Ecosystems

Question 1

Define abiotic

Answer 1

Physical and chemical components that effect the environment

Question 2

Define biotic

Answer 2

All the living organisms

Question 3

Define biome

Answer 3

A group of ecosystems around the world with similar abiotic factors

Question 4

How much of the earth is land and how much is water?

Answer 4

Terrestrial-35%

Aquatic-65%

Question 5

What are producers?

Answer 5

Autotrophs that produce their own food

Question 6

What are consumers?

Answer 6

Heterotrophs that eat for their energy

Question 7

In a food chain where do the arrows point to?

Answer 7

Where the energy goes

Question 8

How much energy of food goes to an organisms growth?

Answer 8

10-20%

Question 9

How much energy food is lost to an organisms heat?

Answer 9

40%

Question 10

How much energy from food is not digested?

Answer 10

40%

Question 11

How much energy do you gain from eating something?

Answer 11

10% of it

Question 12

How much energy from food is lost at each trophic level?

Answer 12

90%

Question 13

What are trophic level

Answer 13

The hierarchy of an ecosystem, producers is the 1st tropic level, primary consumer is the second level etc

Question 14

What is biomass?

Answer 14

Total dry weight, the amount of energy an organism gains from consuming something

Question 15

What is predation?

Answer 15

When one organism kills and eats another

Question 16

What is allelopathy?

Answer 16

When a plant/tree releases a chemical to inhibit the growth of other plants

Question 17

What is Parasitism?

Answer 17

When one organism lives on or in another and causes harm

Question 18

What is commensalism?

Answer 18

When an organism lives on or in another and doesn’t effect it

Question 19

What is mutualism?

Answer 19

When one organism interacts with another to benefit bith

Question 20

What is common living?

Answer 20

When animals live together to better deceive predators, warn of dangers and have safety in numbers

Question 21

What are decomposers

Answer 21

Detriovours feed on dead organic matter(detritus). They break this organic matter down into smaller organic molecules that can be recycled into the soil.

Question 22

What is competition?

Answer 22

Where two different organisms rely on the same resource

Question 23

Define ecosystem

Answer 23

A result of the interactions between abiotic and biotic factors in the environment

Question 24

What do plants and animals use nitrogen for?

Answer 24

The production of amino acids, proteins and nucleic acids

Question 25

What are the five forms nitrogen is found in in nature

Answer 25

Atmospheric nitrogen, nitrate, ammonium, urea and other organic nitrogen (eg, amino acids)

Question 26

What is the sign and use of atmospheric nitrogen

Answer 26

N2 it makes up 70% of the atmospher

Question 27

What is sign and use of nitrate?

Answer 27

NO3 and it’s used by some plants

Question 28

What is the sign and use of ammonium?

Answer 28

NH4 and used by some plants

Question 29

What converts atmospheric nitrogen into ammonium?

Answer 29

Nitrogen fixing bacteria in the soil

Question 30

Where are nitrogen fixing bacteria found?

Answer 30

They can be loose in the soil or in the nodules of legumes

Question 31

How is ammonium turned into nitrate?

Answer 31

By nitrifying bacteria

Question 32

How are nitrates turned into other nitrogenous compounds?

Answer 32

Plants convert them into amino acids and proteins, which are then eaten by animals and cycled through the food chain

Question 33

How do nitrogenous compounds turn into ammonium?

Answer 33

Detritivores break down dead animals and plants releasing ammonium

Question 34

How do nitrates turn into atmospheric nitrogen

Answer 34

De-nitrifying bacteria convert it

Question 35

Name three ways Aboriginals conserved/sustained the environment

Answer 35

Fire, varied diet and they wouldn’t kill small/female animals