NCERT Class 9 Science MCQ Chapter 1 Exploration: Entering the World of Secondary Science

NCERT Class 9 Science MCQ Chapter 1 Exploration: Entering the World of Secondary Science English Medium As Per New Syllabus. NCERT Class 9 Science MCQ Chapter 1 Exploration: Entering the World of Secondary Science Notes to each chapter is provided in the list so that you can easily browse throughout different chapter NCERT Class 9 Science MCQ Chapter 1 Exploration: Entering the World of Secondary Science Question Answer Download PDF and select needs one. CBSE Class 9 Science Multiple Choice Solutions.

NCERT Class 9 Science MCQ Chapter 1 Exploration: Entering the World of Secondary Science

Also, you can read the CBSE book online in these sections Solutions by Expert Teachers as per (CBSE) Book guidelines. NCERT Class 9 Science Objective Type Solutions. These solutions are part of NCERT All Subject Solutions. Here we have given NCERT Class 9 Science MCQs English Medium Solutions for All Subject, You can practice these here.

Exploration: Entering the World of Secondary Science

Chapter – 1

MCQ

Tick the Correct Options: 

1. What does the magnifying glass symbolise in the textbook’s page numbers?

(a) Wandering aimlessly.

(b) Careful observation.

(c) Finding directions.

(d) Measuring speed.

Ans: (b) Careful observation.

2. What does the compass on the page numbers remind us of?

(a) Exploration needs direction and purpose.

(b) We must always travel north.

(c) Magnetism is the most important science.

(d) How to measure wind speed.

Ans: (a) Exploration needs direction and purpose.

3. Why does science use models?

(a) To make things look more attractive.

(b) To copy nature in perfect, full detail.

(c) To simplify real systems and focus on what is important.

(d) To replace the need for mathematics.

Ans: (c) To simplify real systems and focus on what is important.

4. In physics, how might a moving car be represented in a simple model?

(a) As a series of chemical reactions.

(b) As a complex engine diagram.

(c) As a layered sphere.

(d) As a single point.

Ans: (d) As a single point.

5. When studying the motion of a falling object, what detail is deliberately neglected to understand the basic effect of gravity?

(a) The mass of the object.

(b) Air resistance.

(c) The height of the fall.

(d) The shape of the Earth.

Ans: (b) Air resistance.

6. When making a simple model to see if a hit cricket ball will cross the boundary, which detail is important to include?

(a) The colour of the ball.

(b) The brand of the bat.

(c) The amount of grass on the field.

(d) The speed and direction in which it was hit.

Ans: (d) The speed and direction in which it was hit.

7. Which of the following details can be ignored when making a simple model of a cricket shot?

(a) The mass of the ball.

(b) The speed of the hit.

(c) The stitching of the threads at the seam.

(d) The direction of the hit.

Ans: (c) The stitching of the threads at the seam.

8. Why does science use a shared language of specific terms, symbols, and units?

(a) To make science harder for non-scientists to understand.

(b) To allow scientists across the world to describe observations and compare results clearly.

(c) To replace mathematical equations.

(d) To hide the true meaning of discoveries.

Ans: (b) To allow scientists across the world to describe observations and compare results clearly.

9. Which physicist simplified the study of stars by treating their matter as a hot gas?

(a) Albert Einstein.

(b) Isaac Newton.

(c) Meghnad Saha.

(d) C.V. Raman.

Ans: (c) Meghnad Saha.

10. What did Meghnad Saha focus on when studying the light from stars?

(a) Modelling every single atom and reaction.

(b) Temperature, pressure, and how atoms formed ions.

(c) The exact distance of stars from Earth.

(d) The magnetic fields of the planets around the stars.

Ans: (b) Temperature, pressure, and how atoms formed ions.

11. In science, what is a mathematical equation considered to be?

(a) A hurdle to overcome.

(b) Just a calculation tool for numbers.

(c) A compact statement about how certain things are related.

(d) A final, unquestionable law of nature.

Ans: (c) A compact statement about how certain things are related.

12. Why did a passenger aircraft once run out of fuel mid-flight?

(a) The fuel tank was leaking.

(b) The pilot flew in the wrong direction.

(c) A mix-up between pounds (lb) and kilograms (kg) units.

(d) The plane was carrying too much luggage.

Ans: (c) A mix-up between pounds (lb) and kilograms (kg) units.

13. What is the primary benefit of using standard (SI) units globally?

(a) They sound more scientific.

(b) They allow scientific results to be compared and ensure fairness in daily life.

(c) They are easier to calculate without math.

(d) They change based on local customs.

Ans: (b) They allow scientific results to be compared and ensure fairness in daily life.

14. What does a scientific “law” usually describe?

(a) A guess about future events.

(b) A regular pattern observed in nature.

(c) The exact reason why a pattern occurs.

(d) A broad idea to make sense of a situation.

Ans: (b) A regular pattern observed in nature.

15. Which scientific concept explains the jerk felt when a bus stops suddenly?

(a) Newton’s laws of motion.

(b) Principle of conservation of energy.

(c) The atomic theory.

(d) Saha’s theory of hot gases.

Ans: (a) Newton’s laws of motion.