Types of structures
What do we call a structure that is built by people, like a bridge or building?
Human-made structure
What force pulls objects toward the Earth?
Gravity
A structure that can support weight without breaking is described as what?
Strong
Wood, metal and plastic are examples of what?
What structure allows people or cars to cross over water or roads?
A bridge
What do we call a structure that is not made by humans, like a tree or mountain?
Natural structure
A push or a pull on an object is called what?
A force
A structure that does not tip over easily is described as what?
Stable
What material is often used in buildings because it is very strong under compression?
Concrete
What structure protects people from weather and provides shelter?
A building or a house
Is a flower considered a structure? If yes, what kind? If no, why?
Yes, it is a natural structure
What force happens when something is pulled tight, like a rope holding up a swing?
Tension
What shape is often used in structures because it is very strong?
What property describes how much weight a material can hold?
Strength
Why do many tall buildings have wide bases?
To increase stability
Is a pile of loose sand on the ground a structure?
No, because it is not built or organized to hold a shape
What is the dead load of a structure?
The weight of the structure itself
Widening the bottom of a structure helps improve what property?
Stability
Why might engineers choose steel instead of wood for a bridge?
Steel is stronger and more durable?
What happens when a structure cannot handle the forces acting on it?
It will collapse or fail
Which of these is a natural structure: a spider web, a chair, or a bridge?
Spider web
What force happens when one part of an object slides past another part, like cutting paper with scissors?
Shear
If a structure keeps tipping over, what is one change an engineer could make to fix it?
Make the base wider, lower the height, spread the weight evenly
Choosing the best material for a structure depends on purpose, cost and what other factor?
Safety
Engineers test structures to make sure they are strong, stable and what else?
Safe