Science

14 cards·by _jj_morin_

Why is the Leaning Tower of Pisa leaning?

Because the thrust line is outside the foundation

Which is more stable: A wide base and a low center of gravity, or a narrow base and a high center of gravity?

A wide base with a low center of gravity

Are mountains and coral reefs examples of natural solid structures?

Yes

A cupped hand represents a

Shell structure

Containing, sheltering, transporting, and lifting are all words to describe a structure's

Function

The spider web is a

Natural frame structure

A very steep roof in a mountainous area is designed to prevent

Snow build-up

What roof type is commonly seen on a farm?

A gambrel roof

One important criteria that is seldom written down, is that the structure

Is aesthetically pleasing

What is the middle highest point of the arch called?

Keystone

What kind of material is reinforced concrete?

Composite material

A type of adhesive that hardens when it cools is

Thermosetting glue

The force that resists another object when the surfaces of each other are in contact is called

Friction

One material, if made the thickness of a pencil, could stop a 747 jet. This material is known as

Spider silk