Curated Video
Los seres vivos
Algunos robots son muy parecidos a los seres humanos, pero ¿qué le da vida a las cosas?
Twig - Los procesos de la vida - Los procesos vitales - Los seres vivos
Claves de aprendizaje
Todos los seres vivos necesitan nutrición y...
Curated Video
¿Por qué la orina es amarilla?
La orina es un producto de desecho producido por los humanos y los animales. ¿Por qué es amarilla?
Twig - Los procesos de la vida - Los procesos vitales - La excreción
Claves de aprendizaje
La orina es producida por los...
Curated Video
Sigue el aliento humano
Sigue el viaje de la respiración humana.
Twig - Los procesos de la vida - Los sistemas corporales - El sistema respiratorio
Claves de aprendizaje
Cuando inhalamos, el aire viaja por la tráquea hacia los pulmones.
En los...
Curated Video
¿Qué es el aire?
Probablemente no te percates mucho, pero el aire está en todas partes y es esencial para la vida.
Twig - Los procesos de los materiales - Sólidos, líquidos y gases - Características del aire
Claves de aprendizaje
El aire es...
Curated Video
Effects of Smoking
We test the effects of smoking by drawing first air and then cigarette smoke through apparatus that contains mineral wool and universal indicator. The air has no effect, but the smoke discolours the wool and changes the colour of the...
Curated Video
Cloud in a Bottle
We create a cloud in a bottle using warm water and smoke. Some warm water is placed in a plastic bottle and then some smoke is drawn in using a glowing splint. The bottle is sealed and then squeezed and released. The change in pressure...
Curated Video
Burning Bubbles
We investigate the properties of two types of gas bubbles: methane gas bubbles and bubbles of the gas we breathe out. The air-filled bubbles sink and we are unable to set them alight, while the methane bubbles float upwards and are...
Curated Video
Screaming Jelly Baby
We add a jelly baby to a boiling tube containing potassium chlorate. When the chemicals react, gas is rapidly produced. The screaming sound is created as the gas escapes from the tube. The sweet burns brightly as the reaction occurs....
Curated Video
Acidification of Water
We use a drinking straw, some water and universal indicator to show that breathing out creates acid. Universal indicator is added to the water to show its pH value. When we blow into the water the indicator changes colour showing that...
Curated Video
Aerobic Respiration: Observing Oxygen Use in Maggots
We use maggots to let us observe aerobic respiration. The maggots are placed over sodium hydroxide in a specimen tube. A bung and delivery tube are attached to the specimen tube that feed into a boiling tube of coloured water. In the...
Curated Video
Cola Volcano
We add mints to diet cola in order to produce a fountain. When we add the mints to the diet cola, the porous surface of the mint causes the carbon dioxide trapped within the drink to be released rapidly, resulting in a cola volcano....
Curated Video
Dry Ice and Magnesium
We use magnesium and blocks of dry ice to show how a redox reaction occurs. A cavity in a block of dry ice is filled with coils of magnesium ribbon, which are set alight. A second block is then placed on top, but instead of this putting...
Curated Video
Inflating Glove
We inflate a rubber glove using the gas produced during a neutralisation reaction. Bicarbonate of soda is added to vinegar in a beaker covered by a rubber glove and it expands. The gas is used to extinguish a flame, showing that it is...
Curated Video
Fire Extinguisher Sublimation
We release carbon dioxide from a fire extinguisher against a dark cloth to see what happens. The expanding gas cools as it leaves the extinguisher, forming a visible dry ice solid on the cloth. As it warms, the carbon dioxide vanishes...
Curated Video
What is air?
You may not think about it much, but air is everywhere and it is essential to life. Material processes - Solids, liquids and gases - Characteristics of air Learning Points Air is a mixture of gases including nitrogen and oxygen. Air...
Curated Video
Why is urine yellow?
Urine is a waste product produced by humans and animals. Why is it yellow? Life processes - Living processes - Excretion Learning Points Urine is produced by the kidneys and is excreted through the bladder. Urine is mostly water, excess...
Curated Video
What is excretion?
All living things need to excrete, but what do we mean by this? Life processes - Living processes - Excretion Learning Points Excretion is the process of removing waste products. Waste products need to be removed from the body, otherwise...
Curated Video
Living things
Some robots can be very lifelike but what makes something alive? Life processes - Living processes - Living things Learning Points All living things need nutrition and energy. All living things react to their environment, excrete waste...
Curated Video
Science Experiment: Homemade Fire Extinguisher
When we are mixing vinegar and baking soda, we get a foamy reaction that produces carbon dioxide. You can't see it, but we can actually fill a glass with it because carbon dioxide is heavier than air. When I pour concentrated carbon...
Wonderscape
The Greenhouse Effect: Unraveling the Impact on Global Climate
This video explores the greenhouse effect and its significant role in global warming. It explains how greenhouse gases, like carbon dioxide and methane, trap heat in the Earth's atmosphere, leading to a rise in global temperatures. The...
Curated Video
GCSE Chemistry - Evolution of the Atmosphere #67
In this video, we'll look at: - What the early atmosphere was like on earth - How that atmosphere changed to be suitable for life - The processes responsible for features of the earth we see today
Curated Video
Válvula de Expansión Electrónica.
En este video vamos a ver la válvula de expansión electrónica EEV para aprender cómo funcionan y dónde se utilizan. Aprendemos el ciclo básico de refrigeración, el compresor, el condensador, el evaporador y los diferentes tipos de...
Curated Video
Controlador del Evaporador - EKE400 Refrigeración Industrial Ingeniería Industrial
Control del evaporador en la ingeniería de refrigeración industrial. En este vídeo vemos cómo se controlan los evaporadores en los sistemas de refrigeración industrial, incluyendo el desescarche, la refrigeración, la bandeja de goteo,...
Curated Video
How Multi ejectors work - working principle CO2 refrigeration
How Multi Ejectors work in C02 refrigeration system. In this video we'll be discussing how a multi ejector works in co2 transcritical refrigeration systems. We'll cover this topic using 3D models to help you learn HVAC.