Table of Contents
Bar Graph
- Definition- A bar graph is a chart that uses bars to represent data.
- Explanation- In a bar graph, each bar stands for a different thing or category. The height of each bar shows how much or how many of that thing there are. Bar graphs are great for comparing things like amounts or numbers.
- Example- If we make a bar graph of the number of books read by students in a class, each bar would represent a student, and the height of the bar would show how many books they read.
Also Check – Chapter 9 – Motion and Time – 4 Worksheets Solved and Unsolved
Graphs
- Definition- Graphs are drawings that show data or mathematical relationships.
- Explanation- Graphs can have lines, points, bars, or other shapes to show how different pieces of information are connected. They help us see patterns, compare things, and understand data better.
- Example- A line graph showing the temperature for each day of the week helps us see which days were hotter or colder.
Non-uniform Motion
- Definition- Non-uniform motion is when something moves at changing speeds.
- Explanation- In non-uniform motion, the speed of an object is not constant; it can speed up, slow down, or change speed in different ways as it moves.
- Example- A car that speeds up and slows down while driving through a city is showing non-uniform motion.
Oscillation
- Definition- Oscillation is when something moves back and forth in a regular pattern.
- Explanation- In oscillation, an object moves from one point to another and back again in a repetitive cycle.
- Example- A playground swing moving back and forth is an example of oscillation.
Simple Pendulum
- Definition- A simple pendulum is a weight hanging from a fixed point that can swing freely.
- Explanation- When the weight of the pendulum is moved to one side and released, it swings back and forth. This is a type of oscillation influenced by gravity.
- Example- A clock with a swinging pendulum uses a simple pendulum to keep time.
Speed
- Definition- Speed is how fast something is moving.
- Explanation- Speed tells us the distance an object travels in a certain amount of time. It doesn’t include the direction of movement.
- Example- If a car travels 100 kilometres in 2 hours, its speed is 50 kilometres per hour.
Time Period
- Definition- The time period is the time it takes to complete one cycle of motion.
- Explanation- In repeating motions, like oscillation, the time period is the duration it takes to go through one full cycle of that motion.
- Example- For a pendulum, the time period is the time it takes to swing all the way to one side and back again.
Uniform Motion
- Definition- Uniform motion is when something moves at a constant speed in a straight line.
- Explanation- In uniform motion, an object covers equal distances in equal time intervals without changing its speed.
- Example- A train moving at a steady speed of 60 kilometres per hour on a straight track is in uniform motion.
Unit of Time
- Definition- A unit of time is a specific amount of time used to measure how long things take.
- Explanation- Different units of time, like seconds, minutes, and hours, help us measure and talk about how long events last.
- Example- When we say a movie is 120 minutes long, we are using minutes as a unit of time to describe the duration of the movie.
Rapid Revision – Class 7 Science- Chapter 13 – Motion and Time
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Chapter 13 – Motion and Time–Class 7 science- Question and Answer (Fill in the Blanks)
Class 7 science -Chapter 13 – Motion and Time- Complete Notes
Chapter 13- Motion and Time–Class 7 science- Question and Answer (Solved MCQs)
Class 7 – Science- Chapter 13- Motion and Time- Question Answer (Long Question Answer)
Class 7 -Science- Chapter 13- Motion and Time Question Answer (Short Question Answer)
NCERT Solutions for Class 7 Science Chapter 13-Motion and Time
NCERT Exemplar Solutions- Class 7 Science- Chapter 13 – Motion and Time
