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Curriculum-aligned learning paths for students in Classes 6-12.

CBSE
Class 8
Science
Curiosity
Our Home: Earth, a Unique Life...

Question Bank

Practice Hub

Question Bank: Our Home: Earth, a Unique Life Sustaining Planet

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Question Practice

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Question Bank - Our Home: Earth, a Unique Life Sustaining Planet

View all (117)
Q1.

What is the primary reason Earth can sustain life?

Single Answer MCQ
Q-00137850
View explanation
Q2.

What zone describes the range of distances where water can exist in liquid form?

Single Answer MCQ
Q-00137851
View explanation
Q3.

Why is Earth often referred to as the 'Blue Planet'?

Single Answer MCQ
Q-00137852
View explanation
Q4.

What would happen if Earth were closer to the Sun?

Single Answer MCQ
Q-00137853
View explanation
Q5.

What human activity can disrupt the balance of ecosystems on Earth?

Single Answer MCQ
Q-00137854
View explanation
Q6.

How did the Montreal Protocol contribute to environmental protection?

Single Answer MCQ
Q-00137855
View explanation
Q7.

What is the impact of greenhouse gas emissions on Earth?

Single Answer MCQ
Q-00137856
View explanation
Q8.

How does water's presence influence life on Earth?

Single Answer MCQ
Q-00137857
View explanation
Q9.

Why is Earth considered a vast living system?

Single Answer MCQ
Q-00137858
View explanation
Q10.

What is necessary to maintain Earth's ecological balance?

Single Answer MCQ
Q-00137859
View explanation
Q11.

Which factor is critical for the survival of the ozone layer?

Single Answer MCQ
Q-00137860
View explanation
Q12.

What role do satellite images play in understanding Earth's environment?

Single Answer MCQ
Q-00137861
View explanation
Q13.

In which international agreement was the commitment to limit global warming established?

Single Answer MCQ
Q-00137862
View explanation
Q14.

What is one reason Mars continues to excite scientific interest?

Single Answer MCQ
Q-00137863
View explanation
Q15.

How can small changes in an ecosystem affect life on Earth?

Single Answer MCQ
Q-00137864
View explanation
Q16.

Which planet is known as the 'Red Planet'?

Single Answer MCQ
Q-00137865
View explanation
Q17.

Which planet in our solar system has the thickest atmosphere?

Single Answer MCQ
Q-00137866
View explanation
Q18.

What is the primary reason Earth can support liquid water?

Single Answer MCQ
Q-00137867
View explanation
Q19.

Which planet is known for having the largest volcano in the solar system?

Single Answer MCQ
Q-00137868
View explanation
Q20.

What primarily distinguishes terrestrial planets from gas giants?

Single Answer MCQ
Q-00137869
View explanation
Q21.

Which gas is most prevalent in Venus's atmosphere?

Single Answer MCQ
Q-00137870
View explanation
Q22.

What effect does Earth’s ozone layer have?

Single Answer MCQ
Q-00137871
View explanation
Q23.

Which large planet is known for its prominent ring system?

Single Answer MCQ
Q-00137872
View explanation
Q24.

Which of the following planets has no atmosphere?

Single Answer MCQ
Q-00137873
View explanation
Q25.

Why is Venus hotter than Mercury despite being further from the Sun?

Single Answer MCQ
Q-00137874
View explanation
Q26.

Which planet is located at the edge of the solar system's habitable zone?

Single Answer MCQ
Q-00137875
View explanation
Q27.

Which planet has the shortest day?

Single Answer MCQ
Q-00137876
View explanation
Q28.

Which celestial body orbits the Earth?

Single Answer MCQ
Q-00137877
View explanation
Q29.

Which gas in Earth's atmosphere is essential for life?

Single Answer MCQ
Q-00137878
View explanation
Q30.

What is a significant effect of being in the habitable zone?

Single Answer MCQ
Q-00137879
View explanation
Q31.

What distinguishes gas giants from terrestrial planets?

Single Answer MCQ
Q-00137880
View explanation
Q32.

What is the primary reason Earth can support an atmosphere?

Single Answer MCQ
Q-00137881
View explanation
Q33.

What would happen if Earth were much smaller but had the same average density?

Single Answer MCQ
Q-00137882
View explanation
Q34.

What is a significant role of oxygen in Earth's atmosphere?

Single Answer MCQ
Q-00137883
View explanation
Q35.

How does Earth's size compare to Mars in relation to atmospheric capacity?

Single Answer MCQ
Q-00137884
View explanation
Q36.

What effect does the proper size of Earth have on human survival?

Single Answer MCQ
Q-00137885
View explanation
Q37.

What causes the Earth to have a magnetic field?

Single Answer MCQ
Q-00137886
View explanation
Q38.

Why is Mars notable in comparison to Earth regarding atmosphere?

Single Answer MCQ
Q-00137887
View explanation
Q39.

