c 88%, d 74%, e 50%, f 44%, g 29%.
for Higher

This includes scientific method and the way scientific knowledge develops.
Developing ideas and theories lies at the heart of science. 'How science works' focuses on the evidence to support or refute these ideas and theories. The evidence comes from the collection and creative interpretation of data, both of which need to be considered.
Consequently, in order to understand how science works, learners need skills such as practical collection of data, working safely, presenting scientific information; they need to understand the power of science to explain phenomena, the way understanding of science changes over time and the applications of contemporary scientific developments.
Here's the current information given by OCR the awarding body. They will also publish specific grade boundaries and raw scores for the January and June exams with the results.
As a rough guide, the Foundation tier papers are targeted at 70% of the marks at low demand (grades E, F, G, U) and 30% at standard demand (C and D). The Higher papers are targeted at 50% standard demand and 50% high demand (A*, A, B).
Anyone getting 75-80% on a Foundation paper should be on C level. On Higher papers 50% for C, and 75-80% for A is an again rough guide for attainment.
The exact boundaries will vary from paper to paper at awarding
S - specific, significant, stretching
M - measurable, meaningful, motivational
A - agreed upon, attainable, achievable, acceptable, action-oriented
R - realistic, relevant, reasonable, rewarding, results-oriented
T - time-based, timely, tangible, trackable
---------------------------------------------
Specific
Measurable
Agreed Upon
Realistic
Time Based