The soft starch inside the popcorn becomes inflated and spills out, cooling immediately and forming into the odd shape we know and love. A kernel will swell times its original size! There are a lot of experiments you can try using popcorn. First, you need to figure out what you want to compare and what you can measure.
For example:. Make sure you replicate your experiment. Be smart: plan ahead and conduct your experiment over several nights. If we had a dollar for every time we have been asked this question, we would be very, very wealthy. We love ALL American processed popcorn! The good news is that you get to eat lots of popcorn along the way. You are now leaving the popcorn. All About Popcorn. Our Story. Our Recipes. To understand how popcorn pops, you have to first understand what constitutes a popcorn kernel.
Inside each kernel of popcorn is a tiny droplet of water and starch, which are surrounded by a tough outer shell known as the pericarp. When you apply heat to the popcorn kernels by heating them on the stovetop or in a microwave, the water turns into vapor.
The vapor creates pressure inside the shell and forces the hard shell to crack open. The starch breaks out of the shell and turns solid, which is the white, fluffy popcorn that we eat. The homemade popcorn activity is especially great because you get to eat a healthy snack afterward! After you make stovetop popcorn, you may never go back to the store-bought microwave popcorn again.
Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. Search Search. Newsletter Sign Up. Search form Search. Objectives Students will hypothesize about the result of five experiments. Keywords corn, popcorn, percent, hypothesis, inquiry, science, pressure, experiment, steam, temperature, conclusion Materials Needed popcorn kernels for popping pan with cover or popcorn popper traditional or or hot-air popper oil not needed if you use a hot-air popper stove not needed if you use a hot-air popper test tube optional foil optional candle optional matches optional tongs optional needle for teacher only Lesson Plan Popcorn pops because each kernel has a tiny bit of water inside it.
You can present to students a simple experiment to prove that moisture is inside popcorn kernels. Use a test tube for this experiment. Place one kernel of popcorn in the bottom of the tube. Cover the tube with aluminum foil and poke a few small holes in the foil. Use tongs to hold the test tube as you hold it over a lighted candle. The students should be able to see steam escape.
Where is that steam coming from? The moisture inside the kernel turns to steam. If you hold the popcorn over the candle for a few minutes, it should heat up enough to pop. The pressure builds up inside the kernel until it bursts. Note: In each case below, students count out popcorn kernels. Using kernels enables older students to quickly and easily convert the number of kernels that pop or don't pop into percents.
Trending Report Card Comments It's report card time and you face the prospect of writing constructive, insightful, and original comments on a couple dozen report cards or more.
Here are positive report card comments for you to use and adapt! Struggling Students? You've reached the end of another grading period, and what could be more daunting than the task of composing insightful, original, and unique comments about every child in your class?
The following positive statements will help you tailor your comments to specific children and highlight their strengths. You can also use our statements to indicate a need for improvement. Turn the words around a bit, and you will transform each into a goal for a child to work toward. Sam cooperates consistently with others becomes Sam needs to cooperate more consistently with others, and Sally uses vivid language in writing may instead read With practice, Sally will learn to use vivid language in her writing.
Make Jan seeks new challenges into a request for parental support by changing it to read Please encourage Jan to seek new challenges. Whether you are tweaking statements from this page or creating original ones, check out our Report Card Thesaurus [see bottom of the page] that contains a list of appropriate adjectives and adverbs.
There you will find the right words to keep your comments fresh and accurate. We have organized our report card comments by category. Read the entire list or click one of the category links below to jump to that list. Behavior The student: cooperates consistently with the teacher and other students.
Character The student: shows respect for teachers and peers. Group Work The student: offers constructive suggestions to peers to enhance their work. Interests and Talents The student: has a well-developed sense of humor. Participation The student: listens attentively to the responses of others. Social Skills The student: makes friends quickly in the classroom. Time Management The student: tackles classroom assignments, tasks, and group work in an organized manner.
Work Habits The student: is a conscientious, hard-working student. Student Certificates! Recognize positive attitudes and achievements with personalized student award certificates! Report Card Thesaurus Looking for some great adverbs and adjectives to bring to life the comments that you put on report cards?
Go beyond the stale and repetitive With this list, your notes will always be creative and unique. Adjectives attentive, capable, careful, cheerful, confident, cooperative, courteous, creative, dynamic, eager, energetic, generous, hard-working, helpful, honest, imaginative, independent, industrious, motivated, organized, outgoing, pleasant, polite, resourceful, sincere, unique Adverbs always, commonly, consistently, daily, frequently, monthly, never, occasionally, often, rarely, regularly, typically, usually, weekly.
Objectives Students will learn about changes that occurred in the New World and Old World as a result of early exploration. Older students only.
Besides strange people and animals, they were exposed to many foods that were unknown in the Old World. In this lesson, you might post an outline map of the continents on a bulletin board. On the bulletin board, draw an arrow from the New World the Americas to the Old World Europe, Asia, Africa and post around it drawings or images from magazines or clip art of products discovered in the New World and taken back to the Old World.
0コメント