Buoyancy
Buoyancy
- Buoyancy is to do with whether a certain object is able to float on
water.
How Do Ships Float?
A
ship is a watertight vessel that can travel long distances over
water and provides transport and leisure.
Ships
come in many shapes and sizes and are constructed from many different
materials such as wood, steel, concrete, or fibreglass. A ship
consists of: a hull (body), a bow (front), a stern (back), port
(left-side), starboard (right-side).
Firstly,
the density of a ship determines whether a ship will float or
sink. Density refers to the proportion of weight to volume. When
the density of a ship is less than the density of the water, the
ship will float.
The
second key to floating is that the ship must displace an amount of
water equivalent to its own weight. Displaced water creates a
strong force that pushes the hull upward to keep the ship stable.
Additionally the water around the ship thrusts back because of the
air in the atmosphere pushing down on it, therefore lifting the
ship.
Both
of these factors influence a ship's ability to float.
Boat Design
- I mainly used foil for my boat design. I used three layers of
foil. I chose my design of a large gondola due to the fact that I
had a gut feeling that my boat would hold a vast amount of coins.
Forty-one or so coins were able to be placed in my boat.
Evaluation
- My boat worked the way that I had expected it to. The only thing
that I could improve is to make the walls a little higher so when
the boat submerges a little bit of water does not
go in. The boat
worked due to its lightness and size.
Learning
Process & Self Evaluation: |
I
have learnt: |
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My
effort for this task has been: |
Quality |
My
best work |
Could
do better |
ü |
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Comment:
After an hour or so I
was quite happy with my design. I started off
knowing what I was doing and I finished knowing what
I was doing. I think that is what made my boat a
success. |
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Teacher Evaluation: |
Indicator |
Progressing
Towards |
Achieved |
Working
Beyond |
Science
& Technology |
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Develops
and resolves a design task by planning,
implementing, managing and evaluating the design
process |
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ü |
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Conducts
own investigation and makes judgments based on the
results of observing, planning, testing and
drawing conclusions |
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ü |
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Presentation |
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Published
work has been checked for errors |
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ü |
Effective
use of font size and style and page layout |
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ü |
Comment:
Well done Mariam. Your boat design was very
successful so obviously you have learnt a lot about
what it takes for something to be buoyant.
Miss Best |
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