Extra Questions for Chapter 1 The Ever-Evolving World of Science Class 7 Science Curiosity
Class 7 Science The Ever-Evolving World of Science Extra Questions
Very Short Answer Questions
Question 1. What is the shape of the Earth’s orbit around the Sun?
Answer
The Earth moves around the Sun in a nearly circular path called an orbit.
Question 2. What is the duration of the Earth’s revolution around the Sun?
Answer
It takes the Earth one whole year (365 days) to complete one trip around the Sun.
Question 3. What does the tilt of the Earth’s axis cause?
Answer
The tilt makes different parts of Earth get sunlight differently, creating seasons.
Question 4. What can be explored with electric batteries, lamps, and wires?
Answer
These tools help us study how electricity works and flows.
Question 5. What happens to materials when they are heated?
Answer
Heating can make materials change their shape, size, or state.
Question 6. What is one example of an irreversible change?
Answer
Once a battery is used up, it cannot be changed back to new again.
Question 7. How does water flow in the environment?
Answer
Water moves below the ground through soil and rocks.
Question 8. What are life processes essential for survival?
Answer
Eating gives energy needed for all life activities.
Question 9. Do plants also need food to grow?
Answer
Plants make their own food using sunlight to grow healthy.
Question 10. What was the way early humans measured time?
Answer
They used the length and position of shadows to tell the time.
Question 11. Why is light important for us?
Answer
Light helps our eyes see things around us.
Question 12. What causes eclipses?
Answer
Eclipses happen when one object’s shadow falls on another.
Question 13. How does the Earth rotate to cause day and night?
Answer
Earth spins around its axis, making day and night.
Question 14. How does the Earth’s movement around the Sun affect us?
Answer
As Earth moves around the Sun, the tilt causes different seasons.
Question 15. What happens during a solar eclipse?
Answer
The Moon blocks the Sun’s light, causing a solar eclipse.
Question 16. What is a lunar eclipse?
Answer
The Earth’s shadow falls on the Moon, causing a lunar eclipse.
Question 17. Can we safely view a lunar eclipse with our naked eye?
Answer
Lunar eclipses are safe to watch without special glasses.
Question 18. What causes the stars to appear to move in the sky?
Answer
Earth’s spinning makes stars seem like they move across the sky.
Short Answer Questions
Question 1. Explain how science is a continuous process of discovery.
Answer
Science is ongoing because every discovery leads to new questions and experiments. It never stops as we keep exploring deeper into nature.
Question 2. What is the difference between reversible and irreversible changes?
Answer
Reversible changes can be undone and return to their original form, like ice melting and then freezing again. Irreversible changes cannot be undone, like a fruit ripening or a battery running out of power.
Question 3. Why is it important to step outside the classroom to learn science?
Answer
Experiencing the world through activities and experiments helps us understand science better than just reading, making learning hands-on and meaningful.
Question 4. How do human activities link to environmental challenges?
Answer
Human actions affect nature and society, and science helps us understand this connection to work toward a sustainable future.
Question 5. What role do light and shadows play in our daily life and in science?
Answer
Light and shadows help us see, tell time, and explain natural phenomena like eclipses and day-night cycles.
Question 6. What is the main goal of the science journey?
Answer
The main goal is to explore the world of science through curiosity, experiments, and asking deeper questions to understand the natural world and our place in it.
Question 7. What is the process of scientific exploration?
Answer
Science is a process of discovery that involves questioning, experimenting, and learning from the patterns in nature. It encourages curiosity and hands-on activities.
Question 8. How are light and shadows important in understanding the universe?
Answer
Light and shadows help us understand the movement of celestial bodies like the Earth and Moon, and phenomena like eclipses, day, and night, which are influenced by the Earth’s rotation and its orbit around the Sun.
Question 9. What is the significance of conducting hands-on experiments in science?
Answer
Conducting hands-on experiments is significant because it allows students to directly engage with scientific concepts, test theories, and observe outcomes, fostering a deeper and more practical understanding of the material.
Question 10. How does science encourage responsibility towards the environment?
