細胞+化學=魔法！ – 我的第一個生物化學實驗
在這門一次性課程中，學生將透過進行一項視覺上引人入勝的實驗室實驗來了解酵素、化學和細胞，該實驗通常被稱為大象牙膏反應，並使用麵包酵母稍作修改。
包含什麼
1 現場會議
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課堂經歷
英語程度 - B1
美國 5 - 8 年級
Beginner - Intermediate 等級
During this lesson, learners will be introduced to the concept of chemical reactions, including how to identify them in their everyday lives. They will learn and understand the principal components of a chemical reaction: reagents, products, and catalysts. Theory will be complemented with a discussion about the materials to be used in this house-friendly lab experiment, and the role each of them plays in the chemical reaction. We will also discuss the concept of enzymes, the chemical catalysts used by living organisms. The specific enzyme and reaction used in this experiment, as well as its importance for living systems, will be explained in detail. Learners will be able to experience preparing the reaction at their own homes, and as the reaction occurs, the visual changes and their causes will be explained to them. Despite the fact that this experiment is completely child-safe and uses only common household items, before performing it, we will talk about good safety practices when performing chemical experiments. We will touch on topics related to potential risks of chemicals, how to mitigate those risks, what protective gear to use and why, and how to properly manage the waste. Depending on time constrains, an additional demonstration may be performed by the teacher, to showcase a similar reaction in a different kind of living tissue (beef liver).
學習目標
Students will get a basic understanding of the study of chemistry and where we can find it in the world.Students will gain first-hand experience on conducting a laboratory experiment.
其他詳情
父母的引導和規範
This will be a practical class, where learners will get the chance to perform their own chemical experiment from home. All of the materials used for the experiment are household items and do not pose any serious risk as long as they are handled properly. The student will be required to use a kettle, microwave, or any other means available to them to warm water. We will be using 3-6% hydrogen peroxide, which is a common antiseptic solution found in most standard first-aid kits. While this is a completely safe chemical to use at this low concentration, it is important that learners are able to adhere to basic safety guidelines, avoiding ingestion, contact with eyes, or prolonged contact with skin.
Depending on time and materials availability, the teacher may show an additional live chemical reaction involving an animal tissue (for example, cow liver). The learners will not be required to handle animal tissue themselves, but the sight of the fizzing reaction on the liver tissue may be upsetting to some students.
供應清單
Since this class will involve performing an experiment in real time, the use of a webcam will be required for the entire duration of the meeting, as I will need to supervise your progress and your safety. The ingredients for the elephant toothpaste experiment are: -Half a cup of hydrogen peroxide, concentration of 3 to 6% (this is the hydrogen peroxide commonly found in first-aid kits to disinfect wounds; please DO NOT buy any laboratory or industrial-grade hydrogen peroxide) -About a tablespoon of dish-washing soap -A small satchel of dry baker's yeast (or about two teaspoons) -A few tablespoons of water, which we'll warm up during the experiment, using a microwave or small kettle -A pinch of table sugar -A vial of your favorite food-colorant (optional) -A clean and dry plastic soda bottle (if you are able to find a pop top for the bottle, that will greatly improve the effect) -A wide baking dish or food tray to put the bottle in during the reaction, and keep the mess contained -Protective plastic or newspaper for the table you'll be working on (just in case) -A plastic cooking funnel to fill the bottle -A spoon to mix To promote good laboratory safety practices, each young scientist should come prepared with: 1. Safety goggles (these can be found with online retailers for as low as $15, or bought at any hardware or home improvement store; if the young scientist wears glasses, these will suffice to protect their eyes) 2. A pair of protective gloves (these can be kitchen gloves, latex, nitrile or any kind of rubber gloves; make sure the gloves fit the scientist's hands properly, so that they can safely handle the chemicals!) 3. A lab coat, cooking apron, or any piece of protective cloth that will prevent stains on the young scientist's dashing outfit (remember: hydrogen peroxide is a bleaching agent, so if we get it on our clothes, it might damage them!)
教學語言
英語 （等級： B1）
外部資源
學習者無需使用標準 Outschool 工具以外的任何應用程式或網站。
已加入 January, 2025
教師專業知識和證書
學士學位 在 生物化學 從 Jacobs University Bremen
I have more than five years of work experience as a laboratory analyst or junior researcher. As a junior researcher, I designed and ran a laboratory course on molecular biology aimed at undergraduate students and medical residents. Furthermore, I have worked as an online tutor for science topics (chemistry and biology related topics) in the Pear Deck Tutor platform. During the last two years in said platform, I've had the opportunity to guide middle school and high school students through science fair projects and at-home laboratory experiments.評論
一次性直播課程
US$18
每班單堂課
55 分鐘
有1 位學習者完成此課程
即時視訊會議
年齡: 10-13
2-6 每班學員人數
