Earth is not just a planet with land, water, and air. It works as a complete system where different parts like the atmosphere, hydrosphere, geosphere, biosphere, and cryosphere continuously interact with each other. To understand these connections better, students need regular written practice along with learning concepts.
This Class 9 Science Chapter 13 Earth as a System: Energy, Matter and Life Worksheet with Answers PDF helps students revise important topics and improve their answer-writing skills. The worksheet includes short answer questions, long answer questions, diagram-based practice, and competency-based questions prepared according to the CBSE Board learning approach.
Students can use these Worksheets for school exams, revision, and self-practice. More Class 9 Worksheets help learners strengthen their understanding across different subjects, while chapter-wise Class 9 Science Worksheets provide focused practice for Science concepts.
Solving this worksheet will help students understand how energy, matter, and living organisms are connected in maintaining Earth's natural balance.
Download Class 9 Earth as a System: Energy, Matter and Life Worksheet PDF with Answers
Students can download the Class 9 Science Chapter 13 Earth as a System: Energy, Matter and Life Worksheet PDF to practice questions anytime. This printable worksheet is designed to improve conceptual understanding and prepare students for CBSE Science examinations.
The worksheet covers:
- Earth's major systems and their interactions
- Role of atmosphere and solar energy
- Greenhouse effect
- Movement of matter through cycles
- Nitrogen cycle
- Relationship between climate and living organisms
- Human impact on Earth systems
Download Free Class 9 Science Chapter 13 Earth as a System Worksheet PDF with Answers
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Class 9 Earth as a System: Energy, Matter and Life Worksheet Questions
Section A: Very Short Answer Questions
Q1. Name the five major systems of Earth.
Q2. Which layer of Earth's system contains all living organisms?
Q3. What is the main source of energy for Earth's systems?
Q4. Define the term biosphere.
Q5. Name two greenhouse gases present in the atmosphere.
Q6. Which sphere of Earth includes oceans, rivers, lakes, and groundwater?
Q7. What is meant by the cryosphere?
Q8. Name the process through which plants absorb nitrogen compounds from soil.
Q9. What type of radiation is responsible for warming Earth's surface?
Q10. Why is the ozone layer important for life on Earth?
Section B: Short Answer Questions
Q11. Explain how Earth behaves as an interconnected system.
Q12. Differentiate between the atmosphere and hydrosphere.
Q13. How does the Sun provide energy to different Earth systems?
Q14. Explain the role of the greenhouse effect in maintaining Earth's temperature.
Q15. What will happen if greenhouse gases are completely removed from the atmosphere?
Q16. Explain the difference between ultraviolet radiation and infrared radiation.
Q17. How are the biosphere and atmosphere dependent on each other?
Q18. Describe the importance of the geosphere in supporting life.
Section C: Diagram-Based Questions
Q19. Draw a labelled diagram showing interactions between Earth's major spheres.
Q20. Draw and explain the steps involved in the nitrogen cycle.
Q21. Represent the greenhouse effect with the help of a simple diagram.
Q22. Draw a flow chart showing the movement of matter between living and non-living components.
Section D: Long Answer Questions
Q23. Explain the role of atmosphere, hydrosphere, geosphere, biosphere, and cryosphere in maintaining Earth's balance.
Q24. Describe the major steps of the nitrogen cycle with suitable examples.
Q25. How does melting of glaciers affect different systems of Earth? Explain.
Q26. Explain how energy from the Sun reaches Earth and affects different natural processes.
Q27. How do changes in one Earth system create effects in other systems? Give an example.
Section E: Competency-Based Questions
Q28. A mountain region experiences rapid melting of glaciers due to increasing temperature. Explain how this change can affect water bodies, climate, and living organisms.
Q29. Increasing ocean temperature can influence rainfall patterns. Explain the connection between the hydrosphere and atmosphere in this situation.
Q30. Human activities are increasing the amount of carbon dioxide in the atmosphere. Describe its possible effects on Earth systems.
Q31. Plants, animals, soil, and atmosphere are connected through the nitrogen cycle. Explain this relationship.
Q32. Why is maintaining balance between different Earth systems important for survival of life?
Class 9 Earth as a System Energy Matter and Life Worksheet Answer Key with Solutions
Section A: Very Short Answer Questions
1. The five major systems of Earth are:
- Atmosphere
- Hydrosphere
- Geosphere
- Biosphere
- Cryosphere
These systems interact with each other and help maintain balance on Earth.
