Reason 1: helps scientists share and compare their data/ results Unit 1: Nature of Science. Measurement. Today most scientists, in almost all countries use the International System of Units (SI units) as their system of measurement. Reason 1: helps scientists share and compare their data/ results Reason 2: Another advantage of SI units is all units are based on the number 10; meaning they are easily converted from one unit to another

Unit 1: Nature of Science. Measurement. Length: the distance from one point to another Basic SI Unit of length: meter Base unit symbol: m Tool used to measure length: meter stick

Unit 1: Nature of Science. Measurement. Volume: The amount of space that matter occupies. VOLUME OF A LIQUID Basic SI Unit of liquid volume: Liter Base unit symbol: L Tool used to measure liquid volume: graduated cylinder

Volume of REGULARLY SHAPED SOLID OBJECTS Unit 1: Nature of Science. Measurement. Volume of REGULARLY SHAPED SOLID OBJECTS Basic SI Unit of solid volume: cubic centimeter Base unit symbol: cm3 Tool used to measure solid volume: meter stick To calculate solid volume: L x W x H

Unit 1: Nature of Science. Measurement. Mass: is the amount of matter that something is made of Basic SI Unit of mass: gram Base unit symbol: g Tool used to measure mass: triple beam balance

Volume of an Irregularly Shaped Object Unit 1: Nature of Science. Measurement. Volume of an Irregularly Shaped Object Basic SI Unit: cubic centimeter Base unit symbol: cm3 Tool used to measure volume of irreg. solid: graduated cylinder

Unit 1: Nature of Science. Measurement. Water Displacement method: Volume of liquid after object has been submerged - Original Volume of liquid in grad. Cylinder Answer is volume of irregular solid object (mL = cm3) Dora Example 48 mL 44 mL 4mL = 4cm3

Unit 1: Nature of Science. Measurement. Weight: is a measure of the force of gravity on an object Basic SI Unit of weight: Newton Base unit symbol: N Tool used to measure weight: spring scale

Unit 1: Nature of Science. Measurement. Mass vs. Weight Mass DOES NOT change with location, weight DOES! Weight takes into account gravity, mass does not.

Unit 1: Nature of Science. Measurement. Temperature: is a measure of how hot (or cold) something is. Specifically, the measure of average kinetic energy of the particles in the object. Basic SI Unit of temperature: Degrees Celsius Base unit symbol: °C Tool used to measure temperature: thermometer

Unit 1: Nature of Science. Measurement. Time: the measure of a passing interval, from one event to another Basic SI Unit of time: second Base unit symbol: s Tool used to measure time: stopwatch