Which layer of Earth primarily affects its magnetic field?

Single Answer MCQ
Q-00137888
View explanation
Q40.

How does Earth's orbit contribute to its ability to sustain life?

Single Answer MCQ
Q-00137889
View explanation
Q41.

What is the main reason Earth is considered a unique planet for sustaining life?

Single Answer MCQ
Q-00137890
View explanation
Q42.

What would be the consequence of a much larger Earth?

Single Answer MCQ
Q-00137891
View explanation
Q43.

How does the Earth's atmosphere contribute to sustaining life?

Single Answer MCQ
Q-00137892
View explanation
Q44.

What characteristic makes Earth's atmosphere unique compared to that of Mercury?

Single Answer MCQ
Q-00137893
View explanation
Q45.

What role does the Earth's magnetic field play regarding cosmic rays and solar wind?

Single Answer MCQ
Q-00137894
View explanation
Q46.

What happens to oxygen in the atmosphere that benefits life on Earth?

Single Answer MCQ
Q-00137895
View explanation
Q47.

Which gas do plants take from the atmosphere for photosynthesis?

Single Answer MCQ
Q-00137896
View explanation
Q48.

If Earth were half its current size, which impact would most likely occur?

Single Answer MCQ
Q-00137897
View explanation
Q49.

What percentage of Earth's surface is covered by water?

Single Answer MCQ
Q-00137898
View explanation
Q50.

What major factor allows Earth to maintain a protective ozone layer?

Single Answer MCQ
Q-00137899
View explanation
Q51.

What is the primary effect of the greenhouse effect facilitated by Earth's atmosphere?

Single Answer MCQ
Q-00137900
View explanation
Q52.

How does the Earth’s size influence its climate stability?

Single Answer MCQ
Q-00137901
View explanation
Q53.

Which layer of Earth is primarily solid and responsible for supporting life?

Single Answer MCQ
Q-00137902
View explanation
Q54.

What is a consequence of poor atmospheric retention on Mars?

Single Answer MCQ
Q-00137903
View explanation
Q55.

How does water benefit animals in their biological processes?

Single Answer MCQ
Q-00137904
View explanation
Q56.

What natural resource is vital for photosynthesis in plants?

Single Answer MCQ
Q-00137905
View explanation
Q57.

What can happen if the Earth's atmosphere is weakened?

Single Answer MCQ
Q-00137906
View explanation
Q58.

When talking about life on Earth, what does 'hydrosphere' refer to?

Single Answer MCQ
Q-00137907
View explanation
Q59.

Which factor is NOT contributing to Earth being a life-sustaining planet?

Single Answer MCQ
Q-00137908
View explanation
Q60.

Why is it important for Earth to maintain a balance of gases in its atmosphere?

Single Answer MCQ
Q-00137909
View explanation
Q61.

What term describes the region around the Earth where magnetic forces can be detected?

Single Answer MCQ
Q-00137910
View explanation
Q62.

Which of the following is believed to primarily generate Earth’s magnetic field?

Single Answer MCQ
Q-00137911
View explanation
Q63.

How does Earth's magnetic field protect us from solar wind?

Single Answer MCQ
Q-00137912
View explanation
Q64.

What phenomenon occurs when charged particles from the solar wind interact with Earth’s magnetic field?

Single Answer MCQ
Q-00137913
View explanation
Q65.

Which layer of the Earth is crucial for supporting life?

Single Answer MCQ
Q-00137914
View explanation
Q66.

Which of the following best explains why a compass points north?

Single Answer MCQ
Q-00137915
View explanation
Q67.

What is the greenhouse effect?

Single Answer MCQ
Q-00137916
View explanation
Q68.

What is the main effect of the Earth’s magnetic field on cosmic rays?

Single Answer MCQ
Q-00137917
View explanation
Q69.

What gas is primarily responsible for the greenhouse effect on Earth?

Single Answer MCQ
Q-00137918
View explanation
Q70.

At which location within the Earth is the magnetic field the strongest?

Single Answer MCQ
Q-00137919
View explanation
Q71.

Why is water essential for life on Earth?

Single Answer MCQ
Q-00137920
View explanation
Q72.

What is the general direction of the magnetic field lines around Earth?

Single Answer MCQ
Q-00137921
View explanation
Q73.

Which of the following helps maintain Earth's atmosphere?

Single Answer MCQ
Q-00137922
View explanation
Q74.

Which natural phenomenon helps scientists study Earth's magnetic field?

Single Answer MCQ
Q-00137923
View explanation
Q75.

What unique condition allows diverse life on Earth compared to other planets?

Single Answer MCQ
Q-00137924
View explanation
Q76.

Why is the Earth considered a giant magnet?

Single Answer MCQ
Q-00137925
View explanation
Q77.

Which planet's atmosphere is mostly carbon dioxide, impacting its surface temperature significantly?