2. The biosphere is the layer of Earth that contains all living organisms, including plants, animals, humans, and microorganisms.
3. The Sun is the main source of energy for Earth's systems. Solar energy supports processes like photosynthesis, weather changes, and the water cycle.
4. The biosphere is the part of Earth where living organisms exist and interact with other Earth systems like air, water, and land.
5. Two greenhouse gases present in the atmosphere are:
Carbon dioxide (CO₂)
Methane (CH₄)
These gases help trap heat and maintain Earth's temperature.
6. The hydrosphere includes all water present on Earth, such as oceans, rivers, lakes, glaciers, and groundwater.
7. The cryosphere refers to the frozen water parts of Earth, including glaciers, ice caps, snow-covered areas, and sea ice.
8. The process through which plants absorb nitrogen compounds from soil is called assimilation.
9. Infrared radiation (IR) is mainly responsible for warming Earth's surface by transferring heat energy.
10. The ozone layer protects life on Earth by absorbing harmful ultraviolet (UV) radiation from the Sun.
Section B: Short Answer Questions
11. Earth behaves as an interconnected system because its different components continuously exchange energy and matter. The atmosphere, hydrosphere, geosphere, biosphere, and cryosphere depend on each other.
For example, plants from the biosphere use carbon dioxide from the atmosphere and water from the hydrosphere for photosynthesis.
12. The atmosphere is the layer of gases surrounding Earth, while the hydrosphere includes all water present on Earth.
The atmosphere controls weather and climate, whereas the hydrosphere provides water needed by living organisms.
13. The Sun provides energy that controls many natural processes on Earth. Solar energy helps in:
- Heating Earth's surface
- Driving winds and weather patterns
- Supporting photosynthesis in plants
- Maintaining the water cycle
14. The greenhouse effect is the process in which gases in Earth's atmosphere trap heat and keep the planet warm.
Greenhouse gases like carbon dioxide and methane absorb heat energy and maintain a suitable temperature for life.
15. If greenhouse gases were completely removed from the atmosphere, Earth would lose most of its heat into space. The temperature would become extremely cold, making survival difficult for living organisms.
16. Ultraviolet (UV) radiation and infrared (IR) radiation are different forms of energy from the Sun.
UV radiation has high energy and can damage living cells. Most harmful UV rays are absorbed by the ozone layer.
Infrared radiation carries heat energy and helps warm Earth's surface.
17. The biosphere and atmosphere depend on each other through the exchange of gases.
Plants take carbon dioxide from the atmosphere during photosynthesis and release oxygen. Animals use this oxygen for respiration and release carbon dioxide back into the atmosphere.
18. The geosphere supports life by providing land, minerals, soil, and nutrients. Plants grow in soil, and many organisms depend on landforms and minerals provided by the geosphere.
Section C: Diagram-Based Questions
19. A correct diagram should show interactions among the five major Earth systems:
- Atmosphere (air and gases)
- Hydrosphere (water bodies)
- Geosphere (rocks, soil, land)
- Biosphere (living organisms)
- Cryosphere (ice and frozen water)
The diagram should explain that these systems exchange energy and matter to maintain Earth's balance.
20. The nitrogen cycle diagram should include the following steps:
Nitrogen Fixation:
Atmospheric nitrogen is converted into ammonia by bacteria like Rhizobium.
Nitrification:
Ammonia is converted into nitrites and nitrates by nitrifying bacteria.
Assimilation:
Plants absorb nitrates from the soil and use them for growth.
Ammonification:
Decomposers convert dead organisms and waste materials into ammonia.
Denitrification:
Bacteria convert nitrates back into atmospheric nitrogen.
21. A greenhouse effect diagram should show:
- Sunlight entering Earth's atmosphere
- Earth's surface absorbing solar energy
- Heat being released as infrared radiation
- Greenhouse gases trapping some heat
- Some heat escaping back into space
This process keeps Earth warm enough to support life.
22. The flow chart should show that matter continuously moves between living and non-living components.
Correct sequence:
Atmosphere → Plants → Animals → Decomposers → Soil → Atmosphere
This movement helps recycle important nutrients required for life.
Section D: Long Answer Questions
23. Earth's systems work together to maintain natural balance:
Atmosphere: Provides gases, controls climate, and protects Earth from harmful radiation.
