451 search results
How the atmosphere sustains life on Earth
Science, Maths & Technology

How the atmosphere sustains life on Earth

...solid ice, liquid water and water vapour), at various locations on the surface of the planet, is a unique feature in the present-day Solar System. Water occurs throughout the Solar System, but on no other planet or moon can liquid water persist at the surface without freezing or boiling. The heat engine It is interesting to compare temperatures on the Earth and the...
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Article 20 mins
Effects of pollutants on the aquatic environment
Nature & Environment

Effects of pollutants on the aquatic environment

...solids immiscible liquids discharges that result in changes to the temperature or flow rate of the receiving water substances that impart a taste, odour or colour to the water...Effects of pollutants on the aquatic environment: 6.1 Suspended solids - Various industries produce suspended material (or particulates) in their effluents, and this has several consequences. All...
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Level 3: Advanced 3 hrs
The world around us - Perfume
Health, Sports & Psychology

The world around us - Perfume

...liquid from a gland in its abdomen, which contains a small amount of the ketone muskone, a ring-like molecule that resembles civetone and creates the odour we know as musk. Both of these chemicals are nowadays produced synthetically. Find out more You can learn how the senses interact with the environment in The Open University course Signals and Perception: The Science...
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Article 5 mins
Olde dessert recipes
History & The Arts

Olde dessert recipes

...liquid into glasses, filling them up to about three-quarters. In the morning, carefully float the drained foam on top of the liquid and serve. Trifle From The Experienced English Housekeeper, Elizabeth Raffald (London 1769) By the middle of the 18th century, the trifle had become a complex confection of wine-soaked biscuit, topped with custard, syllabub and a scattering...
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Activity 5 mins
Health and safety in the laboratory and field
Science, Maths & Technology

Health and safety in the laboratory and field

...liquids and ionising radiation safety - 5.2.1 Cryogenic liquids There are a number of hazards associated with cryogenic liquids, the main one being that when accidentally released the liquid expands hugely to form a gas (600 times in the case of nitrogen). The formation of such a large volume of gas can lead to asphyxiation in confined areas. The other main hazard is cold...
View course Health and safety in the laboratory and field
Level 1: Introductory 1 hr
Review: Bisexuality: Identities, Politics and Theories by Surya Monro
Society, Politics & Law

Review: Bisexuality: Identities, Politics and Theories by Surya Monro

...solid theoretical introduction to the social study of bisexuality...Surya Monro is a prolific bisexual activist, researcher and writer, and her new book, Bisexuality: Identities, Politics and Theories, is a theoretical approach to the communities, identities, political and social organisations and relationships of bisexual-identified people, in particular those in the UK....
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Article 10 mins
How Do Batteries Work?
Science, Maths & Technology

How Do Batteries Work?

...solid, like a metal wire, electrons can move around fairly freely. We can therefore picture such a solid as consisting of a sea of negatively charged electrons moving randomly through a fixed array of positively charged ions. [ions] A fixed array of positively charged ions (red) surrounded by a 'gas' of negatively charged ions (blue) in an electrically conducting wire....
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Article 10 mins
Wild Weather Kitchen Experiments
Science, Maths & Technology

Wild Weather Kitchen Experiments

...liquid water and the planet would be a frozen desert. The atmosphere is dynamic and moves in response to the way that it is heated by the Sun. The way that the atmosphere moves is governed by the Earth’s gravity and rotation. This leads to the day-to-day changes that we experience on the surface, which we call weather. Life in different regions has adapted to the...
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Video 30 mins