Today's Rocket Words: Your 5 words and meanings to learn
atmosphere
the gases surrounding the Earth or another planet
oxygen
a colourless, odourless reactive gas with the atomic number 8 which is used in respiration
composition
the number or amount of components which make up a larger whole
gas
a state of matter; gases will expand freely to fill a container and have no fixed shape or volume
nitrogen
a chemical element with the atomic number 7; it is a colourless, odourless, unreactive gas that forms about 78% of the Earth's atmosphere