Chapter 11- Structures Science

Question 1

stability

Answer 1

ability of a structure to maintain its balance when forces are acted on it

Question 2

Centre of gravity

Answer 2

key characteristic of a structure that is a point where the mass is equally balanced in all directions.

Question 3

Beam

Answer 3

common structure that is designed to support a load.

Question 4

I -Beam

Answer 4

Lighter version of a beam that can still support a
Larger load

Question 5

Corrugation

Answer 5

Triangular ridges, grooves or folds

Question 6

Rebar

Answer 6

Reinforcing steel rods

Question 7

cantilever

Answer 7

Beam that is supported only at one

End

Question 8

Truss

Answer 8

beams arranged to form triangles

Question 9

Arch

Answer 9

curved structure where the force is

transferred downward on both sides

Question 10

Dome

Answer 10

top half of a sphere or egg shape where

the force is transferred downward in many places

Question 11

Structural Failure

Answer 11

when a structure is not able to

perform its task.

Question 12

Bad Design

Answer 12

incorrect material, not accounting for load

or important factors and stress

Question 13

Faulty Construction

Answer 13

construction errors, poor

installation, wrong materials used

Question 14

Extraordinary Loads

Answer 14

extreme weather conditions- wind,

snow, lightning and ice