alex 7 science unit 3 test

Question 1

structure

Answer 1

Things with a definite size and shape which serve a definite purpose or function.

Question 2

function

Answer 2

The main purpose of a structure or object

Question 3

force

Answer 3

A stress that causes an object to change shape or direction of movement

Question 4

stress

Answer 4

Push or pull

Question 5

load

Answer 5

The weight carried or supported by an object

Question 6

Weight

Answer 6

The amount of force that is exerted on an object by gravity

Question 7

mass

Answer 7

The amount of matter in an object

Question 8

Natural structures

Answer 8

Structures that are not made by man

Question 9

Manufactured structures

Answer 9

Structures that are built by people

Question 10

Mass structures

Answer 10

A natural or manufactured structure that is made up by the piling up of materials

Question 11

Frame structure

Answer 11

A type of structure in which a skeleton of materials supports the weight of the other parts

Question 12

shell structure

Answer 12

A type of structure that obtains its strength from a thin, carefully shaped outer layer of material and that requires no internal frame

Question 13

Mix and match structure

Answer 13

A type of structure that has a combination of structures

Question 14

designs

Answer 14

The way a structure looks or the way its parts were put together

Question 15

materials

Answer 15

Substances from which a structure is constructed

Question 16

frames

Answer 16

The skeleton or supporting materials of one kind of structure

Question 17

manufactured

Answer 17

Structures that are built by people or machinery

Question 18

specifications

Answer 18

The materials, dimensions, and other criteria that designers use to plan structures

Question 19

natural

Answer 19

Structures that occur in the environment and are not made by people

Question 20

strength

Answer 20

The property that describes a structures ability to support a load

Question 21

domes

Answer 21

Shell and frame structures, sometimes with a geodesic form

Question 22

aesthetics

Answer 22

How it looks

Question 23

Margin of Safety

Answer 23

Over the expectations -just to be safe

Question 24

properties

Answer 24

characteristics

Question 25

materials

Answer 25

Composite
Layered
Woven
knit

Question 26

joints

Answer 26

Mobile 
Rigid
Fasteners
Interlocking shapes
Ties
Adhesives
melting

Question 27

mobile

Answer 27

Able to move

Question 28

rigid

Answer 28

Can’t move

Question 29

External forces

Answer 29

Stress’s from the outside

Question 30

Internal forces

Answer 30

Stress’s from the inside

Question 31

deformation

Answer 31

A change to the shape or size of a structure

Question 32

External forces types

Answer 32

Dead load

Live load

Question 33

Dead load

Answer 33

Permanent force on the structure

Question 34

Live load

Answer 34

Changing force on a structure

Question 35

Internal forces types

Answer 35

tension
Compression
Shear
torsion

Question 36

tension

Answer 36

pulling

Question 37

compression

Answer 37

squeezing

Question 38

shear

Answer 38

tearing

Question 39

torsion

Answer 39

twisting

Question 40

lever

Answer 40

A deivice that can change the amount of force needed to move an object

Question 41

material fail types

Answer 41

Shear
Bend /buckle
torsion