A methane molecule sits in the middle of the screen. Use the slider on the left side of the screen to shoot some infrared photons at the molecule. 1. Do all the photons pass through the molecule?
2. When a photon gets absorbed, what happens next?
3. __the molecule in the middle shakes and a new one is emitted .
4. When a new photon is emitted, is it always sent in the same direction?
5. Which gases absorb photons?
6. Which three gases contribute to the greenhouse effect in our atmosphere?
7. Which two gases do not contribute to the greenhouse effect?

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.

explanation: no but i do not usually comment