Q Question 1 1 / 1 pts What is the difference between a physical and a chemical change? Question 2 5 / 5 pts Identify each of the following as a COMPOUND, an ELEMENT, a SOLUTION, or a HETEROGENEOUS MIXTURE. Question 3 3 / 3 pts The following gases will be tested in this experiment for their characteristic properties: water vapor, sulfur dioxide, oxygen and hydrogen. Match these gases with their characteristic properties: (a) When a wooden splint is lighted then its flame is blown out, this gas makes the glowing red splint burst into flames again ["", "", "", ""] . (b) This gas has a distinctive, sharp and choking odor ["", "", "", ""] . It is a major cause of the environmental phenomenon called “acid rain”. (c) This gas explodes when ignited with a lighted wooden splint hydrogen .