Motion and Measurment

Question 1

What modes of transport did people use before the invention of the wheel?

Answer 1

They moved on foot and used animals for transportation

Initially, people carried goods on their backs and used boats for water transport.

Question 2

What major invention changed modes of transport significantly?

Answer 2

The invention of the wheel

The design of the wheel evolved over thousands of years.

Question 3

What were early boats made from?

Answer 3

Simple logs of wood

Early boats had hollow cavities made in the logs.

Question 4

What transportation methods were developed after the steam engine?

Answer 4

• Railroads for steam engine-driven carriages
• Automobiles like motor cars, trucks, and buses
• Motorized boats and ships
• Aeroplanes

The 20th century saw advancements such as electric trains and spacecraft.

Question 5

How can we determine how far a place is?

Answer 5

By knowing the distance, we can decide on the mode of transport

This involves understanding how far we can walk or if we need to take a bus or train.

Question 6

What is a unit of measurement?

Answer 6

A known fixed quantity used for comparison

Measurement results consist of a number and a unit.

Question 7

What is the SI unit of length?

Answer 7

Metre

The International System of Units (SI) provides standard measurements.

Question 8

Fill in the blank: The length of the foot was commonly used as a _______.

Answer 8

unit of measurement

Different regions had slight variations in the length of the foot.

Question 9

True or False: Everyone’s body parts are the same size, making them suitable for standard measurements.

Answer 9

False

Variations in body part sizes can lead to confusion in measurements.

Question 10

What must you do if the zero mark on a scale is broken?

Answer 10

Use another full mark and subtract its reading from the other end

This ensures accurate measurement despite the broken zero mark.

Question 11

How should one position their eye for accurate measurement?

Answer 11

Directly in front of the point being measured

Misalignment can lead to incorrect readings.

Question 12

What is the purpose of using a thread when measuring a curved line?

Answer 12

To measure the length of the curved line accurately

The thread can follow the contour of the curve.

Question 13

List two methods used for measuring distances in daily life.

Answer 13

• Using a metre scale
• Using a measuring tape

Different measuring devices are suitable for different objects.

Question 14

What is a common problem when using non-standard units like handspan?

Answer 14

Measurements can vary between individuals

This inconsistency can lead to confusion in communication of measurements.

Question 15

What is a cubit?

Answer 15

The length from the elbow to the fingertips

It was used in ancient Egypt as a unit of length.

Question 16

Fill in the blank: The length of a yard was measured by the distance from the end of the outstretched arm to the _______.

Answer 16

chin

This method of measurement was common in various cultures.

Question 17

What are some activities students can perform to measure classroom dimensions?

Answer 17

• Measure length and breadth using foot
• Measure width of a table using handspan

These activities help students understand measurement concepts practically.

Question 18

What is the metric system?

Answer 18

A standard unit of measurement created for uniformity

It was developed in France in 1790.

Question 19

What is the difference between a metre, centimetre, and millimetre?

Answer 19

• 1 metre = 100 centimetres
• 1 centimetre = 10 millimetres

These units are used for different scales of measurement.

Question 20

What is the method used to measure the length of a curved line?

Answer 20

Use a thread to trace the curve and measure its length against a scale.

This method provides a practical way to measure irregular shapes.

Question 21

What is the significance of standard units in measurement?

Answer 21

Standard units allow for accurate and consistent communication of measurements.

Without standard units, measurements can lead to confusion.

Question 22

List some examples of objects that can be at rest.

Answer 22

• House
• Table
• Clock

Objects at rest do not change their position over time.

Question 23

List some examples of objects that can be in motion.

Answer 23

• A flying bird
• Second’s hand of the clock
• A moving train

These objects change their position over time.

Question 24

What is the definition of motion?

Answer 24

Motion is a change in the position of an object with time.

This concept is fundamental in understanding physical phenomena.

Question 25

What type of motion is characterized by movement along a straight line?

Answer 25

Rectilinear motion. ## Footnote Examples include vehicles on a straight road and sprinters in a race.

Question 26

What is circular motion?

Answer 26

Circular motion occurs when an object moves along a circular path. ## Footnote Examples include the motion of a stone tied to a string being whirled around.

Question 27

What is periodic motion?

Answer 27

Periodic motion is when an object repeats its motion after a fixed interval of time. ## Footnote Examples include a pendulum or a child on a swing.

Question 28

How does the motion of a clock differ from that of a moving object?

Answer 28

The clock itself does not move from one place to another, but its hands exhibit circular motion. ## Footnote The hands of the clock rotate around a fixed point.

Question 29

What are some examples of periodic motion?

Answer 29

* Motion of a pendulum * Motion of a child on a swing * Vibrations of guitar strings ## Footnote Periodic motion can be observed in various everyday activities.

Question 30

What is the SI unit of length?

Answer 30

Metre. ## Footnote The International System of Units (SI) is used globally for measurements.

Question 31

Fill in the blank: One metre is __________ cm.

Answer 31

100 cm ## Footnote This conversion is essential for understanding metric measurements.

Question 32

Fill in the blank: Motion of a child on a swing is __________.

Answer 32

Periodic motion. ## Footnote This motion repeats after a set time interval.

Question 33

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

Answer 33

They are not consistent and can vary greatly from person to person. ## Footnote This inconsistency leads to confusion in measurements.

Question 34

Arrange the following lengths in increasing magnitude: 1 metre, 1 centimetre, 1 kilometre, 1 millimetre.

Answer 34

1 millimetre, 1 centimetre, 1 metre, 1 kilometre. ## Footnote Understanding the hierarchy of metric units is crucial for measurement.

Question 35

What is an example of a combination of different types of motion?

Answer 35

A ball rolling on the ground undergoes both rotational and rectilinear motion. ## Footnote This illustrates the complexity of motion in real-world scenarios.

Question 36

What do we observe about motion in our environment?

Answer 36

Motion is everywhere, from animals to natural phenomena like rivers and the moon. ## Footnote Recognizing motion helps us understand the dynamics of the world around us.

Question 37

What is the activity to observe the motion of ants?

Answer 37

Spread sugar on paper and mark the position of ants at intervals. ## Footnote This visualizes the concept of motion through tracking changes in position.