A wheel and axle is a simple machine that can help you move, turn or _________ and object.
What is lift
100
A pulley is a simple machine that makes lifting __________
What is easier.
100
An inclined plane is different from other simple machines because it does not ___________.
What is move.
100
A screw is an inclined plane that is wrapped around a central core to form a ______________.
What is spiral.
200
Three things a lever needs are: Load, Fulcrum, and
What is Effort Force
200
When the wheel turns one time, the axle also turns ______________
What is one time.
200
There are three different kinds of pulleys: Fixed pulleys, movable pulleys and ______________
What are combined pulleys.
200
A tool the Inuit used in the Canadian Arctic that has many uses, such as removing the fur from animals or taking the skin off fish.
What is an ulu.
200
Over 2,000 years ago, a mathematician named Archimedes invented a screw that could be used to lift ___________.
What is water.
300
A bottle opener is an example of a _______________ lever. It is when you use effort force in one direction, the load travels in the same direction.
What is a second class lever.
300
The rod part of this simple machine is called the__________.
What is the axle.
300
A ___________ gives you a mechanical advantage because you change the direction of your effort force.
What is a fixed pulley.
300
When you push down on a wedge to cut, the edge of the wedge splits the object ___________.
What is apart.
300
The top of a screw is called the 'head' while the bottom, spiral part, is called the _____________.
What is threads.
400
A lever is a straid rod or board that turns around a ____________.
What is a fixed point.
400
___________ were the earliest form of the wheel and axle. ___________ were used by the ancient Egyptians to move the large blocks of stone the used to build the pyramids.
What is rollers.
400
Fixed and movable pulleys can be combined to create a _____________________
What is a combined pulley.
400
The advantage to pushing something up an incline plane is that you use less effort force to raise an object. The disadvantage to pushing something up an inclined plane, is that you must move the object a greater _____________.
What is distance.
400
When you are turning the head of a screw into a block of wood, the screw acts like a ___________, pushing the wood apart.
What is a wedge.
500
A __________________ gives you a mechanical advantage by changing the direction of the force you use. An example of this type of lever is a see saw.
What is a first-class lever.
500
Cars and bicycles use wheels and axles to move. The effort force is at the axle, and the load is on the ____________.
What is the wheel.
500
Another name for a combined pulley is _________________
What is a block and tackle.
500
Most wedges are two inclined planes put together. These wedges are used to split apart objects. Other objects have only one inclined plane. These wedges are used to life objects, or to _____________ objects from moving.
What is stop
500
When the threads of a screw are closer together, you use less effort force to put the screw in the wood because the length of the ______________ is longer.