Hydrosphere: Includes water bodies that support life and regulate temperature.
Geosphere: Provides land, minerals, rocks, and soil.
Biosphere: Includes all living organisms that interact with other systems.
Cryosphere: Stores frozen water and influences climate.
A change in one system can affect all other systems because they are connected.
24. The nitrogen cycle is the movement of nitrogen between the atmosphere, soil, and living organisms.
The main steps are:
Nitrogen Fixation:
Nitrogen gas from the atmosphere is converted into ammonia by nitrogen-fixing bacteria.
Nitrification:
Bacteria convert ammonia into nitrites and nitrates.
Assimilation:
Plants absorb nitrates from soil and use them to make proteins.
Ammonification:
Decomposers break down dead organisms and release ammonia.
Denitrification:
Bacteria convert nitrates back into nitrogen gas, which returns to the atmosphere.
25. Melting glaciers affect several Earth systems:
- Cryosphere loses frozen water due to rising temperature.
- Hydrosphere is affected because melted ice increases sea levels.
- Biosphere is affected as habitats of many organisms change.
- Atmosphere changes because temperature and weather patterns are influenced.
This shows that all Earth systems are connected.
26. Energy from the Sun reaches Earth in the form of solar radiation.
Solar energy:
- Warms Earth's surface
- Controls climate and weather
- Supports photosynthesis
- Helps evaporation and the water cycle
- Provides energy required for ecosystems
Without solar energy, life processes on Earth would not continue.
27. A change in one Earth system can affect other systems because they are interconnected.
Example:
If the cryosphere warms and glaciers melt:
Water levels increase in the hydrosphere
Habitats in the biosphere change
Weather patterns in the atmosphere are affected
This creates changes throughout the Earth system.
Section E: Competency-Based Questions
28. Rapid melting of glaciers affects different Earth systems.
When glaciers melt, the cryosphere loses ice. The extra water enters oceans and affects the hydrosphere by increasing sea levels.
Changes in water and temperature influence the atmosphere by changing climate patterns. The biosphere is also affected because plants and animals may lose their natural habitats.
29. Increasing ocean temperature affects rainfall because the hydrosphere and atmosphere are connected.
Warmer oceans increase evaporation, adding more water vapour into the atmosphere. This can change rainfall patterns, create stronger storms, and affect climate conditions.
30. Increasing carbon dioxide due to human activities strengthens the greenhouse effect.
- Possible effects include:
- Rise in Earth's temperature
- Melting of glaciers
- Climate changes
- Changes in rainfall patterns
- Impact on plants and animals
This affects the balance between different Earth systems.
31. Plants, animals, soil, and atmosphere are connected through the nitrogen cycle.
Bacteria convert atmospheric nitrogen into useful forms. Plants absorb nitrogen compounds from soil. Animals get nitrogen by eating plants.
When organisms die, decomposers return nitrogen compounds to the soil, and denitrifying bacteria release nitrogen back into the atmosphere.
32. Maintaining balance between Earth systems is important because all living organisms depend on these interactions.
The exchange of energy and matter between atmosphere, hydrosphere, geosphere, biosphere, and cryosphere keeps Earth suitable for life.
Disturbance in one system can create problems for climate, ecosystems, and living organisms.
Concepts Covered in Earth as a System Energy Matter and Life Worksheet
This Class 9 Science worksheet covers the following important concepts:
- Earth as an interconnected system
- Interaction between different Earth spheres
- Atmosphere and its importance
- Hydrosphere and water distribution
- Geosphere and land components
- Biosphere and living organisms
- Cryosphere and frozen water systems
- Solar energy and radiation
- Greenhouse effect
- Climate balance
- Matter movement in ecosystems
- Nitrogen cycle and microorganisms
- Human influence on natural systems
Learning Outcomes After Solving Earth as a System: Energy, Matter and Life Worksheet
After completing the Class 9 Science Chapter 13 Earth as a System: Energy, Matter and Life Worksheet, students will be able to:
- Understand how different Earth systems interact with each other
- Explain the role of energy and matter in maintaining natural balance
- Identify relationships between living and non-living components
- Improve Science answer-writing skills
- Understand environmental changes through real-life examples
- Explain important processes like the nitrogen cycle and greenhouse effect
- Prepare effectively for CBSE Science exams
