Answers to Food chains and webs worksheet
Page 2: Food chain questions
1. Matter and energy
2. The Sun
3. A producer (that uses an energy source)
4. A producer (autotroph)
5. Photosynthesis and chemosynthesis
6. From hot vents
7. Eats only plants
8. First order consumers (primary consumers)
9. Carnivores or second order consumers
10. Animals
11. Tertiary (third order)
12. (Diagram…show me and I’ll correct it)
Page 4: Food web questions
1. An arrow
2. Decreases (some lost as heat)
3. A diagram indicating all the feeding relationships in an ecosystem
4. Feeding levels
5. Something making its own food (by photosynthesis)
6. 1st trophic level = plants, 2nd trophic level = herbivores
7. 3rd trophic level = carnivores, omnivores or second order consumers
8. carnivores, omnivores
9. Second order consumers
10. Third order consumers
11. Fourth order consumers, third order consumers
12. Vultures, worms, crabs…feed on dead organisms
Page 7: Questions
1.
2.
3.
4.
5.
What eats what
Energy
Autotrophs, producers
Herbivores, first order consumers
Top consumer or top predator
Page 8: Questions
1.
2.
3.
4.
5.
6.
autotrophs
consumers
producers
a producer
herbivores
carnivores
Page 11: Definitions
Term
Food chain
Food web
Autotroph
Heterotroph
Carnivore
Herbivore
Primary
consumer
Secondary
consumer
Tertiary
consumer
Quaternary
consumer
Definition
The sequence of who eats whom in a biological community
The network of all the interrelated food chains in a biological
community
An organism that makes its food from light or chemical energy
without eating
An organism that gets its energy from eating other organisms
An organism that eats meat
An organism that eats plants
A plant (mistake on sheet) eater that eats autotrophs
A meat eater that eats primary consumers
A meat eater that eats secondary consumers
A meat eater that eats tertiary consumers
Page 12 (examples)
Primary consumers: cows, stick insects, caterpillars
Secondary consumers: birds, ants
Tertiary consumers: wild cats
Quaternary consumer: mountain lion