Bridges
Structure and Force
Levers and Tools
Past Classes (Natural Science)
100
The most basic type of bridge is a __________ bridge.
Beam
100
In a library, this horizontal plane is where the books rest.
Girder
100
This mechanism is a __________.
Crank
100
Matter can change in two ways: Chemical and __________
Physical
200
These types of bridges are common in Europe
Arch
200
In a library, the books weigh a lot. They are the _________ in the structure.
Load
200
This is an example of a __________ lever.
Pulley
200
Chemical changes happen by oxidation, fermentation and ____________. Fireworks are an example of this chemical change.
Combustion
300
The Brooklyn Bridge is a _____________ bridge.
Suspension
300
The vertical plane in a library is called a __________.
Pillar
300
This object is a wheel with teeth on the edge. They are usually found in motors and clocks.
Cogs
300
You have two of these organs. They are responsible for filtering the body´s blood.
Kidneys
400
This type of bridge is a ___________ bridge.
Cantilever
400
The elbow is an example of a ________ class lever.
Third
400
The center of a wheel is called the ________.
Axle
400
This force pulls objects down towards the Earth.
Gravity / Gravitational Force
500
These types of bridges are easy to remember, because they often have triangles in their shape.
Truss
500
FLE
123
The First Class Lever has the ________ in the middle.
Fulcrum
500
An axe (hacha) has two inclined planes coming together. This type of tool is a _________.
Wedge
500
There are three types of blood cells. The red blood cells, the white blood cells and the ___________ that heal wounds and stop the bleeding.
Platelets