Structures – Missing Word worksheet


Structures – Worksheet

A structure provides ………………….. A structure must be able to support its own weight and whatever ……………load is put on it.

Structures can be divided into two groups; frame structure sand shell structures.

  • FRAME STRUCTURES are made up of separate strips which are fixed together to make a framework. An example of a frame structure is called a ……………………
  • SHELL STRUCTURES have a single, continuous ……………….. which supports the weight of the thing inside. An example of a shell structure is a drinks……….

FORCES

When you sit on a chair, the force or ……………………….. you put on it is called …………………. force. Inside the chair are forces called ………………. internal forces which stop the chair collapsing. If the external forces are greater than the internal force, the chair will ……………… When you are sitting still, the force you apply is also still. This is called a …………….force. When you rock backwards and forwards you apply ……………….. or moving force to the chair.

Forces are not all the same. Forces can press, pull, twist or bend. If we take a material or material and try and squash it, we can say that it is in ………………….

If we take a material and try to pull it apart from either end we are putting it into ……………….

When you twist the top of a bottle or jar to open it you are using ……………………. This is  a turning or twisting ……………. When you use  a spanner to tighten or undo a nut, you are using torsion.

When one force is balanced by another they are said  to be in …………………….. A structure in which the forces are balanced stays in one position, neither falling down or moving.

TRIANGULATION

Structures are made up of individual parts called ………………… These are under tension or compression. ………………….. forces can occur where members are joined. A member under tension is called a ……………, a member under compression is called a ………………. Ties may be made of string or rope, but struts must be …………………

Triangles are very useful when building …………………. They can make it very strong and ……………… A basic four sided frame can lean if a ……….. is put on from one side. It needs to be………..

One way of making this structure more rigid would be to put in one or two more parts or ………… going from corner to corner. This way of making structures more …………………… is called …………………… It is often used when building bridges or cranes.

Use the words listed below to fill in the blanks – some words appear twice.

CAN, COLLAPSE, COMPRESSION, CRANE, DYNAMIC, EQUILIBRIUM, EXTERNAL, FORCE, INTERNAL, LOAD, LOAD, MEMBERS, MEMBERS, MOVING, PRESSURE, RIGID, RIGID, SHEAR, SKIN, STABILISED, STABLE STRUCTURES, STRUT, STATIC, SUPPORT, TENSION, TIE, TORSION, TRIANGULATION.

ANSWERS in order

support, load, crane, skin, can, pressure, external, internal, collapse, static, dynamic, compression, tension, torsion, force, equilibrium, moving, members, shear, tie, strut, rigid, structures, stable, load, stabilised, members, rigid, triangulation.

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