Big Idea 06, Week 04: Why Can't You Light a Match More Than Once? (Daily Science)
This daily science unit for grade 5 presents information & five activities about how combustion is a chemical reaction that creates heat and light, sometimes only once. (Week 4 of 5; Big Idea 6: "When a new substance is made through a chemical reaction, it has properties that are different from the original substances.") The unit includes an answer key.