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

constant velocity

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

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

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

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

motion

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

uniformly moving frames of reference

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

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

The stretching of time is called ………

Time dilation occurs slightly for …………… speeds, but significantly for speeds approaching

the speed of light

The amount of energy required to propel spaceships to relativistic speeds are billions of times

the energy used to put the space shuttles into ……….

When an object moves at a very high speed relative to an …….., its measured length in the

direction of motion is contracted

The observable shortening of objects moving at speeds approaching the speed of light is …

As relative speed increases, contraction in the direction of motion ……….