HELP Which statement describes an effect of large asteroid and comet impacts? They may cause continents to move. They may cause small craters on Earth’s surface. They may cause changes limited to within the crater. They may kick up dust and pollute Earth’s atmosphere.

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.  

how important do you think an instrument is to the musician who plays it?