Boost your Performance in CBSE Class 7 Science Chapter 9 Important Questions - Motion and Time FREE PDF Download
Very Short Answer Questions: 1 mark
1. Match the Following
Ans: 1-e, 2-d, 3-a, 4-b, 5-c
Short Answer Questions: 3 marks
1. Explain oscillatory motion.
Ans: Oscillatory motion is a form of periodic motion in which an object performs the same motion repeatedly. Oscillatory motion can go on indefinitely in the absence of friction. Oscillatory motion is also known as periodic motion. In this type of motion the object moves between two extreme ends and the centre of these extreme positions is called mean position. Example: Simple Pendulum.
2. Explain uniform motion.
Ans: When an object travels equal distance in equal time in a straight line it is called uniform motion. Velocity of the object remains the same throughout the journey. There is zero acceleration in this kind of motion. The distance-time graph makes a straight line.
E.g. Moving blades of a ceiling fan.
3. Explain non-uniform motion.
Ans: In non-uniform motion the graph between distance and time is not a straight line i.e the object is not travelling equal distance in equal interval of time. Velocity throughout the journey is not constant.
E.g. Motion of a car on a traffic jammed road.
4. If a car travels 216 kilometres in 4 hours, calculate its speed.
Ans: Given,
Total distance travelled = 216 km
Total time taken = 4 hours
As we know, speed is the distance travelled per unit time. So,
Speed = distance/time = 216/4
= 54 km/hr
5. If a pendulum completes 40 oscillations in 10 seconds, calculate its time period.
Ans: Given,
Total time taken = 10 s
Number of oscillations = 40
As it is known, Time period of a simple pendulum is defined as the time taken for a single oscillation.
Hence, Time period = total time taken/total number of oscillations
= 10/40
=0.25s
Long Answer Questions: 5 marks
1. Consider the following distance time graph and answer the questions that follow.
What was Sian’s speed for the first 30 minutes of her journey?
Ans: In the first 30 minutes Sian had travelled 20km.
Distance = 20km
Time = 30 min
Speed = distance/ time
= 20km/30min
= 20 km/0.5 hr
= 40km/hr
15 minutes after starting the journey how far had Sian reached
Ans: 15 minutes into her journey Sian had travelled 10 km.
What is plotted in the X- axis and what is plotted in the Y- axis?
Ans: On the X-axis, time is plotted in minutes and on Y axis distance is plotted in kilometres.
2. Anil cycled from his home to the park, waited for a while and then returned home.
At what time did Anil leave his home?
Ans: Anil left his home at 9:05 AM.
How many minutes did Anil wait in the park?
Ans: Anil waited 10 minutes in the park, from 9:35-9:45 AM
What is the distance from Anil’s home to the park?
Ans: The distance from Anil’s home to the park is 7 kilometres.
What was Anil’s speed in his journey to the park?
Ans: Speed = distance/time and given that time taken is 30 min (from the graph)
Speed (to the park) = 7km/30 min
= 7km/0.5 hr
= 14km/hr
What was Anil’s speed in the return journey?
Ans: As it is known,
Speed = distance/time
And, Time taken for the return journey = 20 min.
Hence, Speed for the return journey = 7km/20min
= 21 km/hr
CBSE Class 7 Science Motion and Time Chapter 9 Important Questions - PDF
Class 7 Chapter 9 important questions can be found online in a PDF format and one can find textbooks related to the same. CBSE prescribed textbooks have only one problem by default; their textual matter is long and exhaustive, forcing a lot of students to read through paragraphs and multiple diagrams just to understand one concept. Many students end up spending time studying concepts and formulae that prove to be redundant in their examinations. This is because a text-book or online source material does not prepare one in terms of understanding what kind of questions may appear related to the same chapter. This is mainly why Chapter 9 Science Class 7 important questions are a great way to revise and prepare for examinations.
CBSE Class 7 Science Motion and Time important questions - PDF, as it suggests, consists of questions as per CBSE curriculum standards. A more holistic approach to your exams would be to refer to this PDF, which can be found online here. The solutions for Class 7 Science ch 9 important questions will provide a basic, but a clearer idea about chapters. This in turn will aid a student in analysing how questions are framed, and how they should be answered. To add to the aforementioned, the PDF is easily accessible online and is, most importantly, completely free. So, why wait? Download one today from Vedantu. official website of Vedantu!
NCERT Solutions - Important Questions for Class 7 Science Chapter 9
The NCERT solutions are made to help you revise the CBSE syllabus by using the ch 9 Science Class 7 important questions. The questions range from short question answers to long answer type questions. Since this chapter is primarily about Physics (Motion and Time are concepts found in physics), it will also contain figure type questions, where you will have to draw diagrams and graphs. The important questions for Class 7 Science Motion and Time touch upon concepts ranging from uniform, or non-uniform motion, to time-related concepts such as the relationship between speed and distance and time, the time period of the oscillations of a pendulum, etc.
