Academic Year 2015 – 2016
Enrichmentsheet – 1
Lesson -1 . Introduction to Ecology
Lesson – 2 Roles in Energy Transfer
Name : ____________________________________________ Date : _________
Grade : 7
Section : ________
1. The ecosystem in the diagram below has both biotic and abiotic factors.
Which is an abiotic factor in this ecosystem?
A. fish
B. sand
C. snails
D.plants
2. Which of these statements best describes a niche in an
ecosystem?
A. the role of a species in its population
B. the role of a species in its community
C. the way a species uses the resources in
its habitat
D. the way a species interacts with other species in its habitat
3. Which of the following best describes what scientists consider when they study ecology?
A. the interactions of organisms with their environment
B. the interactions of organisms with weather and climate
C. the interactions of organisms to reproduce and produce offspring
D. the interactions of organisms with one another and the environment
4. Which of these statements describes a species?
A. A species is a group of organisms that are closely related.
B. A species is a group of organisms that live in the same habitat.
C. A species is a group of organisms that live in an area and interact.
D. A species is a group of organisms that are closely related and produce fertile offspring.
5. Green plants use energy from the sun to produce food during the process of photosynthesis.
This food provides energy to an entire food chain. What starting materials do the plants use
to make this food?
A. soil and water
B. water and oxygen
C. carbon dioxide and water
D. water, phosphorus, and nitrogen
6. Why are decomposers an essential part of a healthy ecosystem?
A. Decomposers are a necessary part of the diet of most consumers.
B. Decomposers convert plant material into a form that primary consumers can use.
C. Decomposers make resources available to producers by breaking down waste materials.
D. Decomposers extract energy from sunlight as they break down plant materials, adding
returning energy to the system.
7. The food web below shows some of the feeding relationships
among organisms in Arctic waters.
Which organism would be least affected by
overfishing for cod in Arctic waters?
A. seals
B. shrimp
C. baleen whales
D. toothed whales
8. Which of the following describes a community?
A. all populations that live in the same area
B. all populations that contain the same species
C. all populations that live in the same area and interact
D. all populations that live in the same area but do not interact
9.
All organisms must obtain energy from their environment. Every organism needs this energy in
order to grow and reproduce. How do producers obtain energy?
A. They obtain energy by eating plants, bacteria, and algae.
B. They extract chemical energy from decaying organic matter.
C. They extract energy from the chemicals in soil, air, and water.
D. They capture energy from sunlight and manufacture their own food.
10. Which of the following consumers is a herbivore?
A. cat
B. horse
C. human
D. vulture
11. The diagram below shows how a manatee gets its energy
Energy Source
Sea grass
Manatee
(a) What provides the energy for the sea grass , the manatee and the most life on Earth ?
_________________________________________________________________
(b) What role does the sea grass play in this food chain ?
__________________________________________________________________
(c) According to this diagram what type of consumer is the manatee ?
________________________________________________________________
12.
The image shows various things that make up a pond.
Which things from the image make up the pond
community?
A. water, rocks, clouds, and air only
B. fish, ducks, turtles, frogs, crayfish, and insects only
C. grasses, cattail reeds, fish, ducks, turtles, frogs,
crayfish, and insects
D. grasses, cattail reeds, water, rocks, clouds, air, fish,
ducks, turtles, frogs, crayfish, and insects
13. How is an organism’s niche different from its habitat?
A. Its niche is the organism’s role within the habitat.
B. Its niche is the climate that exists within the habitat.
C. Its niche is the place where an organism lives within a habitat.
D. Its niche is the size of the population to which the organism belongs.
14. What is the primary role of decomposers in an ecosystem?
A. to control the population of producers and consumers
B. to compete with producers for energy and other resources
C. to provide a source of energy for the producers in the ecosystem
D. to recycle energy and materials from dead producers and consumers
15. The figure below shows a food chain that might exist in a field or meadow.
Which of the following best describes what the food chain represents?
A. how an organism might change over time
B. the movement of organisms throughout the ecosystem
C. the increase in size among organisms in the ecosystem
D. the path of energy transfer from producers to consumers
16. All food chain starts with a ______________________
A. Producers
B. Consumers
C. Decomposers
17. An owl, grasshopper, grass plant, and shrew are all part of the same food chain.
Describe what a food chain represents.
___________________________________________________________________
___________________________________________________________________
What would be the order of these organisms in a food chain?
___________________________________________________________________
___________________________________________________________________
Which organism is the producer? Explain.
___________________________________________________________________
___________________________________________________________________
Which organism is a tertiary consumer? Explain.
___________________________________________________________________
___________________________________________________________________
18.
A ________________________ is the role of a population in its community , including its
environment and its relationship with other spices .
19. _____________________ are large regions that contain ecosystem.
20. Who am I ?
Herbivores , omnivores , carnivores
(a) I eat leaves , earthworms , insects : _____________________
(b) I eat grasses , fruits : _____________________________
(c) I eat insects , birds , mammals : _________________________________