(Question)
Q: Radioactive decay can give off energy and what else? Read this paragraph and choose the correct option from the provided answers: Radioactive elements and isotopes have unstable nuclei. To become more stable, the nuclei undergo radioactive decay. In radioactive decay, the nuclei give off, or emit, radiation in the form of energy and often particles as well. There are several types of radioactive decay, including alpha, beta, and gamma decay. Energy is emitted in all three types of decay, but only alpha and beta decay also emit particles. Choices: - light - ions - atoms - particles A:
(Answer)
particles

(Question)
Q: Sudden changes in geologic and climatic conditions can spur what process? Read this paragraph and choose the correct option from the provided answers: When geologic and climatic conditions are changing, evolution may occur more quickly. Thus, long periods of little change may be interrupted by bursts of rapid change. This model of the timing of evolution is called punctuated equilibrium . It is better supported by the fossil record than is gradualism. This model suggests that niches left open by sudden geologic and climatic changes may be rapidly filled by bursts of evolution. Choices: - generation - cloning - symbiosis - evolution A:
(Answer)
evolution

(Question)
Q: What are usually planted in rows with bare soil in between the rows? Read this paragraph and choose the correct option from the provided answers: The problem doesn't stop with plowing. Crops are usually planted in rows with bare soil in between the rows. In places where crops grow only during part of the year, the land may be bare for a few months. Choices: - corn - beans - trees - crops A:
(Answer)
crops