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#How to use waves x noise full

Compression is where the particles are more concentrated. The labels for rarefaction and compression are the wrong way round. OCR Gateway Science, GCE Physics, Paper B752, June 2015. Talking to each other, listening to blood flow, listening to musicīreaking down kidney stones, measuring blood flow, X-ray of bones, cooking foodĭescribe and explain what is wrong in the table and the diagram. One is a table and the other is a diagram. Sample question 1 - Foundation QuestionĪrnav collects two sets of information about sound and ultrasound.

#How to use waves x noise full

You do not usually need to include all of them to gain six marks, but you do need to write in full sentences, linking them logically and clearly. The answers shown here give marking points as bullet points. Remember that the topics covered in the first paper are assumed knowledge for the second paper, so questions in the second paper may need knowledge and understanding of those topics too. For example, a question about atoms could include ideas about atomic structure, isotopes, radiation and nuclear reactions. These questions bring together ideas from two or more topics. Six-mark questions may be synoptic questions.

'evaluate' - you must review information, including identifying strengths and weaknesses, and make a supported conclusion.

'devise' - you must plan or invent a procedure using your scientific knowledge and understanding.

'explain' - you must give reasons or explanations.

'describe' - you need to give an account but no reason.

You are likely to see command words such as:

maintain a sustained line of reasoning, rather than getting lost or bogged down.

write clearly, linking ideas in a logical way.

use appropriate scientific words and terms.

support explanations using scientific knowledge and understanding.

Six-mark questions are marked using a levels-based mark scheme because they are open ended. It is wise to plan your answer rather than rushing straight into it, otherwise you may stray away from the key points.

These require longer answers than the structured questions with fewer marks. Six-mark questions are extended open response questions. Waves in matter - Section B - Six-mark questions