What is an analog thermometer?

What is an anion? Is an anion negative? Learn the anion definition and how ions are part of an ionic bond. See examples of anions and properties of anions.

Learn the definition of a hygrometer. Understand what a hygrometer is, what it measures, how it works, its types, and its use as a humidity measurement tool.

Learn about temperature, its cause, and how to measure it. Investigate how the kinetic energy of molecules can generate heat and how a thermometer can read temperature. Finally, discover why temperature is important.

Understand the concept of blackbody objects and how they emit blackbody radiation. Learn Planck's equation for the blackbody radiation and the associated terms.

See the heat capacity definition and symbol. View examples to learn how to use the heat capacity formula to calculate the heat capacity of a substance.

What is thermal expansion? Learn the phenomenon of thermal expansion due to absorption of heat. Understand the equation of thermal expansion with examples.

Thermometers are instruments that can be used to measure temperature. Learn how to read a thermometer by discovering the scale, increments, and temperature readings of thermometers.

Learn all about fish! Discover the physical characteristics of fish, which fish live in freshwater or saltwater, and what fish eat. Finally, learn how fish reproduce.

Explore wind vanes. Learn the definition of a wind vane and understand its important uses. Discover what a wind vane measures and see weather vane facts.

Learn what core temperature is and understand the difference between skin temperature and body temperature. Read how to raise your core body temperature.

Explore temperature conversion. Learn how to convert Celsius to Fahrenheit and Fahrenheit to Celsius. Look at their formulas and examples of the conversion.

The third law of thermodynamics states the entropy of a perfect crystal at absolute zero is exactly equal to zero. Explore the definition of absolute entropy and how the third law of thermodynamics applies to absolute entropy in this lesson.

The atomic radius is simply half the diameter of the atom itself, but is not as intuitive as it may seem, as an increase of atomic mass does not always correspond with a larger radius or size. Explore these nuances by learning to calculate the formula behind atomic radii.

Understand the idea of magnetic permeability within the context of electromagnetism. Learn the value and SI units of the magnetic permeability of free space.

What is heat? Learn about the effects of heat and the properties of heat on objects. Understand the modes by which heat transfer takes place by using examples.

Understand the meaning of heat energy. Discover the types of heat energy and see examples of it.