Which of the Following Processes Is Considered a Chemical Change

question 94

Multiple Choice

Which of the following processes is considered a chemical change ?
I. Corrosion of aluminum metal
II. Digesting a candy bar.
III. Melting of ice.

• A) I only
• B) II only
• C) III only
• D) I and II
• E) All of these

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Definitions:

ECG

Electrocardiogram, a test that records the heart’s electrical activity and can be used to diagnose various heart conditions.

QRS Complex

A series of deflections in an electrocardiogram representing the electrical activity associated with the ventricular contraction of the heart.

P Wave

The waveform on an electrocardiogram (ECG) that represents atrial depolarization, preceding the contraction of the atria.

Vigorous Activity ECGs

Electrocardiograms recorded during intense physical activity to monitor the heart's electrical activity and detect potential abnormalities.