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What is an Hour?
Grade Level:
Class 2
Physics, Computing, AI, Biology, Finance
Definition
What is it?
An hour is a unit of time. It tells us how long something lasts. One hour is made up of 60 smaller units called minutes.
Simple Example
Quick Example
Imagine your favourite TV show like 'Chhota Bheem'. If it runs for 30 minutes, then two episodes back-to-back would take 1 hour. So, 1 hour equals two Chhota Bheem episodes!
Worked Example
Step-by-Step
QUESTION: Your school bus picks you up at 7:00 AM. It takes 1 hour to reach school. What time do you reach school?
STEP 1: We know the bus starts at 7:00 AM.
---STEP 2: We need to add 1 hour to the start time.
---STEP 3: Adding 1 hour to 7:00 AM means the hour number increases by one.
---STEP 4: So, 7 becomes 8.
---STEP 5: The minutes (00) remain the same.
---ANSWER: You reach school at 8:00 AM.
Why It Matters
Understanding hours helps us plan our day, from school lessons to playtime. In careers like a pilot, knowing exact hours is crucial for flight schedules. Doctors use hours to track patient recovery, and event managers use them to plan concerts and festivals perfectly.
Common Mistakes
MISTAKE: Thinking an hour has 100 minutes because it's a 'round number'. | CORRECTION: An hour always has exactly 60 minutes. It's a specific unit of time.
MISTAKE: Confusing AM and PM when calculating hours across noon or midnight. | CORRECTION: Remember AM is morning/day and PM is afternoon/night. 12 PM is noon, and 12 AM is midnight.
MISTAKE: Adding 60 minutes to the minutes part of a time without changing the hour. | CORRECTION: When minutes go past 59, they 'roll over' and add 1 to the hour. For example, 3:45 + 20 minutes is 4:05, not 3:65.
Practice Questions
Try It Yourself
QUESTION: Your tuition class starts at 5:00 PM and lasts for 1 hour. What time does it finish? | ANSWER: 6:00 PM
QUESTION: A train journey is 3 hours long. If it starts at 9:30 AM, what time will it reach its destination? | ANSWER: 12:30 PM
QUESTION: Your mom spends 45 minutes cooking lunch and then 30 minutes cleaning up. How many hours and minutes did she spend in total? | ANSWER: 1 hour and 15 minutes
MCQ
Quick Quiz
How many minutes are there in 1 hour?
100 minutes
30 minutes
60 minutes
120 minutes
The Correct Answer Is:
C
An hour is a standard unit of time, and it is defined as having 60 minutes. Options A, B, and D are incorrect values.
Real World Connection
In the Real World
When you book a slot for a cricket net practice or a doctor's appointment online, the system uses hours and minutes to show available times. Delivery apps like Swiggy or Zomato also estimate delivery times in minutes, which are parts of an hour, helping you know when your food will arrive.
Key Vocabulary
Key Terms
HOUR: A unit of time equal to 60 minutes | MINUTE: A unit of time, with 60 minutes making 1 hour | TIME: The ongoing sequence of events from past through present to future | DURATION: The length of time that something continues or lasts
What's Next
What to Learn Next
Great job learning about hours! Next, you can explore 'What is a Day?'. Understanding days will help you connect hours to a larger unit of time and plan your activities over a longer period.
