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Northern IrelandLife & Health SciencesQuick questions
Experimental Techniques (AS 1)
Quick questions on Experimental Techniques: the AS 1 practical portfolio - CCEA Life and Health Sciences
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What are vague evaluations?Show answer
"Be more accurate" or "use better equipment" scores nothing. Name the apparatus, the variable to control more tightly, or the specific source of error.
What is q1?Show answer
Distinguish between the reliability and the validity of an investigation. [2 marks]
What is q2?Show answer
State one source of random error and one source of systematic error in a titration. [2 marks]
What is q3?Show answer
A balance has a resolution of 0.01 grams and a reading is 2.50 grams. Calculate the percentage uncertainty in this reading. [2 marks]
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