links in a food chain
A food chain shows the pathway of energy transfer as a result of how organisms’ eating patterns.
Consumers
Consumers can be level one (primary) or level two (secondary) consumers.
Level one consumers can be herbivores which mean they only eat plants, or omnivores which means they plants and animals.
Level two consumers can be omnivores or carnivores which eat only meat.
Food Web
A food web shows the feeding relationships between lots of different organisms in an ecosystem.
Can you answer these questions?
1. Name the living things in the food web that are producers. __________________________________________________________________________________________________2. Name the living things in the food web that are consumers. ________________________________________________________________________________________________3. Which living things does the snake eat? ______________________________________4. Which living things does the hawk eat? ______________________________________5. What is eaten by the rabbit? ______________________________________6.What is the owl classified as? ______________________________________
Energy Pyramid
An energy pyramid shows an ecosystems loss of energy as it passes from one organism to the next.
An ecosystem must have more producers than consumers or it will collapse.
An ecosystem must have more level one consumers than level two consumers are it will collapse.
Limiting Factors
The growth of a population is controlled by limiting factors.
Limiting factors are resources that are necessary for life.
Limiting factors are food, water, space. Amount of sunlight, temperature and other natural resources.
Carrying capacity and competition Carrying capacity is the largest
population an ecosystem can support. Limiting factors control the carrying capacity of all ecosystems.
Competition
Competition is when two or more individuals or populations complete for the limiting factors that are available in a particular ecosystem.
What are adaptations?
Adaptations allow predators to catch their prey, but also allow prey to escape predators.
Some adaptations are:Camouflage; speed; staying in herds;
defense chemicals; quills; talons.
Commensalism
Commensalism is a relationship where one organism benefits and the other is not affected.
Water cycle
The water cycle is the movement of water between oceans, atmosphere, land and living things.
The main parts are:EvaporationCondensationPrecipitationRun-off
Carbon Cycle
The carbon cycle is the exchange of carbon between the environment and living things.
Photosynthesis is the basis of the carbon cycle.