metric system measuring data learning objectives 1. identify correct si units of measurement for...
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Metric System Measuring DataLearning Objectives
• 1. Identify correct SI units of measurement for length, mass, volume, temperature and area
• 2. Use metric units to measure various data
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Let’s take some measurements!
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Scientists use a common measurement system so they can compare their results. Single standard system of measurement is called
the metric system or International System of Units (SI for short)
Only countries that do not use metric system: United States Burma (Myanmar) Liberia
Based on factors of 10
Metric system
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SI Prefixes
Prefix Abbreviation Factorkilo k 0.001hecto h 0.01deka da 0.1base unit 1deci d 10centi c 100milli m 1000
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Base Units
Mass - the amount of matter that makes up an object Unit of Measurement: grams (g)
Volume- the amount space occupied by a solid, liquid, or gas Unit of Measurement: liter (L)
Length - the measurement of something from end to end Unit of Measurement: meter (m)
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1 ton dump truck = 1000 kg = 2000 lbs
1 can of soda = 355 mL
Shoe size of 9 (women) = 9.85 in = 25.1 cm Shoe size of 9 (men) = 10.25 in = 26 cm
Mass
Volume
Length
• grams (g)
• liters (L)
• meters (m)
1 marble = 3 g
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Prefix kilo hecto deka base unit deci centi milli
Abbreviation k h da d c m
Kate Hudson doesn’t understand doing college math.
Base unit: meters, grams, or Liters
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Mass - the amount of matter that makes up an object Unit of Measurement: gram Tools: triple beam balance or scale
Mass is not the same as weight. Weight- the gravitational pull of an object
Ex. Gravitational pull on the moon is less, so we weigh less on the moon (6 times less)
Person who weighs 100 lbs on Earth = 16 lbs on Moon
Mass
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Volume- the amount of space occupied by a solid, liquid, or gas Unit of Measurement: liter (L)
Volume of liquid is measured using a graduate cylinder or a beaker that is marked with a scalein milliliters (mL)
Volume
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Volume For objects with regular shape like a
cube or rectangular prism, we can use a formula to calculate its volume. Volume of a cube = side x side x side Volume of rect. Prism = length x width x height
For irregular shaped objects like a rock, the water displacement method is used. Beaker or graduated cylinder is filled with water to
specific level, object is placed in beaker. Change in water level = volume of object.
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Reading a Graduated Cylinder
meniscus
What is the volume of the liquid in the graduated cylinder?
11.5 mL
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Length- the measurement of something from end to end Under SI system, the base unit for length is
meter (m) Tools: ruler or meter stick, or measuring
tape
Length
diameterlength
width
radius
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Area- the inside shape or space of a an object measured in square units In rectangles and in squares, a simple calculation of length times width will give the number of square units
2 x 2 = 4 m²4 x 4 = 16 m²
Area
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Temperature – a measure of how warm or cold an object is with respect to some standard
● Fahrenheit (US) after G.D. Fahrenheit32°F = freezing212°F = boiling
● Celsius (rest of world) after A. Celsius0°C = freezing100°C = boiling
Temperature
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To Convert to Celsius To Convert to FahrenheitTº C = Tº F – 32 Tº F = 1.8 (Tº C) + 32
1.8
How do you convert?