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Si: System International • Most popular and precise system of measurement in the world. • Logical and easy to use • Based on the powers of ten/metric system • Meters, liters, grams, newtons, celcius units of measurment Length • Basic unit is the meter • When split into 100 parts is the centimeter • A ruler of meter stick is commonly used Water Displacement • Water displacement is used to find the volume of an irregularly shaped object • Fill a graduated cylinder with water and note volume. (watch the meniscus) • Drop in the object, note the water level • Find the difference in water levels Volume • The amount of space a substance occupies • Graduated cylinder is used to find the volume of an irregular solid or liquid. Fluid is curved inside the cylinder (meniscus), you need to look at the bottom of the curve for the measurement • To find volume of a regular solid (like a cube) you multiply the length*width*hiegth • Volume is measured in ml, cc Mass • • • • The amount of matter in an object Basic unit is the gram Mass is measured using a triple bean balance Mass never changes Weight • Weight is the amount of gravitational pull on an object, (it is not the same as the mass) measured in newtons, it does change. Density • Mass per unit of volume • Water has a mass on 1 g/ml Temperature • Celsius based on one hundred • Zero freezing and 100 boiling of water Changing units • When going from small to large units, you multiply by 10 every step • When going from large to small units, you divide by 10 every step Scientific Notation • 5,980,000,000,000,000,000,000,000 • 5.98 X 10²⁴ • 0.000006 • 6 X 10 ‾⁶ https://www.youtube.com/watch?v=cr7roogzM8c