CBSE Class 9 Chemistry Chapter 1 Matter in Our Surroundings Worksheet with Answers

Matter is anything that has mass and occupies space. It exists in three primary states: solid (fixed shape and volume), liquid (fixed volume but variable shape), and gas (variable shape and volume). The smallest units of matter are particles—atoms or molecules—that are in constant motion and have spaces between them. The kinetic energy of these particles determines the state of matter. When you heat a substance, particles move faster; when you cool it, they slow down. Change of state refers to the transformation of matter from one state to another—melting, freezing, evaporation, condensation, sublimation, and deposition—all driven by energy changes. These are physical changes; the substance itself remains the same. Evaporation is particularly important: it is the process where liquid turns to gas at any temperature (not just boiling point), and it causes cooling because high-energy particles escape. Factors like surface area, temperature, humidity, and wind speed affect evaporation rate. Latent heat of fusion and vaporization are the energies required to change state without changing temperature. Understanding matter helps you explain phenomena like why your wet hair dries, why ice cubes shrink in the freezer, and why perfume spreads across a room. This chapter lays the foundation for all physical chemistry in Classes 9 to 12.

This section tests your conceptual clarity and recall. Each question has four options; only one is correct. Read carefully, eliminate wrong choices, and select the best answer. These MCQs are modeled on CBSE Class 9 Chemistry Chapter 1 patterns seen in recent board and school exams. Focus on definitions, properties of states, factors affecting evaporation, and change of state. Each question is worth 1 mark. Attempt all six questions within 10 minutes to build exam speed and confidence in NCERT Class 9 Chemistry fundamentals.

Fill in the blanks with appropriate words or phrases from the chapter. This section reinforces terminology and definitions central to CBSE Class 9 Chemistry notes. Write concise, precise answers—often a single word or short phrase. Pay attention to spellings (e.g., 'sublimation' not 'sublimination'). Each blank is worth 1 mark. Suggested time: 5 minutes. These questions test your grasp of key terms from the NCERT textbook and your ability to recall facts under exam pressure. Review your Class 9 Chemistry solutions if you find any term unfamiliar before attempting this section.

Match the items in Column A with the correct descriptions in Column B. Write the correct pair (e.g., 1-D, 2-A) in your answer sheet. This format appears frequently in CBSE Class 9 Chemistry internal assessments and helps you link concepts with examples or definitions. Each correct match is worth 1 mark. Suggested time: 5 minutes. Carefully read both columns before matching; sometimes similar-sounding terms can confuse you. Cross out options in Column B once matched to avoid duplication. This section strengthens your understanding of NCERT Class 9 Chemistry Chapter 1 terminology and real-world applications of matter concepts.

Answer the following questions in 2 to 3 sentences or 30 to 40 words each. These are standard CBSE Class 9 Chemistry 2-mark and 3-mark questions. Write clear, direct answers using correct scientific terminology. Define terms when asked, give reasons when asked why, and provide examples where helpful. Each question is worth 2 or 3 marks as indicated. Suggested time: 20 minutes for all five. Use bullet points if it helps organize your answer, but ensure your language is complete and grammatically correct. These questions test your ability to explain concepts from Matter in Our Surroundings in your own words, a skill crucial for scoring well in board exams. Refer to Class 9 Chemistry solutions and notes for model answers if needed.

These questions demand deeper understanding, application, and reasoning. Write detailed answers of about 80 to 100 words or in well-organized points. Use diagrams if asked or if they help clarify your explanation. HOTS (Higher Order Thinking Skills) questions test your ability to analyze situations, compare concepts, and apply chapter knowledge to new scenarios. Each question is worth 5 marks. Suggested time: 25 minutes for all three. Structure your answer with an introduction, main body (definitions, explanations, examples), and a brief conclusion if appropriate. These are the types of questions that distinguish high scorers in CBSE exams. Practice writing complete answers for Class 9 Chemistry Chapter 1 long-answer questions regularly, and compare your responses with NCERT solutions.

