A ruler or tape measure.
depends on what item you are measuring
The answer depends on what characteristic the tool is used to measure.
You need different tools these measurements. For mass you want a scale or balance. You can only use the same tool for length and volume (a ruler, caliper or similar) if the object you are measuring is a well defined solid with known geometric shape. Otherwise you will have to perform a measuring experiment for example put the object you want to determine the volume of in a graduated cylinder, pour a known volume of liquid into the cylinder, read the volume and subtract to determine the object's volume.
Use a string: put your finger where the string is at the edge of the object, then use a ruler to measure the tip of the string to your finger. Or use a protractor: each degree equals 1/16 of an inch.
A ruler can be very helpful.
A ruler or tape measure.
a ruler is something that measures the length of an object
To find the volume of an object, you typically need to measure the object's dimensions, such as length, width, and height. You then use these measurements to calculate the volume using the appropriate formula based on the shape of the object (e.g., for a rectangular object, volume = length x width x height). A measuring tool, such as a ruler or tape measure, may also be needed.
You could use a ruler or a measuring tape to measure the length of an object. Both tools have markings that allow you to accurately determine the distance from one point to another.
scale
SI UNIT Usually, at a normal classroom size, the tool to use would probably be to measure it in either yards or meters. TOOL A yard stick
You can use multiple measuring tools to measure different sections of the object and then add those measurements together to get the total length. Another option is to estimate the additional length by visualizing the extension of the object beyond the measuring tool and then adding that estimate to the measured length.
a scale or a balance
the tool of length is a RULER!
A strain gauge.
A balance is the correct tool to use to find the mass of an object.