Heat is a measure of how much energy it takes
to raise the temperature of a substance.

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.

with this one i know the answer in craters one reason i looked it up and i learned about it there is my evidence

air

in a tire you fill a tire with air

then a couple days later you check the air pressure in the tire

hope this mark me brainliest