4. When the Northern Hemisphere is titled away from the sun, the amount 2 points of light/energy received from the sun in the Northern Hemisphere is... * O the same as in the Southern Hemisphere O the same as at the equator spread out over a larger area O concentrated in a smaller area​

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.

- decrease the number of plants and animals living in the water.

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.