Ques:Q: A rusty bike has been left outside in damp weather too many times, so the iron in the metal parts have? Choices: - melted - eroded - decayed - rusted A:

Ans:rusted
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Ques:Q: Phosphorus exists as several allotropes, the most common being red, black, and what? Choices: - purple phosphorus - yellow phosphorous - green phosphorus - white phosphorus A:

Ans:white phosphorus
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Ques:Q: A period is a horizontal row of the what? Choices: - cycles table - phases table - species table - periodic table A:

Ans:periodic table
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Ques:Q: Physical features on the earth's surface are known as ______ Choices: - atmospheres - diversity - biospheres - landforms A:

Ans:
landforms
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