Lab Techniques. Measuring Distance Length = the distance between two points Always use a metric ruler! 1 2 34 5.

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Presentation transcript:

Lab Techniques

Measuring Distance Length = the distance between two points Always use a metric ruler!

How to read a metric ruler cm Value = Always estimate the last digit 1.67 cmmm What is the length indicated below?

Volume the amount of space something occupies Calculating volume of a cube L x W x H Check for Understanding: Determine the volume of a cube that is 3 cm x 2 cm x 5 cm Answer: 30 cm 3

Volume Of a liquid Use a Graduated Cylinder Read the bottom of the curve of liquid ( meniscus ) The volume of water in this cylinder is 6.62 mL

Check for Understanding What is the volume of the liquid in this cylinder? Answer: 52.7 mL

What is the volume of the rock? of an irregular object rock Volume Answer: 15 mL

Mass the amount matter in a substance measured  In grams (g)  Using either a triple beam balance or an electronic balance

How to use a triple beam balance Move the riders until the pointer is zeroed

How to use a triple beam balance Place the object to be massed on the scale. Re-zero the pointer

Mass add all the riders

CHECK FOR UNDERSTANDING What mass is indicated below? g

Temperature is how hot or cold something is Science uses Celcius not Farenheit

Reading a Celsius themometer What is the Celsius temperature on the thermometer to the right? answer: 12.1 C Measuring Time and Temp

Your Turn! What is the celcius temperature of the thermometer to the right? answer: 13.8 o C Temperature

Indicates how acidic or alkaline a solution is. pH

Fold the filter paper in half Fold in half again and tear off a small corner. Form into a cone with the torn side fitted against the funnel. Folding Filter Paper