Measurement

What kinds of things can you measure? Make a list. Height Weight (Mass) Distance …………. ……………… ………………… Are any things on your list similar to each other, can you group them??

Important measurements include: Time - ….. Length - Distance between two points Area - Amount of surface Volume - Amount of space an object takes up Mass - Amount of matter in an object How hot or cold something is Temperature -

Standard we use for comparing measurements Units What are they?? Standard we use for comparing measurements

Cubit: elbow to tip of finger Span: thumb to little finger Long, long ago… Length: Cubit: elbow to tip of finger Span: thumb to little finger Why do some people use miles and inches and other people use centimetres and kilometres??

Standard Internationale Units Standard Internationale S.I. unit S.I. is the scientific unit used by scientists and engineers across the world

What instrument do we use to measure temperature? Thermometer

What is the unit for temperature? degree celsius

How do you measure mass? Mass is measured in ________________ Kilograms (kg)

What unit do we use to measure time? seconds minutes hours seconds S.I. unit for time is __________

Length is measured in __________ metres (m). How can we measure length? Ruler or metre stick Opisometer Trundle wheel Callipers Vernier callipers Length is measured in __________ metres (m).

What is the unit for length? metres Kilometres (km) = 1000m Metre (m)= 100cm Centimetre (cm) = 10 millimetres (mm)

What units do we use for measuring very long distances? kilometre

What do we use to accurately measure very short distances? Callipers

Remember! Units m kg Measurement Length - Distance between two points Time - Temperature - Mass - Amount of matter in an object kg

Question to think about! What would it be like to live in a world without measurement?

What do we use to measure curved lines opisometer

How can we measure area? Regular shape Irregular shape Use a ruler to measure the length of each side. Multiply one side by the other to find the area. Area = l x b b Irregular shape You must know the area of each square on the graph paper. Use graph paper. Draw around the object and then count the squares inside the lines. Area is measured in__________________ metres squared (m2).

How can we measure volume? b Regular object Use a ruler to measure length, breath and height. Multiply length by breath by height. h (v = l x b x h) Irregular object or liquid Use a measuring cylinder. How? Volume is measured in ________________ metres cubed (m3).

Remember! Units m m2 m3 kg Measurement Length - Distance between two points m Area - Amount of surface m2 Volume - Amount of space an object takes up m3 Mass - Amount of matter in an object kg

1. What do we use to find the volume of an irregular solid? Review Questions 1. What do we use to find the volume of an irregular solid? HINT 2. What do we use to find the mass of an object? HINT