MeasurementA Common Language Length A Standard Measurement System
- Slides: 31
Measurement-A Common Language Length
A Standard Measurement System The Metric System
How Big is Big?
When and why was the metric system invented? • The metric system was invented in 1790 • The metric system was invented because countries were using many different systems of measurement causing confusion and lack of consistency
Who invented the metric system? • The metric system was invented by a group of French scientists
Metric System • A system of measurement used by the majority of countries on Earth based on the number 10
Metric prefixes • Kilo = one thousand Ex: Kilometer • Centi = one – hundredth = 1/100 Ex: centimeter • Milli = one - thousandth = 1/1000 Ex: millimeter • Micro = one – millionth 1/1, 000 Ex: micrometer • Nano = one – billionth 1/ 1, 000, 000 Ex: nanometer
A Standard Measurement System The International System of Units (SI)
Scientists all over the world use the International System of Units to measure: • • • Length Volume Mass Density Temperature Time
Calculating - How much larger is a kilo- than a deka-? • 100 times
Reading Checkpoint SI units are based on multiples of what number? • SI units are based on multiples of 10 • Add a zero = you are multiplying! • Subtract a zero = you are dividing!
Key Concept: Why do scientists use a standard measurement system? • Using SI as the standard system of measurement allows scientists to compare data and communicate with each other about their results • Using SI measurement also allows experiments to be repeated
Length
What is length? Length is the distance from one point to another
Length Units of Length
The basic unit of length in the SI system is the ……? • The basic unit of length in the SI system is the meter • How many centimeter in a meter? 100 cm • How many millimeters in a meter? 1000 mm
The two units that measure the length of smaller objects are, … • Millimeter or mm • Centimeter or cm One centimeter = ? 10 mm
Complete the Table Below Prefix Meaning Unit of Length milli one-hundredth meter one-thousand
Complete the Table Below Prefix Meaning milli One-thousandth Unit of Length one-hundredth meter one-thousand
Complete the Table Below Prefix Meaning Unit of Length milli One-thousandth millimeter one-hundredth meter one-thousand
Complete the Table Below Prefix Meaning Unit of Length milli One-thousandth millimeter centi one-hundredth meter one-thousand
Complete the Table Below Prefix Meaning Unit of Length milli One-thousandth millimeter centi one-hundredth centimeter one-thousand
Complete the Table Below Prefix Meaning Unit of Length milli One-thousandth millimeter centi one-hundredth centimeter none meter one-thousand
Complete the Table Below Prefix Meaning Unit of Length milli One-thousandth millimeter centi one-hundredth centimeter none meter one-thousand
Complete the Table Below Prefix Meaning Unit of Length milli One-thousandth millimeter centi one-hundredth centimeter none meter kilo one-thousand
Complete the Table Below Prefix Meaning Unit of Length milli One-thousandth millimeter centi one-hundredth centimeter none meter kilo one-thousand kilometer
Length Measuring Length
A meter is divided into centimeter and millimeters The longer lines on the metric ruler are called……. ? • centimeters
The shorter lines on the metric ruler are called… • millimeters
üReading Checkpoint One centimeter is divided into how many millimeters? • 10 millimeters (mm)
Calculating: Measure the turtle from the rear of its shell to the front of its shell. Record its length in both centimeters and millimeters. m c 8. 8 m m 88
Language
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Standard measurement system
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