1st term C.A.T 21st Century Technology

3D means

• three dimensional

• three decimals

• three diagonals

The dimensions of a 3D shape are

• length, breath, circumference

• length, depth and height

• length, width and height

An example of a 3D shape is

• phone

• circle

• paper

3D printers creates objects by building them up

• step by step

• layer by layer

• grid by grid

The material commonly used for printing 3D objects is

• bricks

• glass

• plastic

The first process in printing 3D objects is to

• choose a model

• send the object to a printer

• convert the file to what a printer understands

Which of these is not an information sent through fibre optics

• sound

• computer codes

• fibres

In a fibre optic system, a machine called a _______ turns information into light

• receiver

• transmitter

• core

The inner part of each fibre is called ______

• The mantle

• The receiver

• The core

At the end of each fiber, a machine called a _______ accepts the light sent by the transmitter

• receiver

• computer codes

• cladding