CBSE Class 7 Science Chapter 01 The Ever Evolving World Of Science MCQs Set 03

Answer: (A) Science keeps growing and changing as new discoveries are made

Explanation:
The title itself signals that science is not a fixed body of facts but a living, growing field shaped by ongoing questioning and discovery, which matches the chapter's overall tone.

Answer: (A) How light and shadows behave

Explanation:
This picture appears right where the chapter turns to talk about light, shadows and how they can be used to tell time or perform shadow play.

Answer: (A) How mirrors can produce multiple reflected images

Explanation:
Placed near the chapter's discussion of light, this setup hints at an activity where angled mirrors multiply the reflections of an object, connecting to the broader theme of exploring light.

Answer: (A) An eclipse

Explanation:
Right after mentioning that the Earth and Moon can cast shadows, the chapter brings up eclipses as a fascinating result of this shadow-casting, and the crescent image fits that description.

Answer: (A) To nudge students toward framing a fun, imaginative question rather than an obvious one

Explanation:
Since the activity explicitly discourages boring questions like '32+10', a quirky number like 42 pushes students to think up something playful and unexpected.

Answer: (A) To show that even ordinary everyday statements can inspire an interesting question

Explanation:
It's a deliberately mundane phrase, chosen so students realise that curiosity-driven questioning can start from something as simple as a kitchen instruction.

Answer: (A) Even silly or humorous statements can be reshaped into a creative question

Explanation:
Nothing in the chapter suggests the activity is about animal care; the odd, funny answer is there purely to loosen up students' imagination before they invent a matching question.

Answer: (A) Scientific curiosity can be applied to anything, from tiny cells to distant stars

Explanation:
The line is followed by examples ranging from cells in a leaf to the movement of the Sun and stars, showing that science has no boundary of scale or distance.

Answer: (A) How people measured time before clocks and watches existed

Explanation:
The passage moves from questions about measuring time straight into how early humans used shadows for that purpose, which then opens the door to the broader topic of light.

Answer: (A) The Earth spinning on its axis so different regions face the Sun at different times

Explanation:
• Day and night depend on receiving light from the Sun
• The chapter links this directly to the Earth's rotation on its axis
• It separates this from eclipses, which instead involve shadows cast by the Earth and Moon

Answer: (A) To model a questioning mindset and spark curiosity in the reader

Explanation:
Rather than handing out facts, the author uses these open questions to draw readers into thinking and wondering the way a scientist would, setting the tone for the rest of the book.

Answer: (A) Life developed and changed gradually over a very long time

Explanation:
The word points to a slow, ongoing process of change rather than a sudden event, which fits the chapter's idea that living things have gradually figured out balanced ways to grow and survive.

Answer: (A) That the rate at which events occur is a worthwhile idea to explore scientifically

Explanation:
Placing runners beside a question about speed hints that motion and rate of change are themes students will investigate later in the book, tying physical activity to a scientific concept.

Answer: (A) To make scientific ideas feel relatable by connecting them to everyday experiences

Explanation:
Starting with things students already notice at home draws them into asking questions naturally, which matches the chapter's overall approach of building curiosity from ordinary life before moving into deeper concepts.

Answer: (A) It previews the year's topics while inviting students to explore science with curiosity and inquiry

Explanation:
As an introduction, the chapter walks through what lies ahead in the book while repeatedly encouraging a questioning mindset.
• It links topics like materials, changes, light, and Earth's movements together
• It frames science as a process rather than a fixed set of facts
• It ends with an activity that flips the usual question-answer routine

Answer: (A) Shadow puppets

Explanation:
The chapter notes that shadows were not only used for telling time but also had a playful, artistic use — casting shapes for shadow puppets.

Answer: (A) How water flows underground

Explanation:
Among the small, curious mysteries the book mentions is tracing how rainwater seeps and moves beneath the ground, far from where it fell.

Answer: (A) Rocks breaking into pebbles

Explanation:
• The chapter lists several familiar changes to spark curiosity.
• These include a battery running out, ice melting, and fruit ripening.
• Rocks breaking into pebbles is given as the geological example in this set.

Answer: (A) Getting ready for school in the morning and preparing to sleep at night

Explanation:
It grounds an abstract idea like time in something familiar — the daily rhythm of waking up for school and winding down for sleep — before asking readers to think about how time itself is tracked.

Answer: (A) How organisms have evolved efficient ways to feed, grow, and survive over time

Explanation:
This line follows discussion of eating, breathing, and nutrient circulation in living things, so the balance being praised is the way life has evolved workable survival strategies rather than anything about ecosystems or planets.

Answer: (A) Carrying nutrients from digested food to all parts of the body

Explanation:
The passage links growth and survival to blood circulating nutrients obtained from food throughout the body, alongside eating and breathing as essential life processes.

Answer: (A) A sense of where we as humans fit within the larger planet

Explanation:
Stepping outside the classroom is meant to build not just environmental knowledge but also a feeling for our own place on Earth, as the introduction puts it.

Answer: (A) Questioning, experimenting and exploring

Explanation:
• The book is framed as an invitation rather than a rulebook
• It specifically asks readers to question ideas
• It encourages performing experiments and exploring the world, not just absorbing information

Answer: (A) Each chapter builds on earlier knowledge while pushing readers toward new questions

Explanation:
Rather than being isolated units, the chapters are meant to build progressively, deepening understanding step by step while still inviting fresh curiosity at every stage.

Answer: (A) Learning is meant to feel like a willing, curiosity-driven choice rather than a forced task

Explanation:
Calling something an invitation implies an open, welcoming offer rather than a strict command, which fits the chapter's overall tone of encouraging curiosity over rote instruction.