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A science lesson for elementary school students on the topic of cooking, specifically focusing on bread and butter. The lesson includes objectives, background information, materials, and instructions for making bread and observing the role of yeast, as well as making butter. Students will learn about states of matter and state changes during the cooking process. The document also includes safety guidelines and suggestions for further cooking activities.
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School Year: 2010/2011; 2012/ Developed for: McBride Elementary School, Vancouver School District Sir Wilfrid Laurier Elementary School, Vancouver School District Developed by: Ingrid Sulston (scientist); Christy Wong and Kecia Boecking (McBride teachers); Patricia Ellis and Barbara Duncan (Laurier teachers) Grade level: Presented to grades K-3; appropriate for grades K – 7 with age appropriate modifications Duration of lesson: 1 hour and 20 minutes Notes: If the oven is not in the classroom where this lesson takes place, a second adult is needed to leave the class and check on the baking process. Objectives
Materials
students
about 15cm square
measuring spoon per group
with measuring cup for an adult
measuring spoon for the group
breads on their foil
measuring spoon for the group
each jar 1/3 full
the start of the lesson
into
measuring spoon for the group
tube, for each student
measuring cup for the group
each group of students
with measuring spoon for an adult
with a measuring spoon per group
Introductory Discussion Ask students if any of them have done any cooking at home. Discuss what they have made and touch on the science involved. Tell students that we will make bread and butter today, and find out about some of the science in cooking. Tell the students that while they are making their bread and butter they will be looking for the different states of matter. Explain, or review as necessary, the states of matter with the students, showing examples with the starting ingredients. As a class, devise a hand signal that the students can make when they discover a state of matter (e.g. two fists together above their head symbolizing molecules next to each other). During the lesson, when a student makes this symbol, the class will pause to hear what state of matter has been found, and to find it themselves. Brief description of science activities:
from the yeast. The yeast eats the sugar and changes it into a gas [and ethanol]. (With older students, this can be demonstrated with molecule models - a glucose molecule can be split apart into two carbon dioxide and two ethanol molecules).