what is the difference between polar and ionic? for instance in substances such as vinegar and water.

Match each object to its description: a. coma of a comet b. comet tail c. oort cloud haze surrounding a nucleus created by solar wind. hypothetical sphere around the solar system

Which traits do human embryos have that link them to a common ancestor with fish and reptiles? a. scales and tail b. gill slits and scales c. tail and gill slits d. hair and tail

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?