# NCERT - 7 - Science :: Motion and Time

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Go To: NCERT-Science-Grade 7

[Contributor- Anu Nived]

Objective: To teach the students about speed, how to measure speed

Subtopics to be covered:

- Measurement of time, periodic and oscillatory motion

- Units of speed and time

- Distance time graph

Learning Outcome:

- Students can define speed, identify if objects moves fast or slow

- They know about odometer

- They would be able to do simple word problems based on speed , time and distance

[Contributor- Kripa S]

https://drive.google.com/open?id=0BzNF2YyqQxJ-WVhyTE9rbWNXcGc (JEPC Board) (Hindi Medium)

[Contributor - Kripa S]

(Source - Bodhaguru)

https://www.youtube.com/watch?v=LJc2XUOrBVk ( Hindi - Universe - Rotation of Earth )

[Contributor - Arshea Bimal, Kripa S]

1. Any 5 students run from one point to another (fixed distance) one by one. Record the time taken. The Speed of each student is the distance run divided by time taken.

2. Any 5 students hop from one point to another (fixed distance) one by one. Record the time taken. The Speed of each student is the distance hopped divided by time taken.

3. Any 5 students walk from one point to another (fixed distance) one by one. Record the time taken. The Speed of each student is the distance walked divided by time taken.

4. Take a stone, tie a thread to it and whirl it with your hand. Observe the motion of the stone. We see that the stone moves along a circular path.

[Contributor - Rahul Rohit]

[Contributor - Fathima Nazar]

 Term Transliterated Term Translated Term Bar Graph बार ग्राफ़ रेखा ग्राफ Graph ग्राफ़ रेखांकन Non Uniform Motion नॉन युनीफॉर्म मोशन असमान गति Oscillation ऑसिलेशन दोलन Simple pendulum सिंपल पेंडुलम सरल लोलक Speed स्पीड गति, चाल Time period टाइम पीरियड आवर्तकाल Uniform motion यूनीफॉर्म मोशन एकसमान गति Unit of time यूनिट ऑफ़ टाइम समय का मात्रक

[Contributor - Rahul Rohit]

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