Toggle Navigation
Games
Blog
News
Class PIN
Join for Free
Sign in
Toggle Navigation
Games
PIN
Join for Free
Blog
Pricing
News
Contact us
Help center
Sign in
Study
4th Grade Natural Science: Unit 6 Review
0
%
0
0
0
Back
Restart
We can classify machines into two groups, according to the number of parts they have: _______ machines and _______ machines.
simple; complex
Oops!
Okay!
A rigid bar moves over a point called a _______.
fulcrum
Oops!
Okay!
The fulcrum of a Class 1 lever is _______ the load and the force.
between
Oops!
Okay!
Structures have vertical _______ to support the load.
pillars
Oops!
Okay!
We use _______ or effort to move a load.
force
Oops!
Okay!
We apply the _______ of a Class 3 lever between the fulcrum and the load.
force
Oops!
Okay!
The _______ of a Class 2 lever is between the fulcrum and the force.
load
Oops!
Okay!
_______ machines have one or two parts.
Simple
Oops!
Okay!
Structures have one or more horizontal _______ for the load.
girders
Oops!
Okay!
A _______ is a group of elements that can support load.
structure
Oops!
Okay!
We can classify machines into three groups, according to the type of energy they use: _______ machines, _______ machines, and _______ machines.
manual; electrical; thermal
Oops!
Okay!
_______ machines have many parts.
Complex
Oops!
Okay!
What do we use to lift a load?
a lever
Oops!
Okay!
Your experience on this site will be improved by allowing cookies.
Allow cookies