‘’’’’[-Republic of the Philippines
DEPARTMENT OF EDUCATION
REGION IV-A CALABARZON
DIVISION OF BIÑAN CITY
FIRST PERIODICAL TEST IN ENVIRONMENTAL SCIENCE 7
NAME_________________________________________
DATE______________
TEACHER: MRS. SHERYL R. VALIENTE
SCORE_____________
Direction: Read the questions carefully and encircle the letter of the correct
answer.
1. The branch of biology that studies the relationships between organisms and
their environments.
A. Biology
B. Ecology
C. Zoology
D. Botany
2. It is referring to the interaction between community and abiotic environment.
A. Ecology
B. Biotic
C. Ecosystem
D. Abiotic
3. Energy flow in an ecosystem is always:
A. Cyclic
B. Reversible
C. Unidirectional D. Multi-directional
4. An ecosystem may not undergo changes because:
A. It is a state of homeostasis
C. It has both plants and animals
B. It gets solar energy continuously D. The decomposers are present in it
5. Which of the following is not influence by human activities?
A. Depletion of ground water
C. Increased extinction rate of species
B. Destruction of mangroves and wetlands
D. Advertisements
6. Which of the following is the best description about sulfur dioxide?
A. can create smog
B. can create sulfuric acid
C. releases though combustion of sulfur containing fossil fuels
D. cannot create smog
7. Which of the following three R’s are regarded as environment friendly?
A. Reduce, Reuse, Recycle
C. Read, Register, Recall
B. Random, Reduce, Recall
D. Reduce, Rebuilt, Restrict
8. One of the best solutions to get rid of non- biodegradable wastes is
A. Burying
C. Burning
B. Dumping
D. Recycling
9. The environment incudes
A. Abiotic factors
C. Biotic factors
B. Oxygen and Nitrogen
D. Abiotic and Biotic factors
10. Rain during November is more acidic than monsoon rain due to
A. dissolved CO2
C. dissolved SO2
B. dissolved NO2
D. dissolved O2
11. Environmental influences can be divided into two categories:
A. Man made and artificial
C. Abiotic and Biotic Factors
B. Living things and biotic
D. Non-living things and abiotic
12. Which is the driving force in an ecosystem?
A. Plants
C. Solar energy
B. Producers
D. Biomass energy
13. Why all living things require a continuous supply of energy?
A. to sustain life
C. to protect organisms
B. to trap sunlight
D. to feed directly on plants
14. A group of organisms that can breed to produce fully fertile offspring
A. community
C. environment
B. species
D. ecosystem
15. An example of of abiotic component
A. Plants
B. Soil
C. Animals
D. Bacteria
16. Ecology follows ecological levels of organization such as ;
A. Organism, Population, Community, Ecosystem and Biosphere
B. Organism, Population, Community, Ecosystem and Energy
C. Organism, Population, Ecosystem and Energy
D. Population, Community, Ecosystem and Biosphere
For Questions 17-20 Please refer to the reading selection below :
A natural ecosystem occurs in nature. Examples are pristine forests, the sea floor, biomes
and rivers. Natural ecosystems are self-regulatory. They can survive even without human
interventions. They are very rich in biodiversity and natural resources.
Man-made ecosystems, on the other hand, are created to copy the conditions of natural
ecosystem. Examples are orchards, home aquarium, zoo, botanical garden and park.
These ecosystems are sustained by human interventions.
17. Man-made ecosystems are created to;
A. copy the condition of artificial ecosystem
B. copy the atmosphere of the environment
C. copy the human actions
D. copy the conditions of natural ecosystem.
18. This type of ecosystem is also known as self-regulatory ecosystem
A. Artificial ecosystem
C. man-made ecosystem
B. man-made and natural
D. natural ecosystem
19. Examples of natural ecosystems are
A. sea floor, rivers and zoo
C. forest, sea floor and rivers
B. botanical garden and rivers
D. aquarium and rivers
20. Which of the following are the examples of man-made ecosystem?
A. aquarium, zoo and orchards
C. zoo, orchards and river
B. park, rivers and zoo
D. sea floor, zoo and botanical garden
21. Choose the phrase that correctly finishes this statement. “ A species is…”
A. A specific part of the abiotic environment.
B. A way of describing all the living parts of an ecosystem.
C. A group of organisms that can successfully mate with each other and reproduce.
D. Part of the natural decomposing materials in soil.
22. Name the group of species which exploit the abiotic and biotic resources in a
similar way?
