(first answer gets )

(answer the 2 questions in the picture)

The first one is magnetic attraction, because the iron will be attracted to the magnet, but the sulfur will stay behind.

The second one is evaporation. Salt has to have higher heat temp. in order for it to dissolve, so the water will leave behind the salt.

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation:

c (diamond),

sio2 (quartz)