About Time and Direction
- Time is the irreversible sequence of events that occur in the past, present, and future.
- Directions are used to specify the position of something with respect to another. There are four main cardinal directions used.
- It is necessary to know about the time and directions for doing daily tasks precisely.
- Time and directions play an important role in daily life. This concept is about time and direction.
What Is the Time?
Question 1:
Who and Why Has It Decided To Make a Minute of 60 Seconds Instead of 10 or 100 Seconds?
Answer:
- Many centuries ago, an ancient civilisation called Babylonian decided to make a minute with 60 seconds
- The number ‘60’ can be derived by multiplying many different numbers such as (1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, and 60).
- It becomes easy to tell the exact time using the 60-second minute.
- Therefore, it was decided to make a minute of 60 seconds.
Question 2:
Why Are the Total Days in Each Month Not the Same?
Answer:
- Our calendar system is based on the total number of days the moon takes to complete its lunar phases.
- This takes 29.5 days to complete from the new moon to the full moon and back to the new moon.
- This is not an even number; hence the whole year cannot be divided evenly.
- So, to make it easy to count the months, some months are with a day extra or less.
Question 3:
What Is a Leap Year?
Answer:
- A year is a time required to complete one revolution by Earth around the Sun.
- Earth takes 365 and 1/4th days to complete a revolution around the Sun.
- This extra 1/4th day after every four years is counted as one complete day. Hence, every 4 years, we have 1 extra day in the year that is added to February.
- Hence, in every leap year, we have 29 days in February and 366 days in the year instead of 365,
How To Know Directions?
Question 1:
Why Does the Needle of the Magnetic Compass Always Point to the North?
Answer:
- A magnetic compass works on the magnetism of Earth.
- Earth is like a giant magnet that has two different poles.
- These poles are situated exactly opposite each other.
- A needle in a compass acts like a tiny magnet and always aligns itself to the north pole of Earth.
Question 2:
How Are All the Places Far Away From Each Other Fitted on a Single Small Map?
Answer:
- The accurate distances between the places are scaled down proportionately and accordingly represented on the map.
- For example, 1000 km can be expressed in 1 cm on a map.
- Also, to represent various places, symbols are used.
- This makes it easy to represent a large area on a small piece of paper.
Question 3:
What Are the Equator and Prime Meridian?
Answer:
- The prime meridian and Equator are imaginary lines that divide the Earth into equal halves.
- The Equator divides it into two equal northern and southern hemispheres.
- The prime meridian divides Earth into eastern and western hemispheres.
Question 4:
Why Are Symbols So Important on Any Map?
Answer:
- Symbols on a map are chosen to represent commonplaces like bus stops, railway stations, footbridges, restaurants etc.
- These symbols make the map easy to read and understand.
- Also, a lot of information can be presented in a limited space using symbols.
