Class 6 Science - Examination Question Bank (NCERT 2026-27)

Chapter 1

THE WONDERFUL WORLD OF SCIENCE

Scientific Method & Thinking

A FILL IN THE BLANKS

1. Science is a way of thinking, observing and doing things.

Ans: thinking

2. The most important thing needed to learn science is curiosity.

Ans: curiosity

3. The scientific method is a step-by-step process.

Ans: step-by-step

4. First, we observe something interesting or not understood.

Ans: observe

5. After observation, we think of a question.

Ans: question

6. We then guess a possible answer to the question.

Ans: answer

7. We test our guess through experiments or more observations.

Ans: observations

8. Scientists analyse the results obtained from experiments.

Ans: results

9. Anyone who follows the scientific method is working like a scientist.

Ans: scientist

10. Science helps us find answers to our questions.

Ans: questions

B MULTIPLE CHOICE QUESTIONS (MCQs)

1. What is the most important quality needed for learning science?

(a) Fear (b) Curiosity (c) Silence (d) Laziness

Answer: (b) Curiosity

2. What comes first in the scientific method?

(a) Analysis (b) Experiment (c) Observation (d) Conclusion

Answer: (c) Observation

3. After observing something, we generally:

(a) ignore it (b) ask a question (c) stop thinking (d) copy it

Answer: (b) ask a question

4. A possible answer to a question is called a:

(a) guess (b) measurement (c) fact (d) result

Answer: (a) guess

5. A guess is tested through:

(a) stories (b) experiments or observations (c) imagination only (d) memory

Answer: (b) experiments or observations

C SHORT & LONG ANSWER QUESTIONS

Q1. Write the steps of the scientific method in order. (3 Marks)

Ans:

Observe something interesting or not understood.
Ask a question.
Guess a possible answer (Hypothesis).
Test the guess through experiments or more observations.
Analyse the results.

Q2. Why is science not merely memorising facts? (2 Marks)

Ans: Science involves observation, questioning, testing ideas, and analysing results, not just memorising information.

Q3. Explain the scientific method with a daily-life example. (5 Marks)

Ans: The scientific method is a step-by-step process. First, we observe a problem. Then we ask a question, make a possible guess, test it through experiments or checks, and analyse results.
Example: If a pen stops writing, we first check if the ink is finished. If ink is present, we check if the tip is dried or clogged. This is scientific thinking in everyday life.

Chapter 2

DIVERSITY IN THE LIVING WORLD

Plants, Animals & Habitat

Q1. Differentiate between Taproot and Fibrous root. (3 Marks)

Feature	Taproot	Fibrous root
Structure	Has one main root with side roots	Bunch of thin, similar-sized roots
Venation Link	Reticulate venation (mostly Dicot)	Parallel venation (mostly Monocot)
Examples	Mustard, Hibiscus, Mango	Grass, Wheat, Maize

Q2. Differentiate between Monocot and Dicot plants. (3 Marks)

Monocot	Dicot
One cotyledon in seed	Two cotyledons in seed
Fibrous roots	Taproot system
Parallel leaf venation (e.g. Maize, Grass)	Reticulate leaf venation (e.g. Chickpea, Mustard)

Q3. Explain Habitat and Adaptation with examples. (5 Marks)

Ans:
• Habitat: The place where an organism lives and gets food, water, air, and shelter.
• Adaptation: Special features that help organisms survive in their specific environment.
• Example 1: Cactus has a thick fleshy green stem to store water and reduce water loss in deserts.
• Example 2: Deodar / Conifers in mountain regions have a conical shape and sloping branches so snow slides off easily.

Chapter 3

MINDFUL EATING: A PATH TO A HEALTHY BODY

Nutrition & Health

Q1. Explain Nutrient Types, Functions & Sources. (5 Marks)

Energy-Giving Foods: Carbohydrates and Fats (Rice, Wheat, Potato, Oils, Ghee).
Body-Building Foods: Proteins for growth and repair (Pulses, Milk, Eggs, Paneer).
Protective Nutrients: Vitamins and Minerals for disease defense (Fruits, Green Vegetables).
Roughage (Dietary Fibre): Helps in bowel movement and removal of undigested waste.
Water: Essential for nutrient absorption and excretion.

Q2. Write the Deficiency Diseases Table. (3 Marks)

Nutrient	Deficiency Disorder	Key Symptoms
Vitamin A	Night Blindness / Poor Vision	Loss of vision in darkness
Vitamin C	Scurvy	Bleeding gums, slow wound healing
Vitamin D	Rickets	Soft, bent and weak bones
Iodine	Goitre	Swollen neck gland
Iron	Anaemia	Weakness, low haemoglobin

Q3. What are Food Tests for Starch, Fat and Protein? (3 Marks)

• Starch Test: Add dilute Iodine solution → turns Blue-Black.
• Fat Test: Rub food on clean paper → an Oily Translucent Patch appears.
• Protein Test: Copper sulphate + Caustic soda solution → turns Violet.

Q4. What are Millets and Food Miles? (2 Marks)

• Millets: Nutri-cereals (Jowar, Bajra, Ragi) rich in fibre, minerals, and vitamins.
• Food Miles: The distance food travels from where it is grown to where it is consumed. We should prefer locally grown food to minimize food miles.

MOST IMPORTANT EXAM QUESTIONS (★ Revision List)

Chapter 1

★ What is Science & Curiosity?
★ Steps of scientific method.
★ Daily-life example of scientific thinking.

Chapter 2

★ Biodiversity & Habitat definition.
★ Taproot vs Fibrous root.
★ Monocot vs Dicot (venation & root link).
★ Cactus & Conifer adaptations.

Chapter 3

★ Major nutrient groups & Balanced diet.
★ Deficiency diseases (A, C, D, Iodine, Iron).
★ Starch, Fat & Protein chemical tests.
★ Millets (Nutri-cereals) & Food miles.

ONE-LINE QUICK REVISION SHEET

Science: Way of thinking & understanding.

Curiosity: Desire to know & explore.

Method: Step-by-step problem solving.

Taproot: Dicot + Reticulate venation.

Fibrous: Monocot + Parallel venation.

Habitat: Organism's living place.

Adaptation: Survival feature.

Scurvy: Vitamin C deficiency.

Rickets: Vitamin D deficiency.

Goitre: Iodine deficiency.

Millets: Nutri-cereals (Ragi, Bajra).

Food Miles: Transport distance.