AQA GCSE Chemistry - Paper 2 issues And options

AQA GCSE Chemistry Paper 2 QUESTION: How do you measure the rate of a reaction? ANSWER: By measuring the quantity of a reactant used or the quantity of product formed over time QUESTION: What is the equation for calculating the mean rate of a reaction by measuring the amount of reactant used? ANSWER: Mean rate of reaction = quantity of reactant used/time taken

AQA GCSE CHEMISTRY 8462/1H Paper 1 Higher Tier June 2022 FINAL MARK SCHEME GCSE CHEMISTRY 8462/1H Paper 1 Higher Tier Mark scheme Jan 2022 Version: 1.0 Final Mark Scheme *206G8462/1H/MS* MARK SCHEME – GCSE CHEMISTRY – 8462/1H – JUNE 2020 2 Mark schemes are prepared by the Lead Assessment Writer and considered, together with the relevant questions, by a panel of subject teachers. This mark scheme includes any amendments made at the standardisation events which all associates ...

What is homeostasis? Homeostasis is the maintenance of a constant internal environment in order to maintain optimum conditions for enzyme and cellular function. Give examples of conditions maintained by homeostasis in the body ● Blood glucose concentration ● Body temperature ● Water levels What two types of responses are used in body control systems? Nervous and chemical What three components do all control systems have? ● Receptors ● Coordination centres

AQA GCSE Chemistