Gujarat BoardĀ GSEB Textbook Solutions Class 6 Science Chapter 10 Motion and Measurement of Distances Textbook Questions and Answers, Notes Pdf.

## Gujarat Board Textbook Solutions Class 6 Science Chapter 10 Motion and Measurement of Distances

### Gujarat Board Class 6 Science Motion and Measurement of Distances Textbook Questions and Answers

Question 1.

Give two examples each of the modes of transport used on land, water and air.

- Land – Bus, truck, train
- Water – Ship, boat
- Air – Aeroplane, Helicopter

Question 2.

Fill in the blanks:

- One metre is ……….. cm.
- Five kilometres is ………… m.
- The motion of a child on a swing is ……….
- The motion of the needle of a sewing machine is ………….
- The motion of the wheel of a bicycle is ……….

Answer:

- 100
- 5000
- periodic (oscillatory) motion
- periodic oscillatory
- circular

Question 3.

Why can a pace or a footstep not be used as a standard unit of length?

Answer:

Because a pace or a footstep of each and every person is not equal.

Question 4.

Arrange the following lengths in their increasing magnitude:

1 metre, 1 centimetre, 1 kilometre, 1 millimetre.

Answer:

Ascending order of length:

1 millimetre < 1 centimetre < 1 metre < 1 kilometre

Question 5.

The height of a person is 1.65 m. Express it in cm and mm.

Answer:

(a) 1.65 m, as one metre = 100 cm = 1.65 x 100 cm =165 cm

(b) 1.65 x 100 x 10 mm = 1650 mm.

Question 6.

The distance between Radhaās home and her school is 3250 m. Express this distance in km.

Answer:

As one km = 1000 m

So, 3250 m = \(\frac {3250}{1000}\)km = 3.250 km

Thus, the distance between Radhaās home and her school is 3.250 km.

Question 7.

While measuring the length of a knitting needle, the reading of the scale at one end is 3.0 cm and at the other end is 33.1 cm. What is the length of the needle?

Answer:

Length of the needle = 33.1 cm – 3.0 cm = 30.1 cm.

Question 8.

Write the similarities and differences between the motion of a bicycle and a ceiling fan that has been switched on.

Answer:

1. Similarity: Both the wheel of a bicycle and a ceiling fan exhibit motion on a fixed axis.

2. Dissimilarity: Bicycle moves forward thus executes rectilinear motion but fan rotates on its axis so it shows rotating motion.

Question 9.

Why could you not like to use a measuring tape made of an elastic material like rubber to measure distance? What would be some of the problems you would meet in telling someone about a distance you measured with such a tape?

Answer:

An elastic measuring tape gives an incorrect length of the distance between two points.

Reasons:

- The length of the elastic tape varies and depends upon the force by which it is stretched.
- Measurement would vary between 2 or 3 readings even when measured by the same person and by the same elastic tape.
- Measurement would also vary if different persons measure the same distance.

Question 10.

Give two examples of periodic motion.

Answer:

- Oscillations of a pendulum
- The motion of swing/motion of Earth around the sun