Natural or Man-Made
Is a bird’s nest natural or man-made?
Natural
What is a structure?
Something that has parts put together for a purpose.
What does “flexible” mean?
Can bend without breaking.
What material are windows made of?|
Glass
|Is wood natural or man-made?
Natural
Is a bridge natural or man-made?
Man-Made
Name one purpose of a structure.
To support, protect, contain, or hold something.
What does “rigid” mean?
Hard and not easily bent.
What material is used to make most clothes?
Fabric
Is plastic natural or man-made?
Man-Made
Is a spider web a structure?|
Yes
True or false: A structure must always be man-made.
False
What does “buoyant” mean?
Able to float in water.
What material is used to make paper?
Wood (from trees)
Which material group does paper belong to?
Natural (made from wood)
What kind of structure is a beaver dam?
Natural structure made by an animal.
What part of a structure gives it strength or stability?
Its frame or base
Which material is “absorbent”— sponge or glass?
Sponge
Why is metal used for tall buildings?
It is strong and durable.
Group these by “rigid” or “flexible”: metal, fabric, paper.
Rigid: metal, paper Flexible: fabric.