Is a quantity the same as a unit? Classify the terms below as quantities or units. Then group together the units according to the quantity they measure. • Length • Minute • Volume • Second • Kilometre • Time • Metre • Mass • Tonne • Litre • Gram • Cubic metre Can you express the same length in two different units? And the same speed? Give an example. What data can you get from a graph that shows the distance someone travelled over a given time? WORK WITH THE IMAGE We use instruments to measure quantities. The images on the right show a fitness tracker and some mobile phone apps. Look at the graph. What period of time does it show? What quantities are represented on the axes? What units are used? What was the average speed of this person between 6 pm and 7 pm? When did this person take no steps? Is it possible to know the distance this person travelled that day? Make an estimate. L E T ' S G E T S TA R T E D Take act ion "The Sustainable Development Goals (SDGs) are a universal call to action to end poverty, protect the planet and improve the lives and prospects of ever yone, ever ywhere. The 17 Goals were adopted by all UN Member States in 2015, as part of the 2030 Agenda for Sustainable Development." The UN’s 2030 Agenda promotes responsible research and innovation. It is an opportunity for science to work with and for society. Make a start by studying and applying the scientific method in this unit! IN THIS UNIT… Experimental sciences The scientific method Technological applications Measurement Laboratory work Distance walked W N o v Y 1.3 km 2.0 1.5 1.0 0.5 0.0 Oct Oct 29 Oct 18 -19 9
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