Science answers class 6 ls- motion and measurement

Hello friends in this article you are going to read about science.

1. Name the units used to measure in ancient India.
Ans- Angul, Foot, mutti, cubit, etc.

2. Why can a pace or a foot can't be used as a standard unit of length?
Ans- The length of a foot or pace is different of each person so it can't be used as a standard unit of measurement.

3. Define the following-
1. Motion- The changing of place with time is called motion.
2. Rectilinear motion- Motion occurs along a straight line is called rectilinear motion.
3. Circular motion- The thing is said to be in circular when it is rotating on the same axis.
4. Periodic motion- If the motion is repeating it at the same intervals is called periodic motion.
5. Random motion- The motion which takes place in only one direction is called random motion.

4. Write the similarities and differences between bicycle and fan.
Ans- Similarities- Both are in circular motion.
Differences- Bicycle is in rectilinear motion too while fan is not in rectilinear motion.

5. Why can we use elastic measuring tape to measure distance?
Ans- The Elastic measuring tape will not give exact length.

6. What will you use to measure the grith of a tree?
Ans- Measuring tape.

7. What precaution is to be taken to measure with meter scale.
Ans- 1. Place scale is in contact to the object.
2. Your eye should be in front of the scale.
3. Start to measure from 0 or if it is broken start from 1 and subtract 1 from the answers.

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