Glossary

baking soda (BAYK-ing SOH-duh) —

a white powder used in baking to make dough rise

clay (KLAY) —

a kind of earth that can be shaped when wet

explode (ek-SPLODE) —

to blow apart with a loud bang and great force

fierce (FIHRSS) —

daring and dangerous or strong

gas (GASS) —

something that is not liquid or solid and does not have a definite shape

lava (LAH-vuh) —

the hot, liquid rock that pours out of a volcano when it erupts

melted (MEL-tud) —

changed from a solid to a liquid

vinegar (VIN-uh-gur) —

a sour liquid, often made from cider, that is used to flavor food

volcano (vol-KAY-noh) —

a mountain with openings through which lava, ash, and gas may erupt