This is a Clilstore unit. You can .
Welcome to the science class.
Today we are talking about biotic and abiotic factors in ecosystems.
Take a look at this. This is an ecosystem.
You can find living and non living things in this ecosystem.
Let's see if you can identify.
Plants, insects, animals and fungi are living things.
Can you see some of non living things?
Rocks, soil, water, temperature, humidity and wind are some of the non living things.
Why are biotic and abiotic factors important in an ecosystem? You will see.
First of all, biotic factors interact with each other. They protect themselves, they reproduce and they eat each other.
Loock at this picture. The plant is been eaten by the caterpillar, the caterpillar is eaten by the frog, the snake is going to eat the frog and the owl is going to eat the snake. This is what we call a food chain. Sometimes the man is on top of the food chain.
Now, what would happen to these food chains if one of this animals or living things disappear? Well, then is why we consider abiotic factors important because abiotic factors determine life in ecosystems.
Here we have another ecosystem, this is a desert and you know that deserts are very dry places. Camels and cactus survive because they are adapted to the lack of water. Think of a hippopotamus. Dou you think a hippopotamus could living in a desert? Of course not. Hippopotamus need by non living things like water. Think about fish:ocean fish live in salty water, river fish live in fresh water; ocean fish could not survive in fresh water. That is another example that how abiotic factors influence life in an ecosystem.
I am sure you are going to remember very well what biotic an abiotic factors are and the importance in an ecosystem.
Now, let's see you remember.
What are biotic factors in ecosystems? Biotic factors are the living parts of the ecosystem.
Now, what are some of the abiotic factors we find in ecosystems? Well, they are many, but some are: rocks, soil, temperature, wind and water.
Why do living things need each other? Because they protect themselves, they reproduce and they eat each other.
Well children this is all for today. I hope you like these times class. Good bye.
Short url: http://multidict.net/cs/3722