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Metric System Measuring Data Learning Objectives. 1. Identify correct SI units of measurement for length, mass, volume , temperature and area 2. Use metric units to measure various data. Let’s take some measurements!. Metric system.
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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
Metric system • 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
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)
Mass 1 ton dump truck = 1000 kg = 2000 lbs • grams (g) 1 marble = 3 g Volume 1 can of soda = 355 mL • liters (L) Shoe size of 9 (women) = 9.85 in = 25.1 cm Length Shoe size of 9 (men) = 10.25 in = 26 cm • meters (m)
Base unit: meters, grams, or Liters Kate Hudson doesn’t understand doing college math.
Mass • 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
Volume • 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 scale in milliliters (mL)
Volume 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. • 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
Reading a Graduated Cylinder 11.5 mL meniscus What is the volume of the liquid in the graduated cylinder?
Length radius width length diameter • 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
Area • 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 m² 4 x 4 = 16 m²
Temperature Temperature– a measure of how warm or cold an object is with respect to some standard ● Fahrenheit (US) after G.D. Fahrenheit 32°F = freezing 212°F = boiling ● Celsius (rest of world) after A. Celsius 0°C = freezing 100°C = boiling
How do you convert? To Convert to CelsiusTo Convert to Fahrenheit Tº C = Tº F – 32 Tº F = 1.8 (Tº C) + 32 1.8