Great for Christmas unit.
This lesson builds on the background knowledge of making cookies. Students will need to know that regular cookies usually have ingredients such as butter, sugar, baking powder and other ingredients that keep cookies soft and edible.
This experiment is based on the students not knowing that the "cookies" are going to be ornaments. Students can make conclusions about why the salt cookies are hard. Some choices are provided on the worksheet with pictures.
Data sheet goes through the scientific method. Problem, Hypothesis, Experiment, Data, Conclusion using pictures.
These “cookies” should not be eaten. They are non-toxic but due to the amount of salt are way too salty to eat.