So in Term 3, I got
an alternative assessment to make a Science video. I compile some experiments
and some of our alternative assessment. There are one of the
example of separating techniques which is sublimation, we do the experiment on
it with dry ice. There's also our experiment on motion of a pendulum. And
we have 2 annual projects which are making a complex machine and making a
structure of the earth from clay and we also made a poster on ways to save the
environment. I'll tell you shortly what each of them means before I'll show you
the video
Sublimation
Sublimation is where a solid changes directly to a gas
state. It's technique is usually use to purify substances. The dry ice is one
of the example of using sublimation in daily life, dry ice is use to keep ice
cream cold when it is not refrigerated.
Motion of a Pendulum
A pendulum consists of a metal bob suspended by a string
from a fixed support. It is normally used in clocks and to measure time. The
length of the string in a pendulum also affects its swing. The longer the
string, the longer time the pendulum takes to make one swing.
Complex Machine
Before a complex machine, yous should start with the basic
first which is simple machine, the basics of simple machine consists of lever,
pulley, wheel and axle, inclined plane and gears. In higher levels, it's
divided into more complicated parts. The complex machine is a combination of
some or all of them, an airplane is one of the example.
Structure of the Earth
The earth consists primarily of the crust, mantle and core.
The crust is the thinnest, top layer of the Earth. The mantle is the layer
beneath the crust. The core is the innermost layer of the Earth's Structure.
Now, I think that you're ready, here's the video that me and
my group mates had made:
