Today's Rocket Words: Your 5 words and meanings to learn
kilojoule
the unit of energy. 1 kilojoule = 1000 joules
joule
the unit of work or energy in the International System of Units (SI); it is equal to the work done by a force of one newton acting through one metre
kilometre
a unit of distance equal to 1,000 metres (approximately 0.62 miles)
substitute
to use or swap the place of something
kinetic
relating to motion