2.2.7 Food Chains and Webs Flashcards
What is a food chain?
A food chain is a diagram that shows what an organism eats. It shows the transfer of energy between organisms.
What do the arrows in a food chain or web tell us?
The direction that energy is travelling in.
The first organism in a food chain is called a
producer
What is a producer?
An organism that can produce its own food
The second organism in a food chain is always a…
herbivore because it always eats a producer (plant)
The second organism in a food chain is called the…
primary consumer
The third organism in a food chain is called the…
secondary consumer
The fourth organism in a food chain is called the…
tertiary consumer
The fifth organism in a food chain is called the…
quaternary consumer
What is a carnivore?
An animal that survives by eating other animals
What is a herbivore?
An animal that survives by eating palnts
What is an omnivore?
An animal that can survive by eating both plants and animals.
If an animal is eaten by another animal it is called..
prey
If an animal eats another animal it can be classed as a…
predator (carnivore)
Roughly how much energy is passed up each stage of a food chain?
10%
How do we calculate 10% of a number?
Divide the number by 100 and then times it by 10.
What is 90% of the energy that is lost between each stage of a food chain lost as?
Movement
Excretion
Maintaining body temperature
What do we call the organism at the end of a food chain
The top predator
Why is a food chain rarely more than 5 organisms long?
Not enough energy can be transferred
