The largest part of a water molecule is an atom of this element that has a negative charge
This 5-letter word is the opposite of attract
The vast majority of this second-lightest gas comes from natural gas fields in the U.S.
The tail of this body is formed when ice turns into gas as it gets closer to the sun
Sialia mexicana is the scientific name of the western bluebird: Sialia is the genus & mexicana tells you this
In a first-class type of this, the fulcrum is between the applied force and the load
It's compressed to run a pneumatic device like a jackhammer
Type of mechanics illustrated here
The red shift of galaxies & the change in the pitch of a train whistle are examples of this man's effect
In the 1800s scientists proposed a luminiferous ether to explain how this can travel in waves