Environmental Science MCQ Quiz
Ecosystem (Q1–Q25)
Q1. Ecosystem consists of:
A) Living only
B) Non-living only
C) Both
D) None
Q2. Producer example:
A) Plant
B) Lion
C) Human
D) Bacteria
Q3. Consumer:
A) Plants
B) Animals
C) Soil
D) Water
Q4. Decomposers:
A) Plants
B) Animals
C) Bacteria
D) Sun
Q5. Food chain shows:
A) Energy flow
B) Water flow
C) Air flow
D) None
Pollution (Q26–Q50)
Q26. Air pollution cause:
A) Vehicles
B) Factories
C) Burning
D) All
Q27. Water pollution:
A) Industrial waste
B) Sewage
C) Chemicals
D) All
Q28. Noise pollution unit:
A) Watt
B) Decibel
C) Volt
D) Ampere
Q29. Soil pollution caused by:
A) Fertilizers
B) Pesticides
C) Waste
D) All
Climate Change (Q51–Q75)
Q51. Global warming due to:
A) CO₂
B) O₂
C) N₂
D) H₂
Q52. Greenhouse gases:
A) CO₂
B) CH₄
C) N₂O
D) All
Q53. Ozone layer protects from:
A) Heat
B) UV rays
C) Rain
D) Wind
Renewable Energy (Q76–Q100)
Q76. Solar energy source:
A) Sun
B) Wind
C) Water
D) Coal
Q77. Wind energy uses:
A) Turbines
B) Panels
C) Batteries
D) Engines
Q78. Hydro energy:
A) Water
B) Air
C) Soil
D) Fire
Q79. Biomass energy from:
A) Plants
B) Animals
C) Waste
D) All
Q80. Geothermal energy comes from:
A) Sun
B) Earth heat
C) Wind
D) Water
Q81. Tidal energy comes from:
A) Wind
B) Ocean tides
C) Sun
D) Soil
Q82. Renewable energy is:
A) Limited
B) Non-reusable
C) Replenishable
D) Exhaustible
Q83. Non-renewable source:
A) Solar
B) Wind
C) Coal
D) Hydro
Q84. Major greenhouse gas:
A) Oxygen
B) Nitrogen
C) Carbon dioxide
D) Helium
Q85. Climate change affects:
A) Temperature
B) Rainfall
C) Sea level
D) All
Q86. Acid rain caused by:
A) CO₂
B) SO₂
C) O₂
D) H₂
Q87. Smog is:
A) Smoke + Fog
B) Dust + Air
C) Water + Air
D) None
Q88. Ozone depletion leads to:
A) Less UV
B) More UV
C) No change
D) Cooling
Q89. Recycling helps:
A) Increase waste
B) Reduce waste
C) Pollution increase
D) None
Q90. 3Rs stand for:
A) Reduce, Reuse, Recycle
B) Read, Run, Repeat
C) Reduce, Run, Repair
D) None
Q91. Biodiversity means:
A) Same species
B) Variety of life
C) Water cycle
D) Air cycle
Q92. Deforestation causes:
A) Cooling
B) Global warming
C) Rainfall increase
D) None
Q93. Afforestation means:
A) Cutting trees
B) Planting trees
C) Burning trees
D) Drying trees
Q94. Solar panel converts:
A) Heat to sound
B) Sunlight to electricity
C) Wind to energy
D) Water to heat
Q95. Windmill produces:
A) Heat
B) Electricity
C) Water
D) Sound
Q96. Hydroelectric power uses:
A) Wind
B) Water flow
C) Coal
D) Gas
Q97. Biomass includes:
A) Plants
B) Animal waste
C) Organic waste
D) All
Q98. Geothermal energy is:
A) From sun
B) From earth heat
C) From wind
D) From water
Q99. Pollution control helps:
A) Increase damage
B) Protect environment
C) Waste resources
D) None
Q100. Sustainable development means:
A) Overuse resources
B) Use resources wisely
C) Waste resources
D) None