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METRIC SYSTEM METRIC SYSTEM What is the metric system? A system used to measure length, mass volume and temperature all over the world. It is used by scientists even in the USA. Length How does one measure length in the metric system? What instrument do we use to measure length? What is the base unit for length in the metric system? Using meters or variations of a meter. We use the meter stick The base unit is the meter. There are also smaller units such as cm, mm, and larger like km. Volume What is volume? What is the base unit for volume in the metric system? Volume is the amount of space an object takes up. The base unit for volume is the liter. We can also use milliliters (mL) in science class. VOLUME How do you find the volume of a regular shaped object? Multiply the length by the width, and by the height of the object. Use cm3 as your units of measurement. 1 cm3 is equal to 1mL Example: 10cm x 5cm x 3 cm = 150cm3 VOLUME How do you find the volume of an irregular shaped object? Use displacement (displace water) Steps (in mL) 1. Place a known amount of water in a beaker 2. Put the object in the beaker and record how much the water went up. 3. Subtract the original amount of water from the new. VOLUME What instruments do we use to measure volume with? The beaker The graduated cylinder (most accurate) The flask Beaker, Graduated cylinder and Flask MASS What is mass Mass is the amount of matter (stuff) in an object. The base unit for mass in the metric system is the gram. We use the triple beam balance to measure mass. Don’t confuse mass with weight Mass is a property of an object and does not depend on the object’s location. Weight is a measure of the force of gravity acting on an object, and therefore can vary depending on the object’s location. For example, your body has the same mass on Earth as it does on the moon, but you weigh about six times more on Earth than you would on the moon. Temperature What is temperature? Measure of the average kinetic energy of the particles in a substance. Temperature What is the base unit for temperature in the metric system? What tool do we use to measure temperature? Degress Celsius Thermometer DENSITY What is density? What is the formula for finding density? What are the units for finding density? Density measures how close together the molecules of an object are. Take the mass and divide it by the volume. M/V The units are g/mL HOW TO FIND DENSITY How would I find the density of an apple? 1. Find the mass on the triple beam balance. (g) 2. Find the volume using displacement. (mL) 3. Divide the mass by the volume. g/mL http://www.twigcarolina.com/film s/structure-of-the-earth-3240/