from The Open University
Alternatively you can skip the navigation by pressing 'Enter'.
Wastemen: One Man's Rubbish...Wednesday, 6th May 2015 23:50 - BBC TwoThe value of waste has never been higher - but it's not just financial value; the Wastemen are aware of the emotional... Read more: Wastemen: One Man's Rubbish, One Man's Treasure
Thinking Allowed: Gentrification and division of domestic labourAvailable until Saturday, 30th April 2016 14:00Dr Melissa Butcher, lecturer in Human Geography at The Open University joins this episode of Thinking Allowed to... Read more: Thinking Allowed: Gentrification and division of domestic labour
Can animals predict earthquakes - and how could they alert us?It might sound like something out of a Lassie film - animals warning of imminent disasters. But... Read more: Can animals predict earthquakes - and how could they alert us?
Take the photographic memory testCan you capture scenes just by looking at them? Find out with our photographic memory test. Launch now: Take the photographic memory test
Facilitating learning in practice[BETA ] Are you interested in mentorship or looking to develop your mentorship skills? In... Try: Facilitating learning in practice now
Succeed with maths – Part 1[BETA] If you feel that maths is a mystery that you want to unravel then this short 8-week course... Try: Succeed with maths – Part 1 now
Water for life
Atoms, elements and molecules are the building blocks of everything that makes up our...
Atoms, elements and molecules are the building blocks of everything that makes up our world, including ourselves. In this unit you will learn the basic chemistry of how these components work together, starting with a chemical compound we are all very familiar with – water.
By the end of this unit you should be able to:
- read data presented in tables;
- use scientific notation to express both large and small quantities;
- appreciate why chemists use different models to represent molecules;
- identify the number and type(s) of atom present in a molecule from its chemical formula;
- identify the reactants and products of a reaction in a chemical equation;
- read and write using chemical notation;
- write a balanced chemical equation to represent a chemical reaction;
- access the Drinking Water Inspectorate (DWI) website and retrieve information about ions in drinking water.
- Current section: Introduction
- Learning outcomes
- 1 The power of water
- 2 Earth's store of water
- 2.1 Where water occurs and how we measure it
- 2.2 Going up: using scientific notation for large numbers
- 2.3 The study of a raindrop
- 2.4 Going down: using scientific notation for small numbers
- 2.5 What is water made of?
- 2.6 Models of a water molecule
- 2.7 The ‘salt’ in seawater
- 3 What are compounds?
- 4 Inside the atom
- 5 Molecules and covalent bonding
- 6 Chemical language
- 7 Ions and ionic bonding
- 8 Water and its impurities
- 9 Unit summary
- Next steps
Water for life
This unit is an introduction to chemistry concepts, using water as the main illustration. Much of the unit is devoted to exploring the smallest water particle – a water molecule – what it is and how it gives rise to the particular properties of water. The unit also explains powers of ten and scientific notation, which are a convenient way of expressing both very large and very small numbers. It is a good introduction to science.
This material is from our archive and is an adapted extract from Science starts here (S154), which is no longer taught by The Open University. If you want to study formally with us, you may wish to explore other courses we offer in this.
This is an extract from an Open University course which is no longer available to new students. If you found this interesting you could explore more free Environmental Studies course units or view the range of currently available OU Environmental Studies courses.