Stepwise Answers & Diagrams for NCERT Class 7 Science Chapter 11
FAQs on Class 7 Science Chapter 11 Solutions: Light, Shadows and Reflections
1. What is a shadow?
A shadow is formed when an opaque object blocks the path of light, creating a dark area on the opposite side.
Key points:
- Shadows form only when light is blocked by opaque objects.
- The shape of the shadow resembles the shape of the obstructing object.
- Light travels in straight lines — this is why sharp shadows are formed.
- This concept is central in Class 7 Science Chapter 11: Light: Shadows and Reflections.
2. How do you draw ray diagrams in chapter 11?
To draw ray diagrams in Chapter 11, use straight lines and follow proper scientific conventions.
Steps:
- Draw the source of light (like a candle or torch).
- Draw the opaque object in the path of light.
- Use straight lines (rays) to show the direction of light from source to object, and from object to screen.
- Indicate the shadow area on the screen behind the object.
- Label all important parts: source, object, screen, shadow, and direction of rays.
3. Are NCERT solutions enough for class 7 science?
NCERT Solutions for Class 7 Science are usually enough for most school and CBSE exams.
Additional points:
- They cover all textbook exercises and key definitions.
- Well-structured, stepwise answers match the CBSE marking scheme.
- For deeper understanding or higher-order questions, practice from NCERT Exemplar and revision notes is helpful.
4. Which questions are likely from this chapter in school exams?
Common exam questions from Class 7 Science Chapter 11 include:
- Define shadow; explain how it is formed.
- Draw and label a ray diagram to show shadow formation.
- Differentiate between transparent, translucent, and opaque objects (with examples).
- Why does a shadow change size?
- Explain reflection and draw related diagrams.
- Diagram-based or definition-based short answers.
5. Do diagrams or definitions need to be included in answers for Class 7 Science Chapter 11?
Yes, including diagrams and definitions in your answers helps you score full marks.
- Draw neat, labelled diagrams for shadow and reflection questions.
- Write precise definitions for terms like shadow, reflection, opaque, etc.
- Use correct scientific terms as per the CBSE syllabus.
- Follow stepwise presentation as shown in NCERT Solutions for Class 7 Science Chapter 11.
6. How to present long answers to match CBSE marking?
To score full marks, present long answers by following key steps:
- Start with a definition or concept explanation.
- Include stepwise points and bullet lists.
- Add neat diagrams with proper labels when required.
- Highlight keywords and underline main terms.
- Conclude with a brief summary if needed.
7. Where can I download the chapter’s solutions PDF?
You can download the Class 7 Science Chapter 11: Light: Shadows and Reflections NCERT Solutions PDF from trusted educational websites.
Benefits of PDF download:
- Free and accessible offline anytime.
- Helps with fast revision before exams.
- Includes stepwise solutions and diagrams for better understanding.
8. What are the most important topics from Class 7 Science Chapter 11: Light: Shadows and Reflections?
The most important topics include:
- Shadow formation: definition, diagram, and reasoning
- Differences between transparent, opaque, and translucent objects
- Reflection of light and use of mirrors
- Drawing and labelling ray diagrams
- Daily life applications of shadows and reflections
9. How to learn diagrams or maps for Class 7 Science Chapter 11 effectively?
To learn diagrams for Chapter 11 effectively:
- Practice drawing shadow and mirror diagrams using a pencil and ruler for neatness.
- Always label parts: object, source, screen, shadow, and light rays.
- Revise common diagrams shown in NCERT Solutions.
- Use revision notes or flashcards for quick recall.
10. What is the CBSE marking scheme for Class 7 Science Chapter 11?
The CBSE marking scheme for Chapter 11 awards marks for:
- Stepwise answers (1 mark per correct step)
- Correct usage of keywords like shadow, opaque, reflection
- Neat, labelled diagrams where required
- Accurate definitions and clearly structured points
Partial marks are given for partially correct answers as per step marking.
