Q: Q: What mineral is made of one silicon atom and two oxygen atoms? Choices: - glass - pumice - cobalt - quartz A:
A: quartz

Q: Q: By breaking down wastes and remains of dead organisms, decomposers perform what function in an ecosystem? Choices: - reproduction - symbiosis - collecting - recycling A:
A: recycling

Q: Q: What is the change in a species over time? Choices: - variation - phenomenon - transformation - evolution A:
A: evolution

Q: Q: Alveolar ducts and broncioles are developing parts of what organ system? Choices: - nervous - immune - digestive - respiratory A:
A: respiratory