Food Webs
what is a food chain?
A series showing who eats whom
Which bird hunts lemmings in the tundra?
The snowy owl.
What is usually at the bottom of an ecological pyramid?
Producers, such as plants.
What is the name of the ground that stays permanently frozen?
Permafrost.
what is a food web?
Many connected food chains
What do we call animals that eat plants?
Herbivores.
What are producers?
Organisms that make their own food.
What small animals are an important food source for snowy owls?
Lemmings
What do rabbits eat in the food web?
Vegetation, fruits, and seeds.
What do we call animals that eat other animals?
Carnivores.
What do ecological pyramids show?
The amount of energy, biomass, or productivity at different levels.
Name one plant that grows in the tundra.
Grasses, sedges, lichens, or willows.
What might happen to foxes if the number of rabbits decreases?
Fox numbers may decrease because they have less food.
What do wolves do to catch prey in the tundra?
They travel and hunt in packs.
What are the animals that eat herbivores called?
Primary carnivores.
Why do some tundra animals migrate?
To find food and suitable conditions.
What is the difference between a food chain and a food web?
A food chain shows one feeding pathway, while a food web shows many connected pathways.
What may happen to snowy owl numbers when lemming numbers decrease?
Snowy owl numbers may decrease because there is less food.
Why is there usually less energy available at higher levels of a food chain?
Energy is lost at each feeding level.
Why can changes in lemming numbers affect snowy owl numbers?
Lemmings are food for snowy owls, so fewer lemmings can mean less food for the owls.