Scientists never just grab a handful of chemicals and then toss them together architects and engineers never just grab a certain length of object just to make or just to build houses and buildings accurate precise measurement is a fundamental component of a good science magandang aro future measurements in research, types of scale in researchers this is me again featured in me i’m kasama mo at gaga bay say yo yo blizzard’s journey welcome back to our youtube channel don’t forget to subscribe like and hit the notification bell for more updates in our subject in measurements in research, types of scale in research we are now in our week 3 module t in measurements in research, types of scale in research 1. last time we discuss about the most fundamental basic process skill which is observation from that last one you were able to explain the importance of observation based on the empirical nature of science and you were able to demonstrate the skills in observing in a given event or object this lesson you should be able to use the most appropriate tools in measuring objects in this lesson vlog we’re going to talk about the traditional tools in measuring and inducing in scientific investigation but before that let us define first the second basic science process skill which is measurement do you have any idea what measurement is what is measurement measuring is important in collecting comparing and interpreting data it helps us classify and communicate with others and always remember that we have the metric system which is the metric system should be used to help students understand the scientific world measuring is critical in the collection comparison and analysis of data it allows us to identify and interact with others the metric system should be used to help understand the world of science measuring is one of the science basic process skills essential in doing an experiment and it is considered as quantitative data scientists never just grab a handful of chemicals and then toss them together architects and engineers never just grab a certain length of object just to make or just to build houses and buildings accurate precise measurement is a fundamental component of a good science accurate precise measurement is a fundamental component of a good science we have these two term precise and accuracy which we’re going to use in this lesson in measurement when we say accuracy it means this is the closeness of measurement to the true value of what is being measured but when we say precise it means that this is the exact amount of measurement meaning to say when we say precise it is neither more or less but exactly measuring the properties of objects and events may be accomplished by direct comparison or by indirect comparison with arbitrary unions which may be standardized for communication purposes by doing such a measurement learners may be able to develop skills such as order properties of objects by means of measuring devices without regard to quantitative units compare the quantities of arbitrary units such as length area volume and weight another thing is use standard units for measurements select one system of units for all related measurements identify measurable physical quantities and convert from one system units to another in doing such experiment it is very important that we know what appropriate tools should be used in measuring it is very important for us to have a precise and accurate measurement there is appropriate laboratory equipment for every measurement just like the beaker we use beaker to measure the volume of a certain substance but we cannot use the beaker to measure the length of a certain object we also have the ruler to measure the length of a certain object but we cannot use the ruler to measure the volume of a certain substance we also have the triple beam balance to measure the weight of a certain solid material on solid object but we cannot use the triple beam balance just to measure the volume of your milk now let us have measuring tools for measuring the volume we have beakers and erlenmeyer flask beakers and erlenmeyer flask the vessels on this list may be bigger than others but they offer nothing but crude readings in addition beakers and flasks often do not even have markings graduated on their sides therefore they are only used as containers only so as you can see we can use this as container and storage of substances during experiment we also have graduated cylinder graduated cylinder these are tall narrow vessels a graduated cylinder’s degree of accuracy is marginally higher than the beakers and flask within one percent they weigh liquids next we have the buret bireth is one of the most accurate glassware for measuring volumes it is highly accurate this type of volumetric flask or glassware is found in three different sizes it can be 10 ml 50ml and 100 ml their precision is within 0.
01 ml we also have the pipette pipette is a kind of volumetric glassware that is designed as very long and narrow glass tubes the level of its accuracy is highly accurate their accuracy depends in part of their height which is between 12 to 24 inches in length the pipette graduations that measure liquids within a range of 0.02 ml next we also have the dropper dropper is a device used to transfer small quantities of liquids sometimes it is also known as the pasture pipette also known as the dropper okay and they are used in a laboratory and also to dispense small amounts of liquid medicines a very common use was to dispense eye drops into the eye so this is the dropper now let’s proceed with uh laboratory tools for measuring the length width and height number one we have the tape measure tape measure is flexible ruler used to measure size or distance a tape measure or measuring tape is consists of a ribbon of cloth plastic fiberglass or metal strip with linear measurement markings it is also common measuring tool this is the tape measure next we also have this vernier caliper a vernier caliper is a precision instrument that is highly accurate in measuring internal and external distances it is a measuring device used to precisely measure linear dimensions it is very useful tool to use when measuring the diameter of round objects like cylinders and used to reduce human estimation error next we also have this micrometer caliper a micrometer caliper is a tool that integrates a calibrated screw commonly used for accurate component measurement in mechanical engineering and machining as well as most mechanical trades along with other metrological instruments such as dial vernier and automated calipers so this is a micrometer caliper we also have the ruler ruler is a device used in geometry and technical drawing as well as engineering and construction industries to measure distances or draw straight lines so this is very common the most common instrument that can be used in measuring the length or weed of a certain object next is the meter stick a meter stick is either a straight edge or foldable ruler used to measure length and is commonly especially common in the construction industry so this is a meter stick which uh usually have the length of one meter next let’s now proceed with um laboratory tools for measuring the mass we have the analytical balance analytical balance is common piece of scientific laboratory equipment this is highly sensitive instruments that can measure up to 10 000 or even 100 thousands of gram meaning to say this is very accurate next we have the centigram balance a centigram balance uh somehow look like the analytical balance but when we say centigram balance it is this is a metric unit equal to one tenth of a gram the scale will weigh objects to 0.
01 grams at the nearest it increases effectiveness when calculating an object’s weight next we also have the platform balance a platform balance has two platforms balanced on or suspended from cross arm and weights are placed on one platform before the item is weighted in the balance platform balances are simple machines and they are convenient because they do not require any power to work next we also.
Have the triple beam balance a triple beam balance is a kind of scale that uses counter weights to counterbalance the sample in the pan on a three rider beam this is a triple beam balance and this is commonly used in school laboratory now let’s proceed with laboratory tools for measuring gas so actually there are lots of measuring tools that can measure the gas but let us have this this is what we call the a geometer so geometer is a laboratory device that measures the change in volume of a gas mixture following a physical or chemical change so this is the audimeter next we also have this pressure gouge it is an instrument for measuring the condition of a fluid liquid or gas that is specified by the force that the fluid would exert when at rest on a unit area such as pounds per square inch or newtons per square centimeter and we also have this one are you familiar with this this is what we call the ndir or ndir sensors or the non-dispersive infrared carbon dioxide sensors so what is this this ndir sensors are spectroscopic sensors to detect carbon dioxide in a gaseous environment by its characteristic absorption the key components are an infrared source a light tube an interference or wavelength filter and an infrared detector the gas is pumped or diffuses into the light tube and then the electronics measure the absorption of the characteristic wavelength of light ndir sensors are most often used for measuring the carbon dioxide next we have the carbon dioxide sensor or the cm110 6s it is a single beam ndir carbon dioxide sensor module based on non-dispersive infrared or the ndir technology which can detect carbon dioxide concentration of indoor air so with high accuracy high stability small size and it is widely used for ventilation system air purifier air conditioner iaq monitor and et cetera discussion about the traditional measuring tools stay tuned in our channel because in our next lesson vlog we’re going to discuss about the difference between micrometer.
Caliper and a vernier caliper don’t forget to subscribe like and hit the notification bell for more updates in measurements in research, types of scale in research again this is titrating may and see you on our next vlog bye um.
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