Grade 7 POP Quiz
Interactions within Ecosystems
Total Questions: 20
Name: ________________________________________________________Time: 15 minutes
Module 1: Matter and Energy in Ecosystems
Lesson 2: Flow of Energy (Q1–7)
1. What is the primary source of energy for most ecosystems?
a) The moon
b) The sun
c) Volcanoes
d) Wind
2. Organisms that make their own food using sunlight are called:
a) Consumers
b) Decomposers
c) Producers
d) Herbivores
3. What type of consumer eats only plants?
a) Omnivore
b) Herbivore
c) Carnivore
d) Decomposer
4. In a food chain, energy flows from:
a) Decomposers → Consumers → Producers
b) Producers → Consumers → Decomposers
c) Consumers → Producers → Decomposers
d) Carnivores → Herbivores → Plants
5. Which of the following correctly describes a food web?
a) A linear sequence of energy flow
b) A complex network of interconnected food chains
c) A cycle where energy is created and destroyed
d) A simple chain where all organisms eat the same food
6. What is the role of decomposers in an ecosystem?
a) Capture sunlight for photosynthesis
b) Eat only primary consumers
c) Break down dead organisms and recycle nutrients
d) Provide energy for carnivores
7. In an energy pyramid, which level has the most available energy?
a) Producers
b) Primary consumers
c) Secondary consumers
d) Tertiary consumers
Lesson 3: Cycling Matter (Q8–14)
8. The process by which water moves through the environment is called:
a) Carbon cycle
b) Oxygen cycle
c) Water cycle
d) Nitrogen cycle
9. Which process in the water cycle involves water vapor cooling and forming clouds?
a) Evaporation
b) Condensation
c) Precipitation
d) Transpiration
10. Which of the following is a major way carbon moves through the ecosystem?
a) Photosynthesis
b) Nitrogen fixation
c) Condensation
d) Precipitation
11. How do plants contribute to the oxygen cycle?
a) By absorbing oxygen and producing carbon dioxide
b) By decomposing dead organisms
c) By producing oxygen through photosynthesis
d) By eating herbivores
12. What human activity increases carbon dioxide in the atmosphere?
a) Planting more trees
b) Using solar energy
c) Burning fossil fuels
d) Recycling materials
13. The nitrogen cycle is important because nitrogen is needed to build:
a) Water molecules
b) Carbohydrates
c) Proteins and DNA
d) Rocks and minerals
14. What organisms help convert nitrogen in the atmosphere into a usable form for plants?
a) Fungi
b) Bacteria
c) Insects
d) Fish
Module 2: Dynamic Ecosystems
Lesson 1: Resources in Ecosystems (Q15–20)
15. Which of the following is a biotic factor in an ecosystem?
a) Sunlight
b) Water
c) Soil
d) Trees
16. What is the right sequence of levels of organization in an environment?
a) Individual, community, population and Ecosystem
b) Individual, ecosystem, community and population
c) Individual, population, community and Ecosystem
d) Ecosystem, individual, population and community.
17. A population is:
a) a group of organisms that have similar traits
b) all the organisms that live in the same area at the same time.
c) is all the populations of different species that live together
d) None of the above.
18. Over population is:
a) when new species come to the new environment.
b) when population’s size grows so less that it causes damage to the environment
c) when population’s size grows so large that it causes damage to the environment
d) None of the above.
19. What happens when two species compete for the same limited resource?
a) They both thrive
b) One or both species may struggle or decline
c) They share resources equally
d) They stop interacting with the environment
20. What is carrying capacity?
a) The maximum number of species an ecosystem can support
b) The number of organisms a predator can eat
c) The total amount of nonrenewable resources in an area
d) The number of plants in a habitat
All the Best
Science Department
