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Science - 2nd Grade
Standard 1 Objective 1
1 class periods of 60 minutes each
Students work together as a class to generate a science fair project. The students use the steps of the scientific method to ask a question, form a hypothesis, design a test, collect data, and draw conclusions. Their findings are presented to the class and placed on a science fair project board for the school science fair. The topic of this project is to find out whether sugar dissolves faster in warm or cold water.
Sugar crystals are solid. When sugar is added to water the weak bonds between the individual sugar molecules are broken and the sugar molecules are released into the water. When this occurs a sugar water solution forms.
Increasing the temperature of water, decreases the time it takes to dissolve the sugar in water. At a higher temperature, there are more spaces between the water molecules for the sugar to dissolve into so the solution forms more quickly. The molecules of water are also moving faster at a higher temperature and this causes the dissolution rate to increase as well.
Pre-lab Discussion: Ask the students which they think occurs faster: adding a hot chocolate packet to cold milk or adding the packet to hot milk. Discuss with them what happens when they add the hot chocolate powder. Define the word dissolve and describe what that looks like. Tell the students that today they are going to test whether sugar dissolves faster in hot or cold water. Discuss with the students what a science fair is and tell them that they will complete a science fair project today in the classroom.
I. Experiment: Complete the experiment first and then work on writing the assigned sections for the project board.
II. Science fair display board: Assign each group a different section of the class science fair display board. Each group can decide what to write and then help the students take turns writing the different words on a half sheet of paper. Students will write up their section and then place it in the appropriate area on the display board. If you take pictures of the students working on the project you can put them on the board as well.
|Left Panel||Center Panel||Right Panel|
|Why we did the project||Title||What we learned|
|What we think will happen||Tables, pictures|
|How we did our project||drawings||Name of teacher|
Rio Tinto Hands-on Science Curriculum Team