Class 9 Science NCERT Solutions 2026-27
Chapter :1
Exploration: Entering the World of Secondary Science
Welcome to the NCERT Class 9 Science Solutions 2026–27, designed to help students understand the new Class 9 Science textbook, Exploration, in a simple and exam-oriented way. Science at the secondary stage is not just about memorising facts—it is about observing carefully, asking meaningful questions, understanding patterns, using measurements and equations, and exploring how scientific ideas explain the world around us.
The Class 9 Science Exploration textbook encourages students to think like young scientists. It introduces important scientific ideas through observation, experiments, models, reasoning and evidence. From the living world to the non-living world, students will learn how complex natural systems can be understood by using suitable scientific models and making appropriate assumptions.
Our NCERT Class 9 Science Solutions provide chapter-wise explanations, questions and answers, important concepts, examples and easy-to-understand solutions. These resources are useful for CBSE Class 9 students, school examinations, revision, homework and concept preparation.
Example 1.1:
Question:
Think of a cricket ball being hit for a six. You want to make a simple model. What details would you include? What would you ignore?
Answer:
To make a simple model, we first need to identify the main question:
“Will the ball cross the boundary without hitting the ground first?”
For answering this question, some details are important, while others can be ignored.
Important details to include:
- Mass of the cricket ball
- Speed at which the ball is hit
- Direction in which the ball is hit
Details that can be ignored in a simple model:
- Brand of the bat
- Colour of the ball
- Amount of grass on the field
- Stitching of the ball
Question:
Varsha told her friend Meghna, “It will rain this afternoon because the clouds look dark.” Think of some questions Meghna could ask Varsha to make this prediction scientifically testable.
Answer:
To make Varsha’s prediction scientifically testable, Meghna should ask questions based on measurable data and previous observations rather than relying only on the appearance of dark clouds.
Question:
Why Do Weather Forecasts Sometimes Go Wrong?
Answer:
Weather forecasts can sometimes go wrong because weather depends on many changing and interconnected factors, such as:
- Temperature
- Atmospheric pressure
- Humidity
- Wind speed and direction
Scientists use measurements, observations and mathematical models to predict weather. However, even very small differences in the initial weather conditions can become larger over time and produce significantly different results.
Question:
Checking ‘Viral’ Claims on Social Media: Is Eating Food Harmful During an Eclipse?
Answer :
Social media often spreads claims that may sound scientific but are not supported by evidence. One commonly circulated claim is:
“Food should not be eaten during an eclipse because it becomes harmful.”
To check such a claim scientifically, we should ask simple questions and look for observable evidence.
An eclipse occurs when one celestial body comes between another body and the source of light, producing a shadow.
Possible Question Answer
Class 9 Science NCERT Solutions 2026-27
1. According to the passage, science began with:
A. Mathematical equations
B. Wonder and curiosity
C. Complex models
D. Laboratory equipment
Answer: B. Wonder and curiosity
2. The main emphasis of science at the secondary stage is:
A. Memorising facts
B. Deep exploration
C. Avoiding experiments
D. Learning only equations
Answer: B. Deep exploration
3. Science is described as being concerned not only with what we know, but also with:
A. Who discovered it
B. How we know it
C. How old the knowledge is
D. How difficult it is
Answer: B. How we know it
4. Which of the following is mentioned as a way observations lead to scientific understanding?
A. Measurements
B. Guesswork
C. Opinions
D. Imagination alone
Answer: A. Measurements
5. Scientific ideas may sometimes be:
A. Memorised permanently
B. Tested, revised or discarded
C. Accepted without testing
D. Avoided when they are difficult
Answer: B. Tested, revised or discarded
6. The magnifying glass symbol in the textbook represents:
A. Mathematical calculation
B. Careful observation
C. Scientific equipment
D. Direction
Answer: B. Careful observation
7. The compass symbol represents:
A. Speed of exploration
B. Direction in scientific exploration
C. Measurement of distance
D. Observation of small objects
Answer: B. Direction in scientific exploration
8. According to the passage, scientific exploration requires:
A. Asking the right questions
B. Avoiding assumptions
C. Ignoring all models
D. Accepting every idea
Answer: A. Asking the right questions
9. What does the compass remind scientists to consider?
A. Only mathematical equations
B. The limits of where ideas apply
C. Only experimental results
D. The history of science
Answer: B. The limits of where ideas apply
10. Scientific exploration is described as:
A. Wandering without a purpose
B. Trying to understand the world with care and purpose
C. Memorising scientific definitions
D. Avoiding complex questions
Answer: B. Trying to understand the world with care and purpose
1. In the cricket-shot example, the main question for the model is:
A. What is the colour of the ball?
B. What brand of bat is used?
C. Will the ball cross the boundary without hitting the ground?
D. How much grass is on the field?
Answer: C. Will the ball cross the boundary without hitting the ground?
2. Which factor is most important when modelling whether a cricket ball will cross the boundary?
A. Colour of the ball
B. Brand of the bat
C. Mass of the ball
D. Amount of grass
Answer: C. Mass of the ball
3. Which combination contains details that can make little or no difference to the simple cricket-ball model?
A. Mass and speed
B. Speed and direction
C. Bat brand and ball colour
D. Mass and direction
Answer: C. Bat brand and ball colour
4. Which two factors are specifically identified as very important in the cricket-shot model?
A. Colour and stitching
B. Mass and speed/direction
C. Bat brand and grass
D. Spin and stitching
Answer: B. Mass and speed/direction
5. In a simple cricket-shot model, which factor may be ignored because it has a smaller effect?
A. Mass
B. Direction
C. Speed
D. Air resistance
Answer: D. Air resistance
6. Why can some details be ignored in a simple scientific model?
A. They are always useless.
B. They are impossible to measure.
C. They have smaller effects on the question being studied.
D. Scientists do not know about them.
Answer: C. They have smaller effects on the question being studied.
7. As a scientific model becomes more complex, scientists generally:
A. Remove all details
B. Add extra details for greater accuracy
C. Stop making observations
D. Avoid mathematical relationships
Answer: B. Add extra details for greater accuracy
8. If you are modelling the time taken to cycle from school to home, which information would most directly help?
A. Colour of your bicycle
B. Distance and travel speed
C. Brand of your school bag
D. Colour of the road
Answer: B. Distance and travel speed
9. Scientific language needs to be precise because scientific ideas must be communicated:
A. Quickly and informally
B. Clearly and unambiguously
C. Through stories only
D. Without symbols
Answer: B. Clearly and unambiguously
10. Words such as force, work, cell and reaction:
A. Always have exactly their everyday meanings
B. Have specific meanings in science
C. Are used only in mathematics
D. Have no fixed meaning
Answer: B. Have specific meanings in science
11. Science uses a shared language of:
A. Stories, drawings and colours
B. Terms, symbols and units
C. Languages and dialects
D. Experiments only
Answer: B. Terms, symbols and units
12. Which symbol represents velocity according to the passage?
A. m
B. F
C. v
D. I
Answer: C. v
13. Which symbol represents electric current?
A. I
B. F
C. m
D. v
Answer: A. I
14. Which quantity is represented by the symbol F?
A. Force
B. Frequency
C. Flow
D. Friction
Answer: A. Force
15. The symbol m is used to represent:
A. Motion
B. Mass
C. Metre only
D. Momentum
Answer: B. Mass