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Science

Clear distinctions between scientific terms, measurements, and evidence, with examples that show where each explanation applies.

Entries: 02
View: Chemistry

Science
pH and Alkalinity Are Different Measurements of Water
pH describes hydrogen-ion activity on a logarithmic scale. Alkalinity concerns acid-neutralizing capacity. Learn what the numbers do and do not establish.
May 4, 20266 min
Science
Physical or Chemical Change? The Evidence Is About Substance Identity
A new shape, bubbles, or a temperature change does not alone prove a chemical reaction. Distinguish observations from evidence that substances have changed.
Jan 8, 20266 min