Mathematical Skills and Lab Safety Procedures (Grade 10 NSC Matric Life Sciences): Flashcards

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Mathematical Skills and Lab Safety Procedures
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Formula: true size from scale

(measuredimesscalevalue)divscalelength(measured imes scale value) div scale length

Formula: average (mean)

sumofvaluesdivnumberofvaluessum of values div number of values

Formula: percentage

(partdivtotal)imes100(part div total) imes 100

How many μm in 1 mm?

1000 μm

How many nm in 1 μm?

1000 nm

What neutralises acid spills?

Sodium bicarbonate

Direction to point test tube when heating

Away from yourself and others

When to wear safety goggles

Working with chemicals, heating, or when splashing might occur

Equipment for hazardous chemicals/gases

Fume cupboard

What to do if you cut yourself in lab

Call your teacher immediately

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