Einstein reasoned that space and time are TWO parts of one whole called …………

• space-time

• universe-time

• lunch-time

Einstein’s special theory of relativity describes how time is affected by ……….. in space at

constant velocity

• velocity

• motion

• speed

Einstein’s special theory of relativity also explains how ……….. and energy are related

• material

• speed

• mass

From the viewpoint of ………. relativity, you travel through a combination of space and time

• normal

• special

• time

The special relativity theory of Einstein, rests on TWO fundamental assumptions, or ………..

• postulates

• reasons

• notions

Einstein’s first postulate of special relativity assumes our ……… to detect a state of uniform

motion

• ability

• eye

• inability

The first postulate of special relativity states that all the laws of …….. are the same in all

uniformly moving frames of reference

• Earth

• nature

• sunlight

Einstein’s second postulate of special relativity assumes that the speed of ……. Is constant

• sound

• energy

• light

The second postulate of special relativity states that ……. of light in empty space will always have

the same value regardless of the motion of the source or the motion

• speed

• motion

• weight

The stretching of time is called ………

• time-speed

• time contraction

• time dilation