Mpemba effect

High school (ages 12+)
Science & Technology

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/mpemba-effect

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the phenomenon type?Anomalous thermodynamic behavior in liquid cooling and freezing
2. What is the key proponents?Erasto Mpemba and Denis Osborne
3. Why does hot water sometimes freeze faster?Hot water can lose heat more quickly because it evaporates more, which removes heat and reduces the amount of water left. The evaporation and stronger heat transfer help it cool faster.
4. Who discovered the Mpemba effect?A Tanzanian student named Erasto Mpemba noticed it while making ice cream in the 1960s and then studied it with a scientist.

Thermodynamics: The branch of physics dealing with heat and its relation to other forms of energy and work.
Colloid: A stable dispersion of one substance in another, with particles too small to be seen but large enough to scatter light.
Evaporative Cooling: The cooling effect that occurs when a liquid turns into a gas, absorbing heat from its surroundings.
Convection Currents: The movement of heat through a fluid (liquid or gas) by the bulk movement of the fluid itself.