Between points 1 and 2, water is a
a. gas
b. solid
c. plasma
d. liquid

How does the principle of electromagnetism explain the interaction between earth’s magnetic field and the solar wind?

Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.

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