Experimental Set-up
Measuring the volume of a regular shaped object. Unit of measurement: cm3
Calculating density. Units of measurement: g/ml
How do we measure the mass of a liquid?
Measuring the mass of an irregualr-shaped object.
Reading the meniscus of a graduated cylinder. Units of measurement:ml
Why was Thania drying out the excess water in her graduated cylinder?
Recording data
Determing the volume of an irregular-shaped object
Thania was drying out the excess water in the graduated cylinder because she wanted to get a precise number for the volume of the liquid.
ReplyDeleteHema R. 721
Thania was drying out the graudated cylinder becuase the substance left inside could have been an extraneous variable and could have made the results inaccurate.
ReplyDeleteIn order to find the mass of a liquid you must first place an graduated cylinder or any type of container on a triple-beam balance and find the mass of it. After that you must put the liquid inside the container and measure it again after this time subtract the mass of the container itself from the mass of the container and the liquid.
ReplyDeleteThania was drying out the excess water in her graduated cylinder because she wanted accurate results and the excess water would affect her measurement results.
ReplyDeletethaniia was doiinq that because if she didnt her results wouldnt be accurate and it would have been an extraneus variable
ReplyDeleteTo measure the mass of liquid first you have to measure the mass of the graduated cylinder then you put the liquid in by the way which was water with food colring into the graduated cylinder. Then you measure the mass of the cylinder plus the lquid. The difference of the two mass will be your mass of the liquid.
ReplyDeleteYusuf Khan 721
Thania was drying out the excess water because that would become an extraneous variable to our measurement so she wouldn't have got an accurate answer and she couldn't answer the lab question accurately because the lab is if we can measure accurately using the metric system.
ReplyDeleteYusuf Khan
Thania was drying out the excess water becuase if she didn't her answers would be innacurate. The water would have made the volume of the water bigger then it really could be.
ReplyDelete- Ariana Rosario
Class 721
thania was drying out the excess water because the left over substances may affect her results.
ReplyDeleteIn order to find the mass of liquid you first have to find the mass of graduated cylinder. Make sure the graduated cylinder is compeletly empty other wise it will be an extraneous variable. Next pour the liquid in and measure the mass again. To find the mass subtract the mass of the graduated cylinder from the mass of the liquid and graduared cylinder.
ReplyDeleteThania is cleaning the graduated cylinder so she won't have an extraneous variable.
To find the mass of a liquid, you have to measure the mass of the graduated cylinder, first, by placing it on a triple beam balance. After finding the cylinder's mass, place the liquid into the cylinder, and place the cylinder on the triple beam balance. After you have found the new mass, subtract the mass of the g.c + the liquid, by the mass of the graduated cylinder, it self.
ReplyDeleteMass of a liquid:
g.c +liquid - gc(alone)
I agree with Kirandeep when she said that Thania was cleaning out the graduated cylinder to prevent having an extraneous variable.
ReplyDeleteThe reason to why Thania was drying out the execess water because the left over water may affect her results. The extra water in the graduated cylinder would be the extraneous varieble. If she were to leave the excess water in the graduated cylinder then she would not get accurate results.
ReplyDeleteTo find the mass of the liquid, you would have to find the mass of the graduated cylinder and then add the liquid and check the mass of that then subtract both result and that will give u the mass of the liquid
ReplyDeleteIn order to measure the mass of a liquid, follow these steps:
ReplyDelete1. Measure the water in the container.
2. Measure the container without the water.
3. Subtract the measurement of the water with the container by the measurement of the container.
Thania was cleaning out the graduated cylinder because the classes before us left some reminisce and we want our data to be accurate. This would have been an extraneous variable.
This is a response to: Why was Thania drying out the excess water in her graduated cylinder?
ReplyDeleteWell basically the others have already said it. It seems that next time I might have to be quicker when trying to be the first person to blog.
To sum it up Thania had to clean out the graduated cylinder to prevent that from being an extraneous variable. And just in case you do not know what an extraneous variable is it is basically an undesirable variable that influences the relationship and most likely the outcome between the variables that an experimenter or scientist is examining or experimenting.
Thania was drying out the excess water because the leftover water can create incorrect results, the water could make the mass increase, and it can create an extraneous variable because you wouldn't know why you got those results from measuring the mass.
ReplyDeleteThania was drying the excess liquid, so ot would not become an extraneour varible which the my other classmates said. I agreed with nalini and Rahul when they explained how to measure the mass of a liquid...
ReplyDelete