Understanding the Hour

An hour is a unit of time that is equal to 60 minutes, or 3,600 seconds. It is commonly used for measuring the duration of time and is a fundamental concept in the study of time and its measurement.

Key Points to Remember

An hour is divided into 60 minutes, and each minute is divided into 60 seconds.
The symbol for hour is "h". For example, 2 hours can be written as 2h.
There are 24 hours in a day, and they are typically denoted using the 12-hour or 24-hour clock system.
The 12-hour clock system uses "a.m." and "p.m." to distinguish between morning and afternoon/evening hours.

Conversion and Calculations

When working with hours, it's important to be able to convert between hours, minutes, and seconds. Here are some key conversion factors:

1 hour = 60 minutes
1 minute = 60 seconds

For example, to convert 2.5 hours to minutes, you would use the following calculation:

2.5 hours * 60 minutes/hour = 150 minutes

Practice Questions

Convert 3 hours to minutes.
How many seconds are there in 4.5 hours?
If it is 8:00 a.m. now, what time will it be in 6 hours?

Answers to Practice Questions

3 hours * 60 minutes/hour = 180 minutes
4.5 hours * 60 minutes/hour * 60 seconds/minute = 16,200 seconds
If it is 8:00 a.m. now, in 6 hours it will be 2:00 p.m.

Understanding the concept of hours and being able to perform conversions and calculations with them is an important skill in the study of time and measurement. By mastering the basics of hours, you will have a solid foundation for understanding more complex concepts related to time.

◂Science Worksheets and Study Guides Second Grade. What is science?

Vocabulary/Answer key

What is science?

The resources above cover the following skills:

LIFE SCIENCE

Ecosystems: Interactions, Energy, and Dynamics

Obtain information from literature and other media to illustrate that there are many different kinds of living things and that they exist in different places on land and in water (e.g., woodland, tundra, desert, rainforest, ocean, river).

EARTH AND SPACE SCIENCE

Earth’s Systems

Make observations from media to obtain information about Earth’s events that happen over a short period of time (e.g., tornados, volcanic explosions, earthquakes) or over a time period longer than one can observe (e.g., erosion of rocks, melting of glaciers).

Collect and evaluate data to identify water found on Earth and determine whether it is a solid or a liquid (e.g., glaciers as solid forms of water; oceans, lakes, rivers, streams as liquid forms of water).