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CrispFacts / Subject index

Science

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

Entries: 04
View: Measurement

Science
Density and Buoyancy: Why a Heavy Object Can Float
Floating depends on the mass of displaced fluid and the whole object, not simply whether its material feels heavy. Work through density, volume, and force with bounded examples.
Jun 4, 20269 min
Science
Speed, Velocity, and Acceleration: What Changes When Direction Changes
A constant speed can still involve acceleration. Use round trips, signed directions, and simple graphs to separate distance, displacement, and changes in velocity.
May 28, 20268 min
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
Sound Frequency, Period, and Pitch Describe Different Parts of a Wave
Hertz counts cycles, period measures their duration, and pitch describes perception. Read a sound graph without confusing frequency, loudness, and travel speed.
Jan 20, 20266 min