Answer 2 questions Describe how scientists can use vibrations during earthquakes to figure out if the Earth is made up of liquid or solid deep inside?
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Describe how you can use earthquake vibrations to prove the inside of the Earth is made of separate layers?

Magnesium is the fourth most abundant mineral in the body and is essential to good health. magnesium is needed for more than 300 biochemical reactions in the body. it maintain normal muscle and nerve function, keep bones strong, keep one’s heart rhythm steady, and supports a healthy immune system. magnesium also regulate blood sugar levels, promotes normal blood pressure, and may play a role in energy metabolism and protein synthesis. doctors and scientists are trying to determine whether magnesium may play a role in preventing and managing disorders such as hypertension, cardiovascular disease, and diabetes. which is the main idea of this paragraph? a. the role of magnesium in human nutrition is being studied intensely. b. magnesium may be related to the body’s metabolism and other healthy functions. c. magnesium appears to contribute to hypertension, cardiovascular disease, and diabetes. d. magnesium and a healthy immune system are separate diseases.

By comparing part 1 and 2 of polar opposites what does it mean by polar opposites

Which word best describes the mood in this sentence? lucia was aglow as she bounced into the room with stories about her summer vacation.