Question 1
Our Environment · 2024
In Grass → Grasshopper → Frog → Snake → Hawk, the fourth trophic level contains 5 kJ. Using the 10% energy-transfer rule, find the producer-level energy.
Correct!
The answer is D, 5000 kJ.
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Our Environment questions for CBSE X
Lakshyank has 76 Our Environment questions for CBSE X. Try a few below, then practise the rest free.
Question 2
Our Environment
Which listed class is an ozone-depleting substance?
Correct!
The answer is B, Chlorofluorocarbons(CFCs).
Question 3
Our Environment
Why is a material termed non-biodegradable in the school context?
Correct!
The answer is D, Normal biological processes do not readily break it down.
Question 4
Our Environment
Grass receives10,000J of solar energy and stores1% as food energy. In a10%-transfer model,how much energy is available in deer that eat the grass?
Correct!
The answer is A, 10J.
Question 5
Our Environment
Which health risk can increase when ozone depletion allows more harmful UV to reach the surface?
Correct!
The answer is A, Skin cancer.
Question 6
Our Environment
Why is damage to the stratospheric ozone layer concerning?
Correct!
The answer is B, It weakens protection against harmful ultraviolet radiation.
Question 7
Our Environment
Why is energy flow through an ecosystem described as unidirectional?
Correct!
The answer is C, Energy moves through feeding relationships and dissipates as heat rather than cycling back as usable food energy.
Question 8
Our Environment
In a model where the same persistent pollutant biomagnifies at each feeding step,which chain has fewer steps before reaching humans?
Correct!
The answer is C, Edible plant→human.
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