Josh K. and Ashley Z.: I liked Science class today because we got to measure the mass of a bolt, nail, nut and a marble on a scale. It was also fun using a graduated cylinder to measure the water level. We had to learn to read the water meniscus before we could do this experiment. You have to read it where it dips in the middle. Sometimes the water splashed out of the top of the graduated cylinder. That may make my measurements a little different than what they might be if the water all stayed in the graduated cylinder.-Josh K.

It was fun trying to find the mass on the scale. I also found the volume of the nut, bolt, nail and marble. I used my measurements to find the density of each object. The bolt had the highest mass. It was 42.8 grams. -Ashley Z.

Sarah A. and Erica J.: Science today was very exciting. We learned how to find the mass, volume and density of a bolt, nut, nail and marble. We used a scale to find the mass, a graduated cylinder to find the volume and a formula to find the density of each object. We used the displacement of water to find the volume. I also learned that density never changes. So, if you were to divide the marble in half and find the density of each half, they would still have the same density.-Sarah A .

The thing I like best about our experiment is everything. It was all fun. The scales were easy to use and the the graduated cylinder was cool. You have to be careful when you lower the objects into the glass cylinder. They might break and if some water splashes out, your measurements might not be exact.-Erica J

Jade B. and Erica S.l : The experiment we did today was based on how to find density, mass and how to read water displacement. I think using the water displacement method is an easy way to find the volume of an object. It makes sense. We also learned that density is the relationship between mass and volume. To find density you take the mass divided by the volume. By doing this experiment, I now understand density, mass, and volume and how to find the measurements.-Jade B.

I like doing the density project because I learned a lot from it. The scale was fun to work with and the graduated cylinders were helpful to find the water displacement. This gave us the volume of the objects we measured. To read a graduated cylinder you have to get down and make your eyes even with the water meniscus so you can get a real good reading. I really liked this project and I think everyone should try this someday. You can learn a lot.-Erica S.

Samantha M, and Eleanor V,: The experiment we did today was really fun! I worked with some neat things like a scale and a graduated cylinder. I learned a lot. One thing that I learned is how to measure circular objects or objects that are not shaped like a cube. If you need to find the volume of any object you can use the water displacement method. All you do is write down the first water level in a graduated cylinder and then put the object into the cylinder. After you do that, you write down the second water level. Now, you can subtract the first level from the second and you have the volume of the object. This was one of the best experiments I have ever done.-Samantha M.

Stacey & Kayla

Dusty A. and Derek E.: We worked in the Science Lab today and we did an experiment to find the density of an irregular shaped object. First, we filled a graduated cylinder with 80 mL of water. Next, we tied a string around a bolt. Mrs. Warman gave us a data table so we could record all our measurements. We labeled the object "bolt" and found its mass. The mass of the bolt was 42.7 grams. Next, we read the meniscus on the graduated cylinder. Our first reading was 80 mL. We then lowered the bolt into the graduated cylinder very gently because we did not want to break anything and we did not want any water to splash out of the graduated cylinder. We took a new reading of the water level. The second water level was 85mL. If you subtract the first water level from the second water level you will get the water displacement level. So, 80 mL minus 85mL equals 5 mL. Since 1 mL equals 1 cubic centimeter, we can say that the volume of the bolt is 5 cubic centimeters. Now that we have the mass of the bolt and the volume of the bolt, we can find its density. The formula is: density = mass/volume 42.7grams/5 cubic centimeters = 8.54grams/cubic centimeters

Kayla F. and Jessica R. : I liked Science today because Mrs. Warman gave us the privlege of using the scale, graduated cylinder, a nail, bolt, nut and a marble. It was really fun. We filled the graduated cylinder up to 85mL. We then measured the mass of an object by putting it on a scale. Next, we lowered the object into the graduated cylinder slowly to find the volume by calculating the water displacement. We used those measurements to find the density.-Kayla F.

Dustin T. and Jordan W. : First, we had to find the mass of the object. After we found the mass, we read the water meniscus on our graduated cylinder. We used a data table to record our first water level. Next, we put the object into the graduated cylinder and read the water meniscus. This was our second water level. The water displacement was the second water level minus the first water level. This gave us the volume (the amount of space an object takes up) of that object. For example: We used a nut and a bolt in our experiment. The nut had a mass of 16.5 grams. Our original water level was 84mL and our second water level was 86mL after you put the nut into the graduated cylinder. So, 86mL minus 84mL equals 2mL. That is the volume of the nut or the amount of space it takes up. After you have these measurements, you can divide the mass by the volume and you get its density. So, 16.5grams divided by 2mL equals 8.25g/mL. Since 1mL equals one cubic centimeter, we can say the density of the nut is 8.25g/cubic centimeters. I like this project.-Dustin T.

I worked with Dustin and we learned how to use a scale and how to measure things. I did a test on four things; a nut, bolt, nail and a marble. Dustin and I learned how to find the volume of an irregular shaped object by using water displacement. You can find the volume of a cube by multiplying length times width times height. That's really easy, but you can't do that with something like a nut, bolt, nail or marble. You have to use water displacement.-Jordan W.

Today, we learned how to find the mass, density and volume of an object. I worked with Samantha and we filled a graduated cylinder up to 80mL and dropped the object in and looked at how far the water had gone up from 80mL to get the volume.-Eleanor V.

Jackson & Chris

Ashley & Mike

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