the different measuring devices for length, volume, mass, time, and temperature and their proper usage. Why do you think it is a must to know the differences among the devices?
Measuring Devices: ruler, meter stick, or tape measure
Proper Usage:
Choose the right tool to measure length. For shorter lengths, use the ruler while for longer lengths, we may use a meter stick or tape measure. Ruler and meter stick are the appropriate tools to measure rigid straight lengths while tape measure is for flexible straight surfaces. To use these tools, make sure that one end of the object being measured is at exactly 0-mark. We have to remember that the 0-mark is not always located at the exact starting edge of the measuring tool. Extend the measuring tool over the entire length until we reach the other end of the intended length. Record that length by indicating the whole number first. If the end lands between two whole numbers, use the lesser of the two values. Then, count the lines after that number. Express this as a decimal number.
In measuring liquid, we make use of a dropper for a small amount of liquid and a graduated cylinder for large amounts of liquid. In using these devices, we pour the liquid into these devices. Then, check the lower meniscus of the liquid. Record the reading.
In measuring regular solids, we can make use of a ruler. The volume of a regular-shaped solid is getting length, width, and height using the ruler then multiplying these quantities (LxWxH)
In measuring irregular solids, we use the water displacement method. In the water displacement method, we put water on the graduated cylinder and get its initial volume. Then, the irregular solid is added to the cylinder. We then get the volume again. We get the displacement or the increase in volume by subtracting the initial volume from the initial volume.
MASS
Measuring Devices: weighing scale, balance
Proper Usage:
In getting mass using the weighing scale, we see to it that the scale is at the 0-mark. Then, place the object on the scale and record the weight.
A balance, on the other hand, helps determine mass by balancing an unknown mass against a known mass. There are different kinds of balances. For some balances, we place the object to be weighed on a pan on one side of the scale. Then we move the knobs that serve as weigh to balance the object being measured. When we achieve already a balance, we record the mass of the object.
TIME -
Measuring Device: stopwatch
Proper Usage:
In using a stopwatch, we make sure that we start with 0. We can do this by resetting it. Then click start to measure the time and click stop once finished. Then, record the time.
TEMPERATURE -
Measuring Device: thermometer
Proper Usage:
There are different kinds of thermometers. Before we have the mercury thermometer but nowadays, digital thermometers are commonly used. To use digital thermometers, we start with 0-mark prior to using it. Then record the temperature indicated.
Why do you think it is a must to know the differences among the devices?
It is important to know the differences among the devices so that we will be able to know which device to use in measuring a specific quantity. For instance, if we want to measure length, definitely, we cannot use the thermometer nor time nor volume. More than knowing which device to use, it is important also to know how to use these devices correctly. Since there are different devices available, proper usage or correctly using the device would mean reading the manual or instructions prior to using it. Correct devices and correct use of the devices will give us accurate measurements which are essential.
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Measuring Devices
LENGTH:
Measuring Devices: ruler, meter stick, or tape measure
Proper Usage:
Choose the right tool to measure length. For shorter lengths, use the ruler while for longer lengths, we may use a meter stick or tape measure. Ruler and meter stick are the appropriate tools to measure rigid straight lengths while tape measure is for flexible straight surfaces. To use these tools, make sure that one end of the object being measured is at exactly 0-mark. We have to remember that the 0-mark is not always located at the exact starting edge of the measuring tool. Extend the measuring tool over the entire length until we reach the other end of the intended length. Record that length by indicating the whole number first. If the end lands between two whole numbers, use the lesser of the two values. Then, count the lines after that number. Express this as a decimal number.
VOLUME
Measuring Devices: dropper, graduated cylinder, ruler
Proper Usage :
In measuring liquid, we make use of a dropper for a small amount of liquid and a graduated cylinder for large amounts of liquid. In using these devices, we pour the liquid into these devices. Then, check the lower meniscus of the liquid. Record the reading.
In measuring regular solids, we can make use of a ruler. The volume of a regular-shaped solid is getting length, width, and height using the ruler then multiplying these quantities (LxWxH)
In measuring irregular solids, we use the water displacement method. In the water displacement method, we put water on the graduated cylinder and get its initial volume. Then, the irregular solid is added to the cylinder. We then get the volume again. We get the displacement or the increase in volume by subtracting the initial volume from the initial volume.
MASS
Measuring Devices: weighing scale, balance
Proper Usage:
In getting mass using the weighing scale, we see to it that the scale is at the 0-mark. Then, place the object on the scale and record the weight.
A balance, on the other hand, helps determine mass by balancing an unknown mass against a known mass. There are different kinds of balances. For some balances, we place the object to be weighed on a pan on one side of the scale. Then we move the knobs that serve as weigh to balance the object being measured. When we achieve already a balance, we record the mass of the object.
TIME -
Measuring Device: stopwatch
Proper Usage:
In using a stopwatch, we make sure that we start with 0. We can do this by resetting it. Then click start to measure the time and click stop once finished. Then, record the time.
TEMPERATURE -
Measuring Device: thermometer
Proper Usage:
There are different kinds of thermometers. Before we have the mercury thermometer but nowadays, digital thermometers are commonly used. To use digital thermometers, we start with 0-mark prior to using it. Then record the temperature indicated.
Why do you think it is a must to know the differences among the devices?
It is important to know the differences among the devices so that we will be able to know which device to use in measuring a specific quantity. For instance, if we want to measure length, definitely, we cannot use the thermometer nor time nor volume. More than knowing which device to use, it is important also to know how to use these devices correctly. Since there are different devices available, proper usage or correctly using the device would mean reading the manual or instructions prior to using it. Correct devices and correct use of the devices will give us accurate measurements which are essential.
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