an instrument made from a drinking straw, a protractor,  a string and a rock is most likely used to measure...
468079
... the height of an object.\n\nTo construct the instrument:\nAttach the straw to the protractor along one of the 0 degrees lines. Attach one end of the string to the point where the angle lines meet (the center of the circle, if you were to have two protractors put together). Attach the rock to the other end of the string.\n\nTo use the instrument:\nLooking through the straw, find the top of the object of unknown height. Without moving the instrument, read the angle that the straw and string make from the protractor. Measure the distance from you and the object of unknown height.\n\nTo calculate height:\nUse geometry.
12783
i belive it is a type of plant or reed or something it almost sounds like a trick question unles you read the specifics then again it could be made of small metal prongs like some cat and other animal brushes
824559
Mass is measured in grams.
183163
If you have two magnetic rings (that have two opposite sides) you put them through a straw. One ring levatates above the other because of the force that pulls them apart. It's kind of hard to explain. I hope this makes sense.
123209
It's like a spork/knife.. It has three prongs.. It's cupped like a spoon and it has a cutting edge..
459949
a gum wrapper and some rhinstones
850240
What you describe looks as if it is a gum from the tree(usually)which has settled on the rock and has the natural salts of the rock diffused into it . If you are still in trouble then go to the nearest research Lab to get the exact details of the elements present in this specimen.
236087
A instrument used to measure angles is a PROTRACTOR and a gross is dozen dozen which is 144.
953535
thermometers, barometers, flouescent lamps, batteries.
542238
a very slender graduated cylinder with markings for individual mL.
1015298
Various types of rocks have unique structural and physical properties that allow geologists to identify them.  Using remote sensing equipment, those physical properties would register as a particular reading from the machine's output.  Geologists would relate their findings to general characteristic analysis and determine the type of rock or mineral being examined.
606464
Petrology is a large area, what kind of instruments do you have in mind? Supply further detailed info.
902699
Duct tape, a chair, and a large wooden spoon
136243
measuring device of some sort (scale, ruler, thermometer)
50470
It's called a flow meter.
1176031
an anameter  -it is used fr measuring current passing through the circuit.\n\n conical flask -its flat bottemed used to hold liquids in reactions where heating is not required.\n\nburette -used to add one solution to another and also acurately measures the amount of liquid used.\n\ndropper pipette -used to add small but accurate amount of liquid to another.\n\nfunnel - used to carry out filtration.\nboiling tube-made of thick resistant glass used fr strong heating.\n\nround bottemed flask-used to hold liquids in reations where heating is required.\n\nwatch glass-holds solids\n\nevaporating dish-it can be gentely heated\n\nmortar and pestle-fr grinding and mixing solids\n\ngud luck!hope it helps
152758
The measure magnetic fields with a magnetometer.