Single Answer MCQ
Q-00137926
View explanation
Q78.

What happens to a compass needle when brought close to a magnet?

Single Answer MCQ
Q-00137927
View explanation
Q79.

How does the Earth’s atmosphere support life?

Single Answer MCQ
Q-00137928
View explanation
Q80.

What constitutes the main source of risk from solar wind to Earth?

Single Answer MCQ
Q-00137929
View explanation
Q81.

What happens to life if Earth’s temperature rises significantly due to the greenhouse effect?

Single Answer MCQ
Q-00137930
View explanation
Q82.

What role does Earth's magnetic field play in preserving the ozone layer?

Single Answer MCQ
Q-00137931
View explanation
Q83.

Which element’s abundance in Earth’s crust makes it suitable for agriculture?

Single Answer MCQ
Q-00137932
View explanation
Q84.

What is a common misconception about the Earth's magnetic poles?

Single Answer MCQ
Q-00137933
View explanation
Q85.

Which of the following is a reason Earth can sustain life unlike many other planets?

Single Answer MCQ
Q-00137934
View explanation
Q86.

Which phenomenon prevents Earth's water from evaporating into space?

Single Answer MCQ
Q-00137935
View explanation
Q87.

In the context of sustaining life, what role does the soil play?

Single Answer MCQ
Q-00137936
View explanation
Q88.

Why do scientists consider Earth to be unique when compared to other planets?

Single Answer MCQ
Q-00137937
View explanation
Q89.

What effect does the Earth’s magnetic field have on life?

Single Answer MCQ
Q-00137938
View explanation
Q90.

What percentage of the Earth's surface is covered by water?

Single Answer MCQ
Q-00137939
View explanation
Q91.

Which layer of the Earth supports all known life?

Single Answer MCQ
Q-00137940
View explanation
Q92.

What process do plants use to convert sunlight into energy?

Single Answer MCQ
Q-00137942
View explanation
Q93.

What is the main gas that plants release during photosynthesis?

Single Answer MCQ
Q-00137944
View explanation
Q94.

What effect does the atmosphere have on Earth's temperature?

Single Answer MCQ
Q-00137946
View explanation
Q95.

What role does water play in regulating body temperature in animals?

Single Answer MCQ
Q-00137948
View explanation
Q96.

What are the components of the hydrosphere?

Single Answer MCQ
Q-00137950
View explanation
Q97.

Which nutrient is commonly found in soil and is essential for plant growth?

Single Answer MCQ
Q-00137952
View explanation
Q98.

What is a main factor that allows the Earth’s atmosphere to retain heat?

Single Answer MCQ
Q-00137954
View explanation
Q99.

What would happen to Earth's temperature without an atmosphere?

Single Answer MCQ
Q-00137956
View explanation
Q100.

How does soil support life on Earth?

Single Answer MCQ
Q-00137958
View explanation
Q101.

Which of the following interactions is essential for life processes on Earth?

Single Answer MCQ
Q-00137960
View explanation
Q102.

Which of the following is a key reason Earth is unique for life compared to other planets?

Single Answer MCQ
Q-00137962
View explanation
Q103.

What critical role does the Sun play in supporting life on Earth?

Single Answer MCQ
Q-00137964
View explanation
Q104.

The Earth’s crust is responsible for providing which of the following?

Single Answer MCQ
Q-00137966
View explanation
Q105.

Why is understanding the Earth's biosphere crucial for ecology?

Single Answer MCQ
Q-00137968
View explanation
Q106.

Which of the following is a major cause of habitat loss?

Single Answer MCQ
Q-00137970
View explanation
Q107.

What human activity contributes significantly to climate change?

Single Answer MCQ
Q-00137971
View explanation
Q108.

How does pollution impact biodiversity?

Single Answer MCQ
Q-00137972
View explanation
Q109.

Which of the following is a direct consequence of global warming?

Single Answer MCQ
Q-00137973
View explanation
Q110.

Which of the following can be considered an invasive species threat?

Single Answer MCQ
Q-00137974
View explanation
Q111.

What effect does overfishing have on marine ecosystems?

Single Answer MCQ
Q-00137975
View explanation
Q112.

Which practice is a solution to address soil degradation?

Single Answer MCQ
Q-00137976
View explanation
Q113.

What contributes to the depletion of the ozone layer?

Single Answer MCQ
Q-00137977
View explanation
Q114.

Which is a consequence of melting polar ice caps?

Single Answer MCQ
Q-00137978
View explanation
Q115.

How does urban air pollution primarily affect human health?

Single Answer MCQ
Q-00137979
View explanation
Q116.

Which of the following is a potential impact of deforestation?

Single Answer MCQ
Q-00137981
View explanation
Q117.

What is a significant environmental challenge posed by plastic waste?

Single Answer MCQ
Q-00137983
View explanation
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