CONTENTS

sábado, 30 de junio de 2018

ECOSYSTEMS


WE KNOW :


ENVIRONMENT: are all the suroundings where a living thing is.

HABITAT: is a place where living things live in their environment.

and now, we want to know how 

living things and NON living things interact with each other in an environment we called this interaction an ECOSYSTEM.







in an ecosystem, each organism has its own niche or role to play.
Consider a small puddle at the back of your home. In it, you may find all sorts of living things, from microorganisms to insects and plants.
These may depend on non-living things like water, sunlight...




HOW LIVING THINGS AND NON LIVING THINGS INTERACT WITH EACH OTHER?

Food chains


All living things need to feed to get energy to grow, move and reproduce.
But what do these living things feed on? Smaller insects feed on green plants, and bigger animals feed on smaller ones and so on.
 This feeding relationship in an ecosystem is called a food chain.
Food chains are usually in a sequence, with an arrow used to show the flow of energy.





The grasshopper eats grass, the frog eats the grasshopper, the snake eats the frog, and the eagle eats the snake. 
Below IS A GAME some living things that can fit into a food chain. Can you build it?






Links of the Chain

There are names to help describe each link of the food chain. The names depend mostly on what the organism eats and how it contributes to the energy of the ecosystem.




Producers - Plants are producers. 


This is because they produce energy for the ecosystem. They do this because they absorb energy from sunlight through photosynthesis. They also need water and nutrients from the soil, but plants are the only place where new energy is made.

CONSUMERS


Animals are called consumers. This is because they cannot make their own food, so they need to consume (eat) plants and/or animals.

There are 3 groups of consumers.

Animals that eat only plants. HERBIVORES



Animals that eat only animals. CARNIVORES




Animals that eat both animals AND plants. Humans are also omnivores. OMNIVORES.




Decomposers - Decomposers eat decaying matter (like dead plants and animals). 

They help put nutrients back into the soil for plants to eat. Examples of decomposers are worms, bacteria, and fungi.





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