P.S. 28M, The Wright Brothers School |Type Your Name Here | |
|Class 000 |March 25, 2012 |





Materials: Worksheet, pencil, highlighter, Computer

PART 1: WORK AND ENERGY

WHAT WE WANT TO KNOW...
. What is a scientist's definition of work?
. What is force?
. What is energy?


Click here to watch a short video about work and energy.

Done? All right! I hope you learned the answers to all of the questions
we wanted to know! Show what you learned by filling in the blanks below.
If you need to watch the video again, just click on it again! You can
watch it as many times as you need to.

To a scientist, work is done only when a __________________ is used
to move an __________________. If Axle the Robot tries to move a heavy
weight and the weight doesn't go anywhere, then Axle has done no work; a
boy picking up a pencil has done more work. The boy has used force, which
is either a __________________ or a __________________, to move an object.
__________________ is the ability to do work.

PART 2: THE SIX SIMPLE MACHINES

WHAT WE WANT TO KNOW...
. What do the six simple machines look like?

Click here to see what each of the simple machines look like.

Then, show what you learned by filling in the blanks:

Too fast for you? Remember, you can pause the video at any time! Just
click on the button with the two little lines that look like a sideways
equal sign. To start again, click on the button with the triangle.

Show what you learned by sketching a quick picture of each simple machine
in the boxes below:
|inclined plane |wheel and axle |pulley |
|screw |wedge |lever |


PART 3: THE LEVER

WHAT WE WANT TO KNOW...
. What are the three different parts of a lever?
. How do the three different classes of levers work?


Click here to learn about the three different parts of a lever.

Then, show what you learned by filling in the blanks:

1) Every lever has _______ parts.
2) The object or weight being moved is called
the_____________________________________.
3) The push or pull needed to move the object is called
the_____________________________________.
4) The point on the lever where direction and movement changes is called
the_____________________________________.













Now, click here to learn about the three different classes of levers!


There are ______ different types, or classes, of levers.


|1. |1. |
|In a _________________________ class lever, | |
|the __________________________ is between | |
|the ______________________________ and | |
|the _________________________________. | |
|2. |2. |
|In a _________________________ class lever, | |
|the __________________________ is between | |
|the ______________________________ and | |
|the _________________________________. | |
|3. |3. |
|In a _________________________ class lever, | |
|the __________________________ is between | |
|the ______________________________ and | |
|the _________________________________. | |









PART 4: THE WHEEL AND AXLE .

WHAT WE WANT TO KNOW...
. How long have people been using wheels?
. A wheel is like what other simple machine?
. What are some examples of wheels and axles?

Click here to watch a short video about the wheel and axle.

Then, show what you learned by filling in the blanks:

There is evidence that people were using wheels ________________ years
ago!


A wheel and axle is like a ___________________ that has been wound up.


Examples of wheels and axles:


. _______________________________________________________
. _______________________________________________________
. _______________________________________________________
. _______________________________________________________


PART 5: THE PULLEY

WHAT WE WANT TO KNOW...
. What are the different types of pulleys and how do they work?

Click here to learn all about pulleys.

Then, show what you learned by filling in the blanks:

. A pulley has a _____________________________ built into it.


. There are ______ kinds of pulleys.


. A ______________________ pulley does not make the work easier, but
what it does is
_______________________________________________________.
. A ______________________ pulley moves with the object being lifted.
It only takes ______________________ the effort to lift something.
. More than one pulley can be used together to lift something very
heavy.
This is called a _________________________________________________.


PART 6: THE INCLINED PLANE

WHAT WE WANT TO KNOW...
. How do inclined planes make work easier?
. How are inclined planes used?
. What is the easiest way to get up a steep hill?

Click here to learn about inclined planes.

Then, show what you learned by filling in the blanks:

1)