## This video covers dynamics of motion, and speed, ways to measure them and uses numerical problems to illustrate their units and applications

### Introduction to CBSE Class 7 Science Chapter "Motion and Time"

“Motion and Time” in the CBSE Class 7 Science curriculum delves into the scientific understanding of how objects move and the relationship between time and motion. It starts with defining motion as a change in position of an object over time and describes various types of motions like uniform and non-uniform. The chapter explains that the speed of an object is the distance traveled per unit of time and is calculated using the formula speed = distance/time.

Students learn how to represent motion through distance-time graphs, where a straight line represents uniform motion and a curved line indicates non-uniform motion. The chapter also introduces the concept of average speed and how it differs from uniform speed. Simple and engaging activities are included to help students comprehend the concept of measuring time using various instruments, including standard clocks and sundials.

The narrative is enriched with practical examples and exercises, making the abstract concepts of motion and time relatable and understandable for young minds.

**Assignments for CBSE Class 7 Science Chapter “Motion and Time”**

**Speed Calculation Exercise**: Take a short trip and calculate the speed of your journey using the distance covered and the time taken.**Distance-Time Graph**: Plot a distance-time graph for a simple scenario, like walking to the park or cycling down the street.**Understanding Non-uniform Motion**: Observe different vehicles on the road and describe instances of non-uniform motion.**Create a Sundial**: Build a simple sundial and use it to tell time, then compare its accuracy with a modern clock.**Average Speed Diary**: Keep a diary for a day tracking various speed changes in routine activities and compute the average speed for a given task.

**Conclusion**

The chapter “Motion and Time” imparts essential knowledge to students about the workings of the physical world, particularly how objects move and how we measure this movement over time. By grasping these concepts, students build a foundation for understanding the more complex principles of physics that govern our daily lives.

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