4.7.4 trophic levels (SINGLE)

Question 1

What name is given to any level in a food chain or web?

Answer 1

Trophic Level

Question 1

What type of organism is always on the first trophic level?

Answer 1

Producers

Question 2

What are all organisms that eat other organisms within a food web or chain called?

Answer 2

Consumers

Question 3

The first consumer in a food chain is called a…

Answer 3

A Primary Consumer

Question 4

Consumers that eat other animals are called..

Answer 4

Carnivores

Question 5

The final organism in a food chain is called an..

Answer 5

Apex Predator

Question 6

What is Biomass?

Answer 6

The mass of living material in an organism

Question 7

Why do Scientists usually only measure the dry Biomass (after they have been dried in an oven)?

Answer 7

The mass varies because the amount of water varies. Measuring dry mass avoids inaccuracies.

Question 8

What % of available sunlight/energy is actually used by plants and algae

Answer 8

1%

Question 9

When a consumer eats an organism in a food chain, what % of biomass/energy is transferred

Answer 9

10%

Question 10

The biggest loss of Biomass in a food chain is through the waste products. Can you name them?

Answer 10

Water and Carbon Dioxide!

Question 11

Solid waste that is lost in a food chain is called..

Answer 11

Faeces

Question 12

What happens to the number of organisms as you go up a food chain

Answer 12

Decreases

Question 13

How do you calculate the % biomass transferred in a food chain

Answer 13

New value
________
Available value x 100 = %

Question 14

Give two reasons why leaves do not absorb all light available

Answer 14

Reflected

Wrong wavelength

Question 15

Define a ‘tertiary consumer’

Answer 15

The third organism in a chain to eat another organism

Question 16

In this food chain, what is the Lion?
Grass--> Zebra --> Lion
a) Primary
b) Secondary
c) Tertiary consumer

Answer 16

b) Secondary Consumer

Question 17

Grass–> Zebra –> Lion

In this food chain, which tropic Level is the Zebra on?

Answer 17

2nd Trophic Level