Unit Test (Solution): The Ever-Evolving World of Science | Science (Curiosity) Class 7 - New NCERT PDF Download

Maximum Marks: 30
Attempt all questions

• Question numbers 1 to 7 carry 1 mark each.
• Question numbers 8 to 12 carry 2 marks each.
• Question numbers 13 to 15 carry 3 marks each.
• Question numbers 16 carry  4 marks each.

Q1: What is the main purpose of science in understanding the world? (1 Mark)
(i) To memorise facts
(ii) To explore and question
(iii) To avoid experiments
(iv) To limit curiosity
Ans: (ii) To explore and question

Science is “an invitation to question, to perform experiments, and to explore.”

Q2: The study of science includes which of the following? (1 Mark)
(i) Only biology
(ii) Only chemistry
(iii) All fields like physics, chemistry, and biology
(iv) Only earth sciences
Ans: (iii) All fields like physics, chemistry, and biology

Science encompasses various fields, all interconnected, to study the world comprehensively.

Q3: Which quality drives scientific discovery? (1 Mark)
(i) Ignoring observations
(ii) Curiosity
(iii) Avoiding questions
(iv) Memorising answers
Ans: (ii) Curiosity

Curiosity motivates scientists to ask questions and seek new knowledge.

Q4: What does science help us understand about the natural world? (1 Mark)
Ans: Science helps us understand the natural world by observing patterns, conducting experiments, and analyzing how things work, leading to discoveries about our environment.

Q5: What is the role of experiments in science? (1 Mark)
(i) To confirm guesses without evidence
(ii) To try things out and explore ideas
(iii) To avoid new findings
(iv) To memorise theories
Ans: (ii) To try things out and explore ideas

Science says, step out... and experience the world through activities and experiments.

Q6: The process of science involves asking questions, observing, and __________. (1 Mark)
Ans: experimenting

The scientific process includes questioning, observing, and experimenting to gain knowledge.

Q7: Why is science considered an ongoing process? (1 Mark)
(i) It stops after one discovery
(ii) It continuously seeks new knowledge
(iii) It avoids new questions
(iv) It relies only on old facts
Ans: (ii) It continuously seeks new knowledge

Science is ongoing as it constantly builds on new observations and questions.

Q8: Explain how science connects different fields of study. (2 Mark)
Ans: 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.

Q9: Why is it important to ask questions in science? (2 Mark)
Ans: 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.

Q10: How does science help us understand changes in the environment? (2 Mark)
Ans: 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.

Q11: Describe the role of observation in scientific exploration. (2 Mark)
Ans: 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.

Q12: How does science encourage responsibility towards the environment? (2 Mark)
Ans: 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.

Q13: Explain why science is described as a process rather than just a collection of facts. (3 Mark)
Ans: 

• 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.

Q14: Discuss how studying natural phenomena can lead to practical applications. (3 Mark)
Ans: 

• 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.

Q15: Why is it important for science to involve hands-on activities and experiments? (3 Mark)
Ans: 

• 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.

Q16: How does science contribute to creating a sustainable world, and why is this important? (4 Mark)
Ans: 

• 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.