Question: Q: By 180 million years ago, pangaea began to do what? Choices: - combine - freeze - grow - break up A:
Answer: break up

Question: Q: Why is gingko biloba planted in public spaces? Choices: - for xeriscaping - self-pollinating - self-containing - resistant to pollution A:
Answer: resistant to pollution

Question: Q: What involves the emission of a particle and/or energy as one atom changes into another? Choices: - spontaneous mutation - atomic transformation - enthalpy - radioactive decay A:
Answer:
radioactive decay