Changes Around Us

5. The final substances that are formed at the end of a chemical reaction.
6. The slow process where a liquid changes into vapor below its boiling point.
8. A change that happens almost instantly, like the bursting of a balloon.
9. Most substances expand or change their state when they undergo ________.
11. The starting substances that participate in a chemical reaction.
13. A change where new substances with different properties are formed, like burning wood.
14. A change that can be undone to get the original substance back, like melting ice.
15. Changes that do not occur at fixed intervals, such as an earthquake or a landslide.

1. Solid, liquid, and gas are the three _______ of matter that can change under different temperatures.
2. A change in which no new substance is formed and the chemical nature remains the same.
3. The rapid change of a liquid into vapor at its specific boiling point.
4. A change that cannot be undone; the original substance cannot be recovered.
7. Changes that repeat themselves at regular intervals of time, such as the phases of the moon.
10. A chemical _______ is a process where substances interact to form entirely new products.
12. A change that takes a long time to occur, like the growth of a plant or the rusting of iron.