Read the passage carefully and answer the questions that follow. Case-study questions are a recent addition to the CBSE exam pattern and test your ability to apply theoretical knowledge to real-world situations. This format appears in board exams and requires careful reading, comprehension, and recall of NCERT Class 9 Chemistry concepts. Each sub-question is worth 1 mark. Suggested time: 8 minutes. Underline keywords in the passage, identify which concepts from Matter in Our Surroundings are being tested, and answer precisely. Do not write more than necessary—brevity and accuracy score marks here. Such questions often link everyday observations (like making tea, drying clothes, or ice melting) to the science you studied in this chapter, helping you appreciate the practical relevance of CBSE Class 9 Chemistry.

Below is the complete answer key for all sections. For MCQs, the correct option is given with a brief reason. For fill-in-the-blanks and match-the-following, direct answers are provided. For short and long answers, model responses are given. Use this key to self-assess your performance. Award yourself marks honestly, and identify weak areas for revision. If you scored below 70 percent in any section, revisit that topic in your NCERT Class 9 Chemistry textbook or refer to Class 9 Chemistry notes and solutions. Regular practice with such worksheets is the best way to master Matter in Our Surroundings and build confidence for your CBSE exams. Remember, understanding the 'why' behind each answer is more important than memorizing it. If you need personalized doubt-solving and step-by-step explanations with photo upload, CBSETUTOR.ai offers 24x7 AI tutoring for Classes 6 to 12 at a flat fee of nine hundred ninety-nine rupees per month, with a three-day free trial.

Treat this worksheet as a timed mini-test. First, read the chapter from your NCERT Class 9 Chemistry textbook and make short notes. Then attempt this worksheet in one sitting under exam conditions: 90 minutes, no textbook, no phone. Use a pencil so you can erase and redo if practicing multiple times. After completing, check your answers against the answer key and mark yourself strictly—don't give half-marks generously. Calculate your percentage. If you score above 80 percent, you have a strong grasp of Matter in Our Surroundings. If you score between 60 and 80 percent, revisit weak areas and attempt similar questions from CBSE Class 9 Chemistry solutions guides. Below sixty percent means you need to reread the chapter and clarify doubts. Worksheets like this one are excellent for revision one week before your exams. They help you identify gaps, practice time management, and build confidence. Parents: encourage your child to attempt such worksheets regularly, and review incorrect answers together to reinforce learning. For students who need extra support or instant doubt resolution—especially when parents are busy or local tutors are unavailable—CBSETUTOR.ai provides a round-the-clock AI tutor. You can upload a photo of any question from this worksheet, and the AI explains the solution step-by-step in simple language. All subjects for Classes 6 to 12 are covered at a single, affordable price of nine hundred ninety-nine rupees per month, with a three-day free trial to try it risk-free.

First, memorize all definitions exactly as given in the NCERT textbook—examiners expect precise language. Second, understand the reason behind every phenomenon; for example, do not just memorize that evaporation causes cooling—know why (high-energy particles leave). Third, practice drawing neat, labeled diagrams for activities (e.g., showing diffusion or state change). Fourth, when asked to 'explain', always give reasons and examples; one-line answers fetch fewer marks. Fifth, revise numerical problems on density if your teacher has covered them. Sixth, during exams, read questions carefully—if asked for three points, give exactly three, not two or five. Seventh, use scientific terms correctly: say 'particles' not 'pieces', 'kinetic energy' not 'movement energy'. Eighth, manage time: do not spend ten minutes on a two-mark question. Ninth, in case-study questions, underline keywords in the passage that hint at the concept being tested. Tenth, review past CBSE board papers for Chapter 1—question patterns repeat. Finally, stay calm and confident; Matter in Our Surroundings is a scoring chapter if you have clarity of concepts and practice enough. If your school is in a metro city like Delhi, Mumbai, or Bangalore, you might have access to coaching centers, but if you live in a smaller town or your schedule is packed, online AI tutoring platforms like CBSETUTOR.ai level the playing field by giving you instant, unlimited access to a personal tutor anytime you need help—all for nine hundred ninety-nine rupees a month.