Chapter 2.3 Habitats, communities, eco., pyramids

Question 1

What are abiotic factors

Answer 1

These are the things that make up a habitat,

Question 2

What are biotic factors

Answer 2

These are the living organisms that live in a habitat.

Question 3

What is a trophic level

Answer 3

The various steps in a food chain at which the transfer of food/energy takes place from one organism to another organism is known as trophic level.

Question 3

What is the ecosystem

Answer 3

It is the name for a habitat and community of organisms which live in it

Question 4

What is a food web

Answer 4

A food web is all of the food chains in an ecosystem connected to each other. Each organism in an ecosystem occupies a specific level/position in a food chain. For example producers make up the start of our ecosystem.

Question 5

What is a community

Answer 5

It is a group of organism which live in a specific habitat and are adapted to its factors.

Question 6

What is a habitat

Answer 6

It is a place where a group of organisms can live. Different places/habitats have different types of organisms living in it.

Question 6

The shorter the food chain is, the more energy the consumers can retain

Answer 6

shorter, energy

Question 7

The third consumer in the food chain may be an omnivore

Answer 7

omnivore

Question 8

The fifth consumer is usually the top carnivore

Answer 8

top carnivore

Question 9

What is another use of energy

Answer 9

to make new cells, muscles and tissues. (when the organism increases in size, it grows.)

Question 10

What is an ecological pyramid

Answer 10

These pyramids show the number of organisms at each trophic at a particular habitat.

Question 11

What are the three types of ecological pyramids

Answer 11

1. Pyramid of Numbers - which show the number of organisms at a trophic level in a particular habitat.
2. Pyramid of Mass - shows the total mass of all the organisms at diff. trophic levels “ “ “ “ “ “
3. Pyramid of Energy - shows the amount of energy being passed down the food chain at different levels

Question 12

Energy ________ as it is _________ down

Answer 12

decreases, passed

Question 13

Only _____ of the total energy is passed down to the next trophic level

Answer 13

10%

Question 14

the width of the box shows…

Answer 14

how many organisms are present at a trophic level

Question 15

The _______ the box (in the pyramid is), the _____ _________ of organisms there are

Answer 15

wider, more number

Question 16

As you go __________up the pyramid, the ________ of organisms _______

Answer 16

higher, amount, decrease

Question 17

The pyramid shape depends on …

Answer 17

the organisms in the habitat

Question 18

Why are fungi and bacteria important?

Answer 18

They are both decomposers which have a special way of obtaining food.
(They break down dead organisms into simple substances and absorb that substances)
When they do this, they clean up the environment and the leftovers are absorbed back into the soil and get recycled.
These nutrients are important for the soil and more organisms can be grown using them. They clean up the environment as well, by doing this.