Chapter One: Measurement

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Presentation transcript:

Chapter One: Measurement 1.1 Measurements 1.2 Time and Distance 1.3 Converting Measurements 1.4 Working with Measurements

1.2 Time and Distance Two ways to think about time: What time is it? How much time? A quantity of time is also called a time interval.

1.2 Time Time comes in mixed units. Seconds are very short. For calculations, you may need to convert hours and minutes into seconds. How many seconds is this time interval?

1.2 Distance Distance is the amount of space between two points. Distance is measured in units of length. The meter is a basic SI distance unit. In 1791, a meter was defined as one ten-millionth of the distance from the North Pole to the equator. What standard is used today?

1.2 Metric prefixes Prefixes are added to the names of basic SI units such as meter, liter and gram. Prefixes describe very small or large measurements.

1.3 Converting units To convert 1,565 pennies to the dollar amount, you divide 1,565 by 100 (since there are 100 pennies in a dollar). Converting SI units is just as easy as converting pennies to dollars.

Convert 655 mm to m Looking for: Given: Relationships: Solution: Solving Problems Convert 655 mm to m Looking for: …the distance in meters Given: …distance = 655 millimeters Relationships: Ex. There are 1000 millimeters in 1 meter Solution: 655 mm = .655 meters

Convert 142 km to m Looking for: Given: Relationships: Solution: Solving Problems Convert 142 km to m Looking for: …the distance in meters Given: …distance = 142 kilometers Relationships: Ex. There are ? meters in 1 kilometer? Solution: Use the conversion tool.

Convert 754,000 cm to km Looking for: Given: Relationships: Solution: Solving Problems Convert 754,000 cm to km Looking for: …the distance in kilometers Given: …distance = 754,000 centimeters Relationships: Ex. There are ? cm in 1 m? There are ? m in 1 km? Solution: Use the conversion tool.