Earth Space Science Name: ______________________Date:______Pd:____ TOOLS FOR MEASUREMENT LAB Introduction During laboratory investigations, you are often required to make measurements of length, mass, and volume. You need to know the proper pieces of equipment to select and the procedures and units to use. Length Measurement Typically, a metric ruler is used to determine the length of an object. The basic unit of measure for distance is the meter. Volume Measurement Volume measures the space occupied by matter. The basic unit of volume is the liter. Solid, regular shaped objects can have their three dimension measured to calculate volume (v = length x width x height). A liter = 1000 cm3. A graduated cylinder is often used to measure a liquid’s volume. Water and many other fluids form a meniscus (curving surface) when placed in the narrow tube of a graduated cylinder. To correctly read the volume of the liquid, place the cylinder on a flat surface. Then read from the bottom of the curved meniscus at eye level. To find the volume of a solid, you can also use a graduated cylinder. Place a known amount of water in the cylinder and then place the solid in the cylinder. The amount of water displaced by the solid (the difference in water level) will be the volume of the solid object. This will not work if the solid floats on the water. “difference in water level” means you subtract the original volume of water in the graduated cylinder from the new volume of water after you placed the solid in the graduated cylinder. Mass Measurement In the laboratory, mass (the quantity of matter in something) is often measured with a balance, which is a tool that works by comparing an object of unknown mass with an object of known mass. The triple-beam balance or an electronic balance is typically found in a high school laboratory. The basic unit of mass is the gram. Density The density of an object is the amount of matter found within the object’s volume. This can be calculated using the formula Density = mas /volume Density = mass ÷ volume D=m/v ____________________________________________________________________________________ Distance: 1. Measure the length of a lab table and record the measurement. ________m 2. Change this measurement to _______cm. Change this measurement to ________mm. 3. Measure the width of the lab table and record the measurement. ________m 4. Change this measurement to ________cm. ___________mm. 5. Measure the length of the room in meters. ________ m Change this to kilometers _________ Km Volume: Choose a volume of water to put in graduated cylinder: ___________ mL 1. Now, add a rock to the graduated cylinder : ___________mL Total volume of the rock, your original volume you chose minus the new volume after adding the rock: __________ mL Change this to ____________L Original volume of water in cylinder: ___________ mL 2. New volume of water after adding copper wire: _________mL Total volume of the copper wire: _________mL __________L Mass: Weigh the following materials. 1. Sharpie ________g Change this to __________Kg 2. rock ________ g Change this to _________Kg 3. copper bundle ________ g Change this to _________Kg Density: show your calculations before the final answer 1. The density of the copper bundle ___________________________________= ___________g/cm3 2. The density of the rock ___________________________________________ = __________ g/cm3 Calculations for #1 Calculations for #2