Q: One crystalline form of calcium carbonate is the mineral sold as what? Choices: - quartz - basalt - salt - calcite A:
calcite

(Question)
Q: What is the simplest type of carbon-based compounds? Choices: - Buckminsterfullerine - graphite - particles - hydrocarbons A:
(Answer)
hydrocarbons

Ques: Q: Atoms that have gained electrons and become negatively charged are called what? Choices: - negative atoms - cations - anions - negative ions A:
Ans: negative ions

(Q).
Q: The last major ice age took place in which era? Choices: - miocene - pliocene - cenozoic - pleistocene A:
(A).
pleistocene

Ques:Q: In some cases, the nervous system directly stimulates endocrine glands to release hormones, which is referred to as what? Choices: - brain stimuli - active stimuli - functional stimuli - neural stimuli A:

Ans:neural stimuli

Q: What do you call any device that makes work easier by changing a force? Choices: - technology - invention - battery - machine A:
machine