Mini-Quiz: Mpemba Effect: When Hot Water Freezes before Cold

1. How did Mpemba make this discovery?

   He was observant and noticed something unusual when making ice creamThat is correct. You look like a Champion in science. He was making ice cream and noticed it melted before he ate itSorry, not correct. Try another button. His teachers suggested he make some ice cream to prove the effectGood try, but not right. Select another answer.

2. Why must you use the same type of container for all experiments?

   Because it is much more convenientSorry, not correct. Try another button. You must use an ice cream container, to duplicate the resultsOops! Wrong answer. Re-read the question and try again. The size, shape and material affect the rate of freezingCorrect. You sure are smarter.

3. Is there only one way to verify this effect?

   Yes, you must use a wooden bucket to make your ice creamGood try, but not right. Select another answer. No, there are many variations you can tryThat is correct. You look like a Champion in science. It depends if you are in Africa or some other locationSorry, not correct. Try another button.

Pick an answer to see instant feedback. Re-read the lesson if you miss one.