3-ій день СТЕМ табору з англійської мови присвячений математиці. Учні розрахують скільки енергії використовує їх кабінет, школа, як можно скоротити витрати та познайомляться з сонячною енергією, побудувавши сонячну духову піч.
5-days school STEM Camp
for children 7-8th form
3rd day: Math day: How much energy does school need? Solar power.
Мета: викликати в учнів бажання дізнаватися нове, виховувати дбайливе ставлення до навколишнього середовища, природних ресурсів, ознайомити з альтернативними видами енергії, розвивати логічне мислення, вміння працювати у команді, швидкість реакцій.
Обладнання: приладдя для експерименту
Each day we are surrounded with and use many fantastic technologies. While not always obvious, these technologies require energy to operate. This energy use can add up in terms of monthly power bills as well as the natural resources required to produce that power off site. Numerous energy efficient tools exist today to help us conserve resources and reduce our monthly payments. This experiments helps you identify what is using energy in our classroom and encourages you to brainstorm strategies for your school to reduce its consumption and monthly fees.
What to do:
Author: Alexa Bach McElrone https://www.education.com/science-fair/article/mapping-energy-use/?source=related_materials&order=6
“How to Make a Solar Oven”
There are lots of great reasons to learn how to make a solar oven! Maybe you’re going camping. Maybe you’re interested in learning about different ways to concentrate the sun’s energy. Maybe you’re interested in methods of cooking that don’t add greenhouse gasses to the atmosphere. Maybe you’re just hungry! In any case, as long as you’re patient and willing to move your oven where the sun is, you’ll be rewarded with some hot, yummy food.
Several scientific phenomena are involved in making your oven the best heater it can be. Heat is the form of energy (sometimes called thermal energy) that is transferred by a difference in temperature. You want to transfer the sun’s heat to your solar over. Reflectionis the throwing back of light, heat or sound by a body or surface, like a mirror. The shiny foil you’ll use in your oven will reflect the sun’s light and heat inside your oven. During absorbtion, energy is taken into a material rather than reflected. You will line the inside of your oven with black paper so it can absorb the light and heat being reflected into it. Another energy process you should be familiar with for this project is convection, which is the transfer of heat by the movement of a gas or liquid. You’ll use plastic wrap to make your oven airtight so the air warmed by the sun doesn’t leave your oven through convection. One final energy term important to this project is insulation. Insulating materials prevent heat leaving your oven through radiation. That’s why you are going to line the inside of your oven with a cheap and effective insulator—newspaper!
On a sunny, warm day, your oven could reach about 200 degrees F. You will notice that food takes longer to cook in a solar oven than a regular one.
Let’s recap: You covered the flap with foil so that the foil would reflect sunlight into the oven. The black paper on the bottom of your oven absorbed the sun’s energy (white paper would have reflected a lot of that energy). You made your oven airtight so that the warm air inside your oven would not leave the pizza box via convection. You put the newspaper inside your oven to insulate it and prevent heat loss through radiation. It is best to use your oven between 11 AM - 2 PM because that is when the sun’s rays are strongest. If you are making a s’more, it is good idea to have the chocolate on top because its dark color will absorb heat better than the lighter graham crackers. Food takes longer to cook in a solar oven because solar ovens don’t get as hot as conventional ovens. That’s okay for many dishes, and using an educational oven like the one you made yourself adds an extra special taste. (Джерело: https://www.education.com/science-fair/article/design-solar-cooker/?source=related_materials&order=3 )