A structure is the set of elements in a body that are made to __________ the effects of the _________ that act on it.

• protect, structure.

• resist, forces.

• create, humans.

• support, elements.

Forces that act on a structure are called...

• Foundations

• Loads

• Beams

• Pillars

Permanent loads are those...

• made by humans.

• that don't move.

• that are constantly acting on a structure and don’t vary over time

• that vary over time, such as the force of the wind.

Variable loads are those...

• made by humans.

• that don't move.

• that are constantly acting on a structure and don’t vary over time

• that vary over time, such as the force of the wind.

Natural structures are those...

• that change over time.

• created by humans.

• that don't change over time.

• created by nature.

Our skeleton is a(n)...

• Basic structure

• Natural structure

• Artificial structure

Artificial structures are those...

• that change over time.

• created by humans.

• that don't change over time.

• created by nature.

The bridge in the picture is a(n) ...

• Natural structure.

• Basic structure.

• Artificial structure.

Which are natural structures? (More than one option is possible).

• Tree trunk.

• Bridge.

• Mollusc shell.

• Pyramid.

Which elements support the beams?

• Pillars

• Arches

• Foundations