ACME ACADEMY

WEEKLY EVALUATION TEST

Subject: Science
Time Limit: 20 Mins
Max Marks: 20 Marks
Student Name:
Roll Number:
Class / Sec:
Date:

GENERAL INSTRUCTIONS:

  1. All questions are compulsory. Carefully read all instructions before starting.
  2. The question paper contains 20 questions.
  3. There is no negative marking for incorrect answers.
  4. Use of mobile phones, smartwatches, or calculators is strictly prohibited during the exam.
1. Which of the following organisms form the first trophic level in all food chains?
[1 Mark]
(A) Herbivores
(B) Carnivores
(C) Producers
(D) Decomposers
2. According to the 10 percent law, if a plant captures 10,000 J of solar energy, how much energy is passed on to the primary consumer (herbivore)?
[1 Mark]
(A) 10,000 J
(B) 1000 J
(C) 100 J
(D) 10 J
3. The progressive accumulation of harmful non-biodegradable chemicals at each trophic level is known as:
[1 Mark]
(A) Biomagnification
(B) Bioremediation
(C) Eutrophication
(D) Ozone depletion
4. Ozone at the higher levels of the atmosphere is a product of UV radiation acting on which molecule?
[1 Mark]
(A) Carbon dioxide
(B) Oxygen (O2)
(C) Water vapour
(D) Nitrogen
5. Which synthetic chemicals are primarily responsible for the depletion of the ozone layer?
[1 Mark]
(A) Chlorofluorocarbons (CFCs)
(B) Methane
(C) Carbon dioxide
(D) Sulphur dioxide
6. Decomposers in an ecosystem play a critical role because they:
[1 Mark]
(A) Produce food for carnivores.
(B) Absorb solar energy directly.
(C) Break down complex organic substances into simple inorganic materials that can be reused by plants.
(D) Kill harmful bacteria.
7. Which of the following is an abiotic component of an ecosystem?
[1 Mark]
(A) Plants
(B) Animals
(C) Temperature
(D) Fungi
8. Food chains generally consist of only 3 or 4 steps because:
[1 Mark]
(A) There are not enough animals in the world.
(B) The loss of energy at each step is so great that very little usable energy remains after four trophic levels.
(C) Animals at higher levels do not get hungry.
(D) Producers stop making food.
9. Which of the following constitutes a complete, natural food chain?
[1 Mark]
(A) Grass, wheat and mango
(B) Grass, goat and human
(C) Goat, cow and elephant
(D) Grass, fish and goat
10. A network of interconnected food chains in an ecosystem is known as a:
[1 Mark]
(A) Food pyramid
(B) Energy web
(C) Food web
(D) Trophic network
11. Which of the following is a completely biodegradable waste?
[1 Mark]
(A) Polythene bags
(B) Glass bottles
(C) Vegetable peels
(D) Aluminium foil
12. The flow of energy in an ecosystem is always:
[1 Mark]
(A) Bidirectional
(B) Unidirectional
(C) Cyclic
(D) Random
13. What is the primary function of the ozone layer in the stratosphere?
[1 Mark]
(A) It provides extra oxygen for respiration.
(B) It prevents meteorites from hitting the Earth.
(C) It absorbs harmful ultraviolet (UV) radiations from the Sun.
(D) It traps heat to keep the Earth warm.
14. In an aquarium, why is it necessary to clean the tank regularly, unlike natural ponds or lakes?
[1 Mark]
(A) Because aquariums don't have water.
(B) Because an aquarium is an artificial ecosystem that often lacks a complete natural set of decomposers to recycle waste.
(C) Because fish in aquariums eat more.
(D) Because glass gets dirty easily.
15. If a grasshopper is eaten by a frog, the energy transfer will be from:
[1 Mark]
(A) Producer to primary consumer
(B) Primary consumer to secondary consumer
(C) Secondary consumer to primary consumer
(D) Secondary consumer to tertiary consumer
16. In a forest ecosystem, which organisms represent the top carnivores?
[1 Mark]
(A) Deer and Rabbits
(B) Trees and Shrubs
(C) Lions and Tigers
(D) Insects and Worms
17. What percentage of solar energy falling on leaves is converted into food energy by terrestrial plants?
[1 Mark]
(A) 10%
(B) 1%
(C) 50%
(D) 100%
18. The United Nations Environment Programme (UNEP) forged an agreement in 1987 to freeze CFC production. What is this famous protocol known as?
[1 Mark]
(A) Kyoto Protocol
(B) Paris Agreement
(C) Montreal Protocol
(D) Geneva Convention
19. Which lifestyle change is the most effective for reducing non-biodegradable waste generation?
[1 Mark]
(A) Burning plastic instead of throwing it
(B) Using single-use plastic cups
(C) Following the 'Refuse, Reduce, Reuse, Repurpose, Recycle' principles
(D) Burying all waste deep underground
20. An ecosystem includes:
[1 Mark]
(A) Only living organisms.
(B) Only non-living objects.
(C) Both living organisms and non-living objects interacting together.
(D) Only plants and animals.
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