A Foaming Experience
Students will be able to describe and discuss their experiments and compare and contrast their activities to the activity in the book.
Introduction (20 minutes)
- Show your students the goggles, explaining that they protect eyes.
- Explain that a scientist is someone who studies something, makes guesses about it, and then does an experiment to see if her guess is correct.
- Tell your students that an experiment is a project where people can try something to see what happens.
- Read If You Take a Mouse to School.
- When you get to the page where the mouse is doing the experiment, point out the protective goggles.
- Ask the students why they think he is wearing the protective goggles. Explain that the mouse’s experiment is very messy, and he needs to protect his eyes.
- Read the book Scientists. Explain that there are many different kinds of scientists who study very different topics.
Explicit Instruction/Teacher Modeling (20 minutes)
- Tell the students that today, they will pretend to be a scientist and perform an experiment just like the mouse in the book.
- Hand out protective goggles for each student, and have them put them on.
- Ask your students to identify the two colors that mix together to become purple.
- Tell your students that you will try an experiment in which you mix colors in vinegar.
- Start the experiment by mixing the red and blue food coloring into some vinegar.
- Mix other colors together after asking the students for their thoughts on what colors will make green and orange.
- Hand out a tray to each student for their experiments.
- Put some of the colored vinegar in a large clear cup, and give one to each student.
- Hand out a small clear cup with baking soda in it and a spoon to each student.
- Tell the students that when they make a guess, it is called a prediction.
- Ask your students to make a prediction about what will happen when they put some baking soda into the colored mixtures.
Guided Practice/Interactive Modeling (15 minutes)
- Have the students use the spoon to sprinkle a small amount of baking soda into the purple vinegar.
- Talk about the sound, smell, color, and look of the experiment.
- Ask the students to identify similarities and differences between the mouse's experiment and their experiments.
Independent Working Time (15 minutes)
- Hand out paper and crayons.
- Ask the students to draw a picture of their experiments.
- Instruct your students to tell you about their pictures.
- Write key comments on their pictures.
- Enrichment: Have your students come up with an additional experiment with the existing materials. With your permission and guidance, instruct them to carry out the experiment.
- Support: Direct your students to come up with ideas of what scientists might study. Have them identify scientists in real life.
Assessment (5 minutes)
- Observe the students as they perform their experiments and as they draw their pictures.
- When they tell you about their pictures, make sure they use key words.
Review and Closing (5 minutes)
- Ask the students to come up with other experiments.
- Based on their suggestions, come up with an idea that you can try on another day and become scientists again!