Acelestial body orbits the sun. it consists of rock and ice. as it passes close to the sun, the body forms a long tail of dust. which body best matches this description?
asteroid
comet
dwarf planet
planet

That'd be a comet, which is composed of ice and dust. I hope this helps!

8.7 degrees celsius and 15.6 degrees fahrenheit

Ch4 and ph3 are both covalent since they are composed both of non-metals.    ch4 is non- polar because of  london forces and has a geometry of tetrahedral  ph3 , on the other hand, is umbrella shaped polar and has dipole-dipole intermolecular force (imf) . since ph3 is polar, it has a stronger imf