A. Guild
C. Biomes
B. Ecads
D. Community
23. Which is the correct sequence of these layers starting from the surface of the Earth
upward? (1) Mesosphere (2) Stratosphere (3) Thermosphere (D) Troposphere
A. 2,4,1,3
B. 4,2,3,1
C. 4,2,3,1
D. 2,4,3,1
24. In a food chain animals constitute the:
A. First trophic level
C. Intermediate trophic level
B. Second trophic level
D. Ultimate trophic level
25. A food web consists of
A. Interlocking food chains
C. Producers, consumers and decomposers
B. A portion of a food chain
D. A set of similar consumers
26. The primary producers in a forest ecosystem are:
A. Chlorophyll containing trees and plants
C. Herbivores
B. Carnivores
D. Bacteria and other micro-organism
27. Food Chain is a series of steps in which organisms transfer energy by eating and being
eaten. Which of the ff shows a food chain series?
A. grass
cricket
frog
raccoon
B. . cricket
grass
frog
raccoon
C. grass
frog
cricket
raccoon
.D. frog
grass
cricket
raccoon
28. Which ecological pyramid is always upright?
A. Pyramid of number
C. Pyramid of biomass
B. Pyramid of energy
D. Pyramid of number and biomass
29. In a food chain, humans are,
A. Secondary consumers
C. Primary consumers
B. Producers
D. Primary and secondary consumers
30. When number of food chains is interlocked this is called
A. Food link
B. Food chain
C. Food web
D. pyramid
31. Consider this food chain: algae
water fleas
minnows
trout
The minnows in this food chain are
A. Top carnivores
C. Tertiary carnivores
B. Secondary carnivores
D. Primary carnivores
32. Heterotrophs obtain energy from all of the following except:
A. Autotrophs
B. Herbivores
C. solar radiation
D. other heterotrophs
33. A bird stalks, kills and then eats an insect. Based on its behaviour, which ecological terms
describe the bird?
A. herbivore, decomposer
C. carnivore, consumer
B. producer, heterotroph
D. autotroph, herbivore
34. The trophic levels in Figure 1 illustrate
A. the relative amount of energy at each level
B. the amount of living organic matter at each level
C. the relative number of individual organisms at each level.
D. the producers out number first-level consumer
35. Which type of pyramid shows the amount of living tissue at each trophic level in an
ecosystem?
A. a number pyramid
C. a biomass pyramid
B. an energy pyramid
D. a food pyramid
36. If all green plants of earth are destroyed, what will happen?
A. All plants shall die
C. Only herbivores animals shall die
B. all animal shall die ultimately
D. Nothing shall happened to animals
37. What is the original source of almost all the energy in most ecosystems?
A. carbohydrates
B. sunlight
C. water
D. carbon
38. What is the term for each step in the transfer of energy and matter within a food
web?
A. energy path
B. food chain
C. trophic level
D. food pyramid
39. Most of energy available to a consumer trophic level is used by organisms for
A. Transfer to the next trophic level
B. respiration, movement and reproduction
C. producing inorganic chemical compounds
D. performing photosynthesis
40. Make a simple food chain series using the ff. organisms
Corn, chicken, frog, carrots, rabbit, snake, tiger, human
GOD BLESS YOU ALL! 
KEY TO CORRECTION IN ENVIRONMENTAL SCIENCE 7
1.B
2.C
3.C
4.A
5.D
6.C
7.A
8.D
9.D
10.C
11.C
12.C
13.A
14.B
15.B
16.A
17.D
18.D
19.C
20.A
21.C
22.A
23.B
24.C
25.A
26.A
27.A
28.C
29.C
30.C
31.D
32.C
33.C
34.C
35.B
36.B
37.B
38.C
39.B
40