Science 7 Year End Review - Unit D

natural frame structure

natural shell structure

artificial frame structure

artificial shell structure

All structures should consider their functions when being designed.

All structures should be aesthetically pleasing.

Environmental impact describes how a structure affects taxes in the neighbourhood where it is located.

Operating within a budget does not generally impact choice of building materials.

Greater amounts of people living in the world.

Different levels of wants and needs.

Improved materials and engineering abilities.

None of the above.

Snail shells

Waves

Duck Feet

Tree bark

Fixed joints everywhere.

Moveable joint everywhere.

Fixed joints on the lid and moveable joints for the sides.

Moveable joints for the lid and fixed joints for the sides.

The frame of the car.

Mrs. Hill's teaching bag.

Mrs. Hill

The road the car drives on.

10 N

5 N

20N

15 N

Welding

Adhesive

Interlocking pieces

Natural joints

Tension

Compression

Shear

None of the above.

Structural failure always leads to structural stress.

Structural failure sometimes leads to structural stress.

Structural stress always leads to structural failure.

Structural stress sometimes leads to structural failure.

In the symmetrical structure, the centre of gravity is off to one side.

In the asymmetrical structure, the centre of gravity is in the centre line.

In the symmetrical structure, the centre of gravity is at the very bottom.

In ANY asymmetrical structure, the centre of gravity is ALWAYS off to one side.

None of the above.

Without flexibility, joints would not be able to move.

Ligaments are not flexible.

They prevent bones from breaking.

They protect tendons from stress.

Corrugation

Lamination

Design change

Altering of joint arrangement.

Build houses on hillsides.

Build houses near water.

Farm or develop in the area.

Create a foundation with cement.