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When a formula unit of magnesium sulfide, MgS, is separated into magnesium and sulfur particles, the particles are called

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Question I was asked: Which system absorbs and carries food from the digestive system to the rest of the body?

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From Earth, the Sun appears brighter than any other star because the Sun is the

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Question generated: Which list contains only nonliving things?

Problem: Write a question you would see in a school textbook.

Answer: How does an ecosystem benefit when leaves fall from a tree and decompose on the soil?

Problem: Write a question you would see in a school textbook.

Answer:
Which of the following properties of a substance is conserved during thermal expansion?