This document provides instructions for an experiment called "Elephant Toothpaste" which produces a foamy reaction. The supplies needed are warm water, yeast, food coloring, hydrogen peroxide at 3% or 6% concentration, dish soap, and an empty plastic bottle. The instructions describe combining these ingredients in steps: adding food coloring and dish soap to hydrogen peroxide in the bottle, then adding a mixture of warm water and yeast. This causes a foamy reaction to occur due to the hydrogen peroxide decomposing and the yeast and soap catalyzing bubble production. The foam produced is greater using 6% hydrogen peroxide compared to 3%.
Do not miss our ⚗️“Chemistry experiments for Kids at Home ”The booklet contains few easy science experiments that can keep scientists’ kids entertained ❤️
Do not miss our ⚗️“Chemistry experiments for Kids at Home” The booklet contains few easy science experiments that can keep scientists’ kids entertained ❤️
Do not miss our ⚗️“Chemistry experiments for Kids at Home ”The booklet contains few easy science experiments that can keep scientists’ kids entertained ❤️
Do not miss our ⚗️“Chemistry experiments for Kids at Home” The booklet contains few easy science experiments that can keep scientists’ kids entertained ❤️
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The map views are useful for providing a geographical representation of data. They allow users to visualize and analyze the data in a more intuitive manner.
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
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Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
5. WARNING
This experiment uses chemicals that can irritate
skin and damage clothes, so make sure to use lab
apron, and nitrile gloves. Avoid touching or getting
the chemicals on skin or clothing. And don't get too
close, as heat and steam can be dangerous.
6. Step 1 – Combine two
tablespoons of warm water with
one teaspoon of yeast and mix
until the yeast is completely
dissolved in the water.
7. Step 2 – Pour 1/2 cup hydrogen
peroxide into the empty bottle. You’ll
see here that we have two bottles. The
bottle pictured on the left is being filled
with 3% hydrogen peroxide while the
bottle pictured on the right is filled with
6% hydrogen peroxide.
8. Step 3 – Add a few drops of food
coloring into the bottle. Take a
moment to make a few observations.
What happened when you added the
drops of food coloring?
9. Step 4 – Next, add a squirt of dish
soap into the bottle. Again, take a
moment observe what happened. Did
adding the dish soap appear to have
any effect on the liquid already in the
bottle?
10. Step 5 – Finally, pour the mixture of
water and yeast into the bottle. Watch
carefully and observe what happens.
Helpful Tip: You may need to gently
swirl the bottle in order to get the items
to completely combine. We had to do
that for the 6% hydrogen peroxide.
11. Sit back and watch what happens. Write
down your observations as you watch the
experiment. Can you describe what
happens when you add the water and yeast
mixture to the bottle. If you are using both
the 3% and the 6% hydrogen peroxide, is
there a difference between what happens?
12. WHAT'S GOING ON
Hydrogen peroxide normally decomposes
(breaks down into separate elements) and
combining it with detergent and yeast (a
catalyst) speeds up the process.
As the oxygen emanates from the reaction, it
creates bubbles. The detergent speeds up the
foaming. The reaction is "exothermic," meaning
it produces heat as well as steam.
Editor's Notes
It’s a disinfectant, cleaner and stain fighter —
Found in a brown bottle, hydrogen peroxide is an antiseptic liquid that in the past was typically used to treat cuts or other skin wounds, and kill germs. However, peroxide is often used in non-medical situations, including for cleaning, disinfecting and stain removal.
Hydrogen peroxide is water (H2O) with an extra oxygen molecule (H2O2).
“The extra oxygen molecule oxidizes, which is how peroxide gets its power,” says Dr. Beers. “This oxidation kills germs and bleaches color from porous surfaces like fabrics.”
When you use peroxide, go for medical-grade peroxide, which is 3% strength. That means it’s 97% water and 3% peroxide. “Medical grade is strong enough for household use,” says Dr. Beers
For this demonstration, it's advisable to wear disposable gloves and safety glasses. Since oxygen is involved in this reaction, do not perform this demonstration near an open flame. Also, the reaction is exothermic, producing a fair amount of heat, so do not lean over the graduated cylinder when the solutions are mixed. Leave your gloves on following the demonstration to aid with cleanup. The solution and foam may be rinsed down the drain with water.
Note: This step is optional, but adding the color adds a fun element to the experiment. You’ll see that we used a different color of food coloring for each bottle.
Note: This step is optional, but adding the color adds a fun element to the experiment. You’ll see that we used a different color of food coloring for each bottle.
