1,806 search results
What chemical compounds might be present in drinking water?
Science, Maths & Technology

What chemical compounds might be present in drinking water?

...types, and is broken down during weathering by both physical and chemical degradation processes. Feldspar typically weathers as follows: [times times four KAlSi three cap o eight feldspar plus four CO two plus separator 22 cap h two cap o right arrow plus plus four cap k plus times times four HCO three minus ions plus times times Al four Si four cap o separator 10 left...
View course What chemical compounds might be present in drinking water?
Level 2: Intermediate 6 hrs
The athlete’s journey: transitions through sport Badge icon
Health, Sports & Psychology

The athlete’s journey: transitions through sport

...type questions you usually only get one attempt). If you get the answer right first time you will get more marks than for a correct answer the second or third time. Therefore, please be aware that for the two badge quizzes it is possible to get all the questions right but not score 50% and be eligible for the badge on that attempt. If one of your answers is incorrect you...
View course The athlete’s journey: transitions through sport
Level 2: Intermediate 24 hrs
Icy bodies: Europa and elsewhere
Science, Maths & Technology

Icy bodies: Europa and elsewhere

...types, showing relatively few impact craters but many signs that faulting, flooding and other resurfacing processes have acted to disrupt or bury any ancient heavily cratered terrains that may formerly have existed (Figure 11). Box 1: The Voyager project In 1977, NASA launched two probes named Voyager to explore the outer Solar System (Figure 9). Voyager 1 flew through...
View course Icy bodies: Europa and elsewhere
Level 2: Intermediate 17 hrs
Recording music and sound
History & The Arts

Recording music and sound

...types of microphones – directional and omnidirectional – the most common choice for live recordings is directional, as this gives you at least some ability to focus more on the performance and less on the audience. This choice might not eliminate incidental noises, but it can reduce their amplitude relative to the performance, and it will still pick up applause very...
View course Recording music and sound
Level 2: Intermediate 8 hrs
Doug Allan - Earth in Vision
Nature & Environment

Doug Allan - Earth in Vision

...type programme. On the other hand I think that broadcasters should be clever enough to make an important programme to appeal across a wide range of audience, to handle both BBC1 and BBC2 for example. These decisions about these extra programmes are made utterly coldly, commercially. If we mixed the environmental issue in with the main, blue-chip wildlife, that programme...
View video Doug Allan - Earth in Vision
Video 35 mins
Exploring Religion in London
History & The Arts

Exploring Religion in London

...types of Jew. You have Sephardic Jews, who are descended from those who escaped from the Spanish Inquisition, which are what we are. And you have Ashkenazi Jews who are more descended from Eastern European, Germany, Russia, Poland etc. This is a Sephardic Synagogue; the word Sephardi actually means ‘Spaniard’ in Hebrew. The word Synagogue actually means meeting room,...
View video Exploring Religion in London
Video 30 mins
Assessment in secondary mathematics
Education & Development

Assessment in secondary mathematics

...type (and in the conditions and circumstances of the test): no more and no less. Reliability questions whether a student’s performance on a given test changes (or not) depending on the particular questions that are set. Ideally, assessments should give every student optimal opportunity to demonstrate what they know. In practice, however, tests have been found to be...
View course Assessment in secondary mathematics
Level 3: Advanced 11 hrs
Race and Youth Policy: working with young people
Education & Development

Race and Youth Policy: working with young people

...de St Croix, 2011, p. 49–50). The young of this country are as passionate and idealistic as any before. Perhaps more passionate. They march against poverty, they set up online campaigns, they push their parents to recycle and they care deeply about climate change. But too many of our young people appear lost. Their lives lack shape or any sense of direction. So they...
View course Race and Youth Policy: working with young people
Level 3: Advanced 6 hrs