Science Curriculum Corner: “Everything’s Coming Up Lemons!” Here are several links to some wonderful science experiments you may want to incorporate into your classroom. Through these experiments the students will 1. Demonstrate cooperative learning skills. 2. Follow step by step directions. 3. Make predictions. 4. Collect data. 5. Record results. The students will also learn various scientific concepts through these experiments. They include the following: 1. Carbon dioxide and its effects 2. Acids and bases 3. Base pH levels 4. How electricity can be generated using acids 5. Reaction between metals and acid (lemon battery) Here are some “Refreshingly Cool” Science Experiments we have found: 1. Make “Invisible Ink” using lemon juice. Grades K-5 http://www.ehow.com/how_7768032_make-ink-milk-lemon-juice.html -Students create secret messages to send to one another using lemon juice. By using a heat source, the message is revealed. -Try the cabbage water spray at the end of the experiment to make the message reappear. Red Cabbage is an indicator for acids. 2. Blow up a balloon using lemon juice. Grades K-5 - Lemon Balloon • The juice from a lemon can be used to blow up a balloon. This is a fun and simple science project for kids of all ages. Water, lemon juice and baking soda are poured into a soda bottle. A balloon is quickly placed over the opening of the soda bottle. The balloon will expand as the ingredients inside bubble and form carbon dioxide. Teachers can use this project to teach about chemical reactions and carbon dioxide gas. 3. Cleaning a penny using lemon juice. Grades K-2 http://www.ehow.com/how_4603485_clean-pennies-lemon-juice.html • Set this up on a tray for a ready-made activity in the classroom. • Experiment with other cleaners on the pennies, such as white vinegar and water. Which one works the best? • Hypothesize about other items around the classroom or house that could be cleaned with lemon juice. Try it and see if it works! 4. “Lemon Fizz”-A simple and fun experiment with a great WOW factor geared toward grades K-2 (although grades 3-5 would have fun with this one too!) **Use clear cups for this experiment. This experiment is found at http://chemistry.about.com/od/bubbles/a/lemonfizz.htm -Baking soda and the citric acid in lemon juice react to form carbon dioxide gas which makes bubbles form. The bubbles are “trapped” by the dishwashing soap causing fizzing bubbles. -Use the mixture to create bubble prints or wash dishes with your bubble solution. 5. A chemical reaction using milk and lemon juice. Grades K-2 **There is a science prediction/observation worksheet you can download for this experiment. It can be found at http://www.lindaloos.com/11251696379 Summary: Create a science experiment using milk and a lemon, and introduce words such as sour, curdle, prediction, and sour. Description: What happens when you mix a little bit of lemon with a glass of milk? This simple science experiment can be done during a unit about farms, or when talking about nutrition, or really an time that you wish to introduce some science into your day! Here is what you will need: • Whole milk • Clear cups • Chocolate powder • Strawberry powder mix • Fresh lemon or pure lemon juice • Spoons • Prediction chart (please see attachment) You can talk to the children about milk and some of its properties - color, smell, flavor, temperature, liquid state. If you wish, you can try to add chocolate and/or strawberry powder to the milk, predicting what will happen when the milk and powders are mixed. Have the children smell and taste the differences. Introduce the word SWEET if the children to not do so on their own. Most children are familiar with mixing these powders in milk. This can be done in a large group setting. (If time permits, each child can have their own cups and spoons for an up close and personal encounter with science)! Then ask them to predict what they think will happen if you mix lemon with milk. Once you add the lemon, stir it into the milk. Have the children observe how this makes the milk change. It now looks and smells different. You can say that you will not want to taste this milk. It has become SOUR and CURDLED! You have now invited the children to observe predict, record, and communicate ideas with one another! Science can be so much fun! 6. “Lemon Power”-Students will “feel” electric current. This is a precursor to the famous ‘lemon battery’ experiment that follows. Grades 3-5 This experiment can be found at www.energyquest.ca.gov/projects/lemon.html **The lemon battery is called a voltaic battery, which changes chemical energy into electrical energy. 7. The Famous “Lemon Battery” Experiment-very cool! Grades 3-5 **This experiment involves making a lemon battery to actually light up a small LED light. It involves several steps, but the learning opportunity is tremendous. The website contains great graphics and thorough explanation to showcase the process. You will need a volt meter for this experiment. This experiment is found at www.hilaroad.com/camp/projects/lemon/lemon_battery.html 8. You-tube Video of Lemon Battery Experiment- Great video demonstrating the above experiment by the same website (hilaroad). Easy to follow and gives a super visual representation. The website link to the video is www.youtube.com/watch?v=AY9qcDCFeVI “Weather or Not!” **Weather can significantly affect the daily success of lemonade stand sales. If you are beginning a real lemonade stand or setting up a virtual lemonade stand as a classroom activity, here are a few links to some weather charts for students to use when predicting and recording the weather. For younger children, (grades K-1), a simple graph for tracking the weather is found at www.education.com/worksheets/weather-seasons/ Page 2 “Graph the Weather” For grades 1-5, this website is has some helpful materials: www.theteachersguide.com and click Weather Scroll down to Weather forecasting lesson plans, activities, and interactive resources. 1. Click on Student weather forecast (PDF file) **This is a prediction/actual weather worksheet for recording weather. Younger students can use stickers and/or symbols (sun, clouds, umbrella, etc.) for recording weather. 2. Click on Daily temperature graph (PDF file) **This is a bar graph that students can use to record temp. for a given period of time.
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