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Class 10 Science Chapter Our Environment - Part 1

Class 10 Science Chapter Our Environment - Ecosystem and Its Components, Food Chains, Webs, and Energy Flow, Human Impact on the Environment. Notes, Test Series, Previous years question papers and man...

Class 10th
35 Questions
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Q1 • MCQ • 1 marks
All the living and non-living components around us form the:
Q3 • MCQ • 1 marks
The first trophic level in a food chain is occupied by:
Q4 • MCQ • 1 marks
Green plants are called producers because they:
Q5 • MCQ • 1 marks
If producers are removed from an ecosystem, what happens first?
Q6 • MCQ • 1 marks
Which organisms feed directly on producers?
Q7 • MCQ • 1 marks
The sequence of transfer of food energy is called:
Q8 • MCQ • 1 marks
A network of food chains is called:
Q9 • MCQ • 1 marks
Decomposers are mainly:
Q10 • MCQ • 1 marks
Which action would most effectively reduce biomagnification?
Q11 • MCQ • 1 marks
The 10% law was given by:
Q12 • MCQ • 1 marks
Energy flow in an ecosystem is:
Q13 • MCQ • 1 marks
Maximum energy is available at:
Q14 • MCQ • 1 marks
Organisms at the same feeding level are at the same:
Q15 • MCQ • 1 marks
Why are food chains usually limited to 3–5 trophic levels?
Q16 • MCQ • 1 marks
Grass → Deer → Tiger is an example of:
Q17 • MCQ • 1 marks
Secondary consumers are usually:
Q18 • MCQ • 1 marks
Energy decreases at each trophic level because:
Q19 • MCQ • 1 marks
The pyramid of energy is always:
Q20 • MCQ • 1 marks
Top carnivores receive about how much energy from producers?
Q21 • MCQ • 1 marks
Which organism is essential for maintaining nutrient balance in soil?
Q22 • MCQ • 1 marks
Which is NOT a biotic component?
Q23 • MCQ • 1 marks
The place where organisms live is called:
Q24 • MCQ • 1 marks
Sun is the ultimate source of:
Q25 • MCQ • 1 marks
Example of decomposer:
Q26 • MCQ • 1 marks
Which ecosystem is likely to have the most complex food web?
Q27 • MCQ • 1 marks
Substances broken down by microorganisms are:
Q28 • MCQ • 1 marks
Plastic is:
Q29 • MCQ • 1 marks
Accumulation of non-biodegradable substances causes:
Q30 • MCQ • 1 marks
DDT is an example of:
Q31 • MCQ • 1 marks
Biomagnification refers to:
Q32 • MCQ • 1 marks
Maximum biomagnification occurs at:
Q33 • MCQ • 1 marks
Which is biodegradable?
Q34 • MCQ • 1 marks
Which gas causes global warming?
Q35 • MCQ • 1 marks
Ozone layer protects us from:
Q36 • MCQ • 1 marks
Ozone depletion is mainly caused by:

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