Answer
Science encourages environmental responsibility by revealing how human activities affect nature. It provides knowledge to address challenges like pollution or resource depletion, promoting sustainable practices for a healthier planet.
Question 11. Why is it important to ask questions in science?
Answer
Asking questions is essential because it leads to exploration, discovery, and deeper understanding. Great scientists often ask amazing questions that drive their research and findings.
Question 12. How can we use science to address environmental challenges?
Answer
Science can help us understand environmental issues and offer solutions, such as addressing sustainability, reducing pollution, and conserving natural resources through responsible human actions.
Question 13. Describe the role of observation in scientific exploration.
Answer
Observation in scientific exploration involves carefully noting details about the world, which forms the basis for questions and forms theory. It helps scientists identify patterns or anomalies, guiding experiments and leading to reliable conclusions.
Question 14. How does science help us understand changes in the environment? (2 Mark)
Answer
Science helps us understand environmental changes by studying processes like material transformations, heat flow, or water cycles. It provides insights into how these changes occur and their impact on the natural world, aiding in environmental awareness.
Question 15. What does the textbook suggest about using experiments in science?
Answer
The textbook encourages conducting experiments to explore and test ideas, fostering a deeper understanding of concepts and the natural world. Experiments help scientists verify their theories and observe new phenomena.
Question 16. What is the significance of time measurement in scientific exploration?
Answer
Time measurement is crucial in science as it helps in understanding the passage of time and the speed at which events occur, such as how fast something happens, which is important in studying various processes in nature.
Question 17. How are the properties of materials explored in the textbook?
Answer
The textbook explores the properties of materials like malleability, ductility, and conductivity through activities and experiments to understand how different materials behave under various conditions.
Question 18. What can we learn from the design of paper planes, as mentioned in the text?
Answer
The design of paper planes inspired real scientific studies on flight and aerodynamics, showcasing how simple observations and experiments can lead to significant discoveries in science.
Question 19. Explain how science connects different fields of study.
Answer
Science connects fields like physics, chemistry, biology, and earth sciences by showing how ideas in one area can inspire or explain discoveries in another. For example, understanding material properties in chemistry can help explain biological processes or physical phenomena, creating a unified approach to studying the world.
Question 20. Why is it important to ask questions in science?
Answer
Asking questions in science sparks curiosity and drives investigation. It helps identify problems and guide experiments, leading to new discoveries and a deeper understanding of natural phenomena.
Long Answer Questions
Question 1. Discuss the importance of interconnectedness between different scientific disciplines.
Answer
- The textbook stresses that scientific fields are interconnected.
- Discoveries in one area often inspire new questions or breakthroughs in another.
- For example, understanding the principles of physics can lead to advancements in engineering and technology, while biological studies can inform ecological solutions.
- This interconnectedness allows students to see science as a holistic discipline, where advancements in one field can benefit others and provide comprehensive insights into the natural world.
Question 2. Explain why science is considered both a process and a way of thinking.
Answer
- Science is not just a collection of facts but a continuous process of asking questions and seeking answers.
- It involves curiosity, experiments, observations, and logical reasoning.
- Scientists observe patterns in nature and try to understand why and how things happen.
- This method of thinking encourages openness to new ideas and revising old ones based on evidence.
- Hence, science helps us develop critical thinking and problem-solving skills.
Question 3. Why is hands-on learning through experiments and activities emphasized in science education?
Answer
- Experiments help students experience scientific concepts practically rather than just reading theory.
- Hands-on learning develops observation, analysis, and critical thinking skills.
- It allows learners to see results firsthand and understand cause-effect relationships.
- Such activities spark curiosity and make learning enjoyable and memorable.
- They also prepare students to think like scientists and solve real-world problems.
Question 4. Discuss the role of science in addressing environmental challenges and promoting sustainability.
Answer
- Science helps us understand how human activities impact the environment.
- It provides tools and knowledge to reduce pollution and conserve natural resources.
- Through science, we can develop renewable energy, waste management, and eco-friendly technologies.
- It raises awareness about climate change and biodiversity loss.
- Ultimately, science guides us toward creating a sustainable and balanced relationship with nature.
