Q: The negative logarithm of the hydroxide-ion concentration of a solution is called? Choices: - the hil - the hop - the piel - the poh A:
the poh

Q: Name the plant considered to be the ancestor of plants? Choices: - brown algae - ferns - grass - green algae A:
green algae

Q: What occurs when a cold air mass runs into a warm air mass? Choices: - an occluded front - a stationary front - a snow day - a cold front A:
a cold front

Q: Plants supply, ultimately, most of the food eaten by terrestrial animals, along with what gas? Choices: - hydrogen - nitrogen - carbon dioxide - oxygen A:
oxygen