Q: A voltaic cell uses what type of reaction to generate an electric current Choices: - spontaneous catalyst - chemical reaction - instantaneous redox - spontaneous redox A:
spontaneous redox

Q: What two elements primarily make up the sun? Choices: - oxygen and hydrogen - nitrogen and argon - calcium and helium - hydrogen and helium A:
hydrogen and helium

Q: What type of thin lava forms shapes and tubes as it flows? Choices: - spicule - xeric - xerophyte - pahoehoe A:
pahoehoe

Q: What type of roads and parking lots prevent rainwater from soaking into the ground? Choices: - gravel - shaded - dirt - paved A:
paved