what do you predict will happen in two weeks time to seedling (b)? the leaves will turn 180 degrees, and the stem will curl 90 degrees downwards. the stem will turn 90 degrees downward, and the root will curl 90 degrees upwards. it will die because it is lying on its side. the root will turn 90 degrees downward, and the stem will curl 90 degrees upwards.

The root will turn 90 degrees downward, and the stem will curl 90 degrees upwards.

Explanation:

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.

level 4 to level 2 : ))