It is significant to mention that the PDF is divided into three parts, characterised as “A”, “B” and “C”. “A” contains very short answer questions and is also the smallest part in the paper. “B” has the highest number of questions within it, which is 5 questions in total. Part “C” consists of long-answer type questions, which means that while it might not have too many questions within it, the questions themselves require long answers - which take a lot of time to complete.
The Benefits of Ch. 13 Science Class 7 Important Questions
The benefits of using important questions for Class 7 Science Motion and Time reveal themselves when a student manages to cohesively use the important questions for Class 7 Science Chapter 9. Moreover, the Class 7 Science Chapter 9 important questions are primarily made to help a student thoroughly understand the subject matter. Find a list of additional benefits in the following:
The Class 7 Science Chapter 9 important questions are simple and structured to be easy for the layman student to understand the core concepts of the chapter.
The questions & solutions are aimed at improving the speed and accuracy of students.
The variety of exercises are included in the PDF to help students understand how to answer different types of questions.
The ch 9 Science Class 7 important questions are written by experts in the field of Science, which means that students will be getting the best exercises in terms of questions related to Motion and Time.
Conclusion
For CBSE Class 7 Science Chapter 9 on "Motion and Time," it's crucial to focus on key questions provided by Vedantu. These questions likely cover essential concepts related to motion and time, helping students grasp the fundamentals effectively. While specific sections may vary, it's essential to pay extra attention to those labeled as very important. These sections could include fundamental principles or practical applications of motion and time, ensuring a comprehensive understanding. By prioritizing these critical questions, students can enhance their knowledge and perform well in their exams. Remember, practice with these important questions is key to mastering the chapter.
FAQs on Important Questions for CBSE Class 7 Science Chapter 9 - Motion and Time
1. What concepts of Motion and Time are easy to understand?
The concept of Motion and Time is essentially being taught at the seventh grade in this PDF. Therefore, one can rest assured that students who are so young shall not encounter tough concepts that are simply put out of their comprehension. For example, for time students are learning the relationship between distance and time. Simple calculations will be taught to students such as Speed = Distance/Time. In other words, the concepts that are touched upon are basic and do not go into the integrities associated with Motion and Time.
2. What is the importance of using NCERT solutions?
The CBSE curriculum is very extensive and tends to include very text-heavy reference books. Thus, students easily tend to dwell on concepts found within the text which are essentially redundant for them. And, while gathering knowledge is completely fine, students still need revision-based questions (such as the one found in the NCERT solutions for ch.13, Class 7 Science.
3. What do you mean by fabrics?
Fabrics (or cloths) are formed from fibres, which are very thin, thread-like strands. Cotton, wool, silk, flax, jute, nylon, polyester, and polyacrylic are some examples of fibres. The fibres are spun into yarn (a long continuous thread) that may subsequently be woven into fabric on a loom (or cloth). There are two sorts of fibres: natural and synthetic. Cotton, silk, wool are the natural ones and rayon, nylon, acrylic, and other man-made fibres are examples of synthetic fibres. To know more and practice questions students can download the vedantu app.
4. What part of cotton yields fibre?
Cotton exhibits a soft, fluffy nature and is a staple fibre that is characterized by its form in a ball around the seeds in the genus Gossypium, which belongs to the Malvaceae family of mallows. This Cotton fibre is almost completely composed of cellulose. Cotton bolls are also useful agents of seed dispersion under natural settings. Cotton fibres are in huge demand in the market and have a fair share in the fabric industry as well due to their texture and quality.
5. Where can I find the Solutions of Fibre to Fabric Class 7?
The Important questions are easily available on the Vedantu site.
Click on this link-Important Questions for Class 7 Science Chapter 9.
The webpage with Vedantu’s Important questions for Class 7 Science Chapter 9 will open
To download this, click on the Download PDF button and you can view the solutions offline free of cost.
You can avail various modules related to this topic and to this chapter on the site as well.
6. Which fibre is called Golden Fibre?
Jute is also popularly referred to as the "golden fibre" for its durability. It gets its name from its gleaming brown colour. It is the most cost-effective natural fibre and is completely biodegradable. It's created from cellulose and lignin from plants. Jute is a long, soft, and lustrous bast fibre that may be spun into coarse, strong threads. Raw jute is the industrial name for jute fibre. It shares a vast portion of the fibre industry due to its versatile nature and uses in multiple domains.
7. What is artificial silk?
Artificial silk, often known as art silk, is a synthetic fabric that mimics silk but is less expensive to create. "Artificial silk" is frequently used interchangeably with rayon. It's also known as bamboo silk when it's produced with bamboo viscose. When it comes to the production of artificial silk, mills create it in large quantities at one time, requiring less labour and expertise than the production of genuine silk, which is generated by silkworms. As a result, artificial silk is less expensive than genuine silk.