Question 5. Explain the role of time measurement and its importance in scientific experiments.
Answer
- Time measurement is vital in scientific experiments because it helps in quantifying and comparing the duration and speed of different processes.
- Whether studying chemical reactions, the growth of plants, or the movement of celestial bodies, understanding time allows scientists to analyze how quickly or slowly something happens, providing essential data for their studies.
- Accurate timekeeping is also crucial in fields like physics and astronomy, where precise measurements are needed to test hypotheses and validate theories.
Question 7. Describe how different fields of science are interconnected and why this is important.
Answer
- Fields like physics, chemistry, biology, and earth sciences often overlap in their studies.
- For example, biology uses chemistry to understand life processes, while earth science involves physics to explain natural phenomena.
- Discoveries in one field can lead to questions and new findings in others.
- This interconnectedness helps provide a more complete understanding of the world.
It encourages collaborative learning and innovation across disciplines.
Question 8. Discuss how studying natural phenomena can lead to practical applications.
Answer
- Studying natural phenomena leads to practical applications by providing insights into how the world works, which can be applied to solve real-world problems.
- For instance, observing heat flow can improve energy-efficient technologies, while understanding material properties can lead to better construction materials.
- These studies enable innovations in fields like medicine, engineering, and environmental management, enhancing daily life and sustainability.
Question 9. How does science contribute to creating a sustainable world, and why is this important?
Answer
- Science contributes to a sustainable world by studying environmental processes, such as water cycles or material changes, to understand human impacts on nature.
- It develops solutions like eco-friendly technologies, waste reduction methods, and renewable energy sources to address challenges like climate change.
- This is important because sustainability ensures resources are preserved for future generations, maintains ecological balance, and supports human well-being.
By fostering responsibility through scientific knowledge, we can make informed decisions to protect our planet.
Question 10. How do light and shadows help us understand time and natural phenomena like eclipses?
Answer
- Early humans used the length and position of shadows cast by the Sun to measure time during the day.
- Light enables us to see objects, and shadows show the shape and position of these objects.
- The Earth and Moon cast shadows that cause eclipses, which are important astronomical events.
- Studying light and shadows helps explain day and night cycles caused by Earth’s rotation.
- This understanding connects everyday experiences with larger cosmic events.
Question 11. How do light and shadows help us understand celestial phenomena?
Answer
 |
| Celestial Phenomena |
- Light and shadows are fundamental in understanding celestial phenomena like day and night, as well as eclipses.
- The Earth’s rotation causes day and night by exposing different parts of the planet to sunlight.
- The phenomenon of eclipses occurs when the Earth and the Moon cast shadows due to their positions in relation to the Sun.
- By studying the movement of light and shadows, scientists can understand the patterns of celestial bodies and predict occurrences such as eclipses, further enhancing our knowledge of the universe.
Question 12. What is the significance of scientific questioning in the process of discovery?
Answer
- Asking questions is central to the process of discovery.
- Scientists don’t just focus on answering questions—they ask new ones that challenge existing knowledge and open up new avenues of research.
- This process of questioning leads to deeper understanding and helps in refining theories or discovering new phenomena.
- For example, the question “Why do things work the way they do?” leads to scientific inquiry, exploration, and ultimately, the expansion of knowledge.
Question 13. Explain why science is described as a process rather than just a collection of facts.
Answer
- Science is a process because it involves a systematic way of thinking that includes observing, questioning, experimenting, and analyzing.
- Unlike a static collection of facts, science is dynamic, encouraging continuous exploration and refinement of knowledge.
- This process allows scientists to adapt to new findings, ensuring that science evolves with new discoveries and remains relevant to understanding the world.
Question 14. Why is it important for science to involve hands-on activities and experiments?
Answer
- Hands-on activities and experiments are vital in science because they make abstract concepts tangible and foster deeper understanding.
- They allow students to test ideas, observe outcomes, and learn from real-world evidence, reinforcing scientific principles.
Such activities also encourage critical thinking and curiosity, helping students connect theoretical knowledge to practical applications and develop a scientific mindset.