UNIT 1 - PHYSICAL QUANTITIES AND SCIENTIFIC ACTIVITY
Key Words:
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Task guide
The tasks and questions on the Weebly will be coloured to represent the different style of questions that you will find in your exams. The task should be completed in your "Natural Sciences" GoogleDrive document.
Green - Stating scientific knowledge
Orange - Applying scientific knowledge and understanding
Red - Analysing and evaluating information
There will also be "extension" tasks for students who finish tasks quickly! Also look out for links to interactive resources and videos.
The tasks and questions on the Weebly will be coloured to represent the different style of questions that you will find in your exams. The task should be completed in your "Natural Sciences" GoogleDrive document.
Green - Stating scientific knowledge
Orange - Applying scientific knowledge and understanding
Red - Analysing and evaluating information
There will also be "extension" tasks for students who finish tasks quickly! Also look out for links to interactive resources and videos.
Matter, Measurements and Units
(EETimes, 2015)
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This is a copy of THE kilogram . It is kept under two bell jars, so the mass never changes and it can be used as the standard kilogram
It is made of a platinum (90%) - iridium (10%) alloy, 'Le Grande K' the original is kept in Sèvres, France. Watch this video |
In Spain we have exact copies of 'Le Grande K' numbers 24 and 3, in the CEM (Centro Español de Metrologia in Madrid)
The only problem is as the video states; 'Le Grande K' does not have a mass of 1 kilogram anymore
The only problem is as the video states; 'Le Grande K' does not have a mass of 1 kilogram anymore
TASK 1a
- Why is it important to have agreed upon standards of measurements?
- The kilogram measures mass, the 'stuff' we are made of. What other quatitites do we need to measure with agreed upon standards. Try to complete this table in your class paper notebook or in your NSD - Do not forget the references! (TIP: you can'select-all' (CTRL-A), copy (CTRL-C) and paste (CTRL-V) the table, or create a new one)
TASK 1b.
In your NSD, or in your class paper notebook answer the following questions
In your NSD, or in your class paper notebook answer the following questions
- What is the difference between 'fundamental' and a 'derived' unit? Give an example of each)
- What is the definition of a second?
- What is this? (Copy the image then search for it) We don't use this as the definition anymore, what is the definition for this quantity and unit?
where did this image come from?
Converting Units
Converting in metric units is easy. You have seen this before:
(HubPages, 2015)
Scientific Notation
A quick way to write really, really big or really, really small numbers..
To save time when writing we can use powers of 10 to create short versions of long numbers.
To save time when writing we can use powers of 10 to create short versions of long numbers.
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Rules for scientific notation
To be proper scientific notation you must write
* a number between 1 and 10
* multiplied by a power of 10
To be proper scientific notation you must write
* a number between 1 and 10
* multiplied by a power of 10
REFERENCES
BBC,. (2015). The Kilo Master, Mass and Moles, Precision: The Measure of All Things - BBC Four. Retrieved 30 June 2015, from http://www.bbc.co.uk/programmes/p01b8sj5
Cem.es,. (2015). CEM | METROLOGIA | SISTEMA INTERNACIONAL DE UNIDADES. Retrieved 30 June 2015, from http://www.cem.es/cem/metrologia/sistema_internacional_de_unidades
HubPages,. (2015). Converting within the Metric System using the Metric Staircase. Retrieved 30 June 2015, from http://kthix10.hubpages.com/hub/Converting-within-the-Metric-System-using-the-Metric-Staircase
EETimes,. (2015). Goodbye, Fundamental Kilogram & Ampere | EE Times. Retrieved 29 June 2015, from http://www.eetimes.com/author.asp?section_id=36&doc_id=1323806
Cem.es,. (2015). CEM | METROLOGIA | SISTEMA INTERNACIONAL DE UNIDADES. Retrieved 30 June 2015, from http://www.cem.es/cem/metrologia/sistema_internacional_de_unidades
HubPages,. (2015). Converting within the Metric System using the Metric Staircase. Retrieved 30 June 2015, from http://kthix10.hubpages.com/hub/Converting-within-the-Metric-System-using-the-Metric-Staircase
EETimes,. (2015). Goodbye, Fundamental Kilogram & Ampere | EE Times. Retrieved 29 June 2015, from http://www.eetimes.com/author.asp?section_id=36&doc_id=1323806