Metric Scientific Measurement All images used are copyright

Metric Scientific Measurement All images used are copyright free!

Standards we all need standards

Physical Quantity n Something you can measure PHYSICAL QUANTITES ZEN STUFF

1. How long is this pencil? ___ cm ___ mm 2. What is the width of this dollar bill? _____ mm 3. What is the height of this dollar bill? _____ mm 4. What is the surface area of this dollar bill? _____ mm 2

5. How wide is this penny? 6. What is the name for the ruler shown above? 7. Excluding the tail, how long is this lab rat?

8. How long is this fish? 9. Stan ordered this safe from Acme Safe Co. He has a lot to store in it and needs to know the volume. The dimensions are 1. 5 m Width, 1 m Length, and 1. 6 m Height. Will this safe hold his 1. 44 m 3 of valuables? Show your work. 10. What unit would probably be best for measuring the thickness of a penny? 11. What unit would you use to measure a small paper clip?

Measurement n Measurement is giving a physical quantity a number or VALUE n SI Units mean we can all use same number

Expt. Measurement Aim - Learn to use the measuring apparatus n Apparatus – Meter Rule, Opisometer, Vernier callipers and Trundle Wheel. n Measured Height of Chair Width of Desk Dimensions of Block Thickness of book Distance Cork to Tralee Length of classroom Apparatus Units Result

Error n To measure something accurately you need the right…. . n ……TOOL So H/W complete table Thing to measure Good TOOL Silly TOOL

Always read the base of the meniscus when taking measurements. Here is an illustration to help you understand this process.

12. What is the reading on the graduated cylinder to the left? 13. What is the reading on the graduated cylinder to the right? VOLUME BY DISPLACEMENT 14. To measure the volume of irregular objects, like a penny we use this method. We start with a volume of ___ m. L and end with a volume of ___ m. L after placing the penny into the graduated cylinder. This means the volume of the penny is ______ m. L.

19. What volume is contained in this beaker? 20. What volume is shown in this conical flask?

THERMOMETERS 15. What is the reading on thermometer to the left? 16. What is the reading on thermometer to the right? KELVIN To really use metrics, we have to convert these readings to Kelvin by adding 273. 17. What is the reading to the left in Kelvin? 18. What is the reading to the right in Kelvin?

Summary - Metric Measure Units Density • Ruler • Opisometer • Vernier Callipers • Measuring Cylinder • Meters • Litres • Kilogrammes • Mass/Volume • g/ml

H/W Copy and complete n Google Classroom n

Expt. Write up n n n n Date and Title Aim – Explanation of title Apparatus – Full names Group- Who you did it with Diagram with all parts labelled Method – Numbered and in clear stages. ‘We first… Results – Table or observations Object Mass/g Volume/cm 3 Density g/cm 3