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Density lab
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Presentation of 1 pages for the course Science at 9th Grade (Density lab)
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1Science Gizmo Report
Jonathan Tanious #20
St. Joseph CES, Markham
Grade 8 Science
Ms. Croce
March 7th, 2022
During the time I was doing this gizmo, I learned a lot about weight, density, buoyancy, mass,
volume, and many more. When me and my partner were using the scale on the gizmo, something
we noticed was that the objects that used denser materials weighed more and also objects that
were large. For example, the gold crown weighed the most because gold is one of the densest
materials so it contributed to it’s weight being so large. Another thing that we noticed when we
were measuring the weight’s was that the objects that were less dense and were smaller had a
much smaller weight. The next thing we used was the volume beaker. While we were using this,
we learned many things about volume and what factors affect an objects volume. Similar to the
scale, we learned that objects made with denser materials and larger objects displaced more
water than objects made with less dense materials and smaller objects. Another thing we learned
while measuring the volume of the objects is that the amount of water a object displaces is not
solely dependent on the weight of the object. A interesting thing that happened that relates to this
was that one of the objects that was 300g, had a higher volume and displaced more water than a
gold crown that weighed over 1900g. We think this happened because the object that was 300g
was larger than the crown so that is our theory. Lastly, the final thing we did on the gizmo was
placing the objects in the water and seeing how buoyant the water is depending on the density of
the water. There were many things that we noticed while we were doing this and we saw some
interesting things. When we made the density of the liquid very low, almost all the objects floated
except for the heavier ones which were only two of them. When we made the liquid density very
high, almost everything sank except for one object and we thought that was very interesting. We
think this happened because the objects displaced an amount of water less than their weight so
that is why they sank. The ones that floated did that because they displaced an amount of water
greater than, or less than, their own weight. Another thing that we learned is that objects with a
high mass and density will sink because the force of gravity is stronger than the force of
buoyancy on the object. In conclusion, we learned a lot during this gizmo about buoyancy,
weight, mass, displacement, volume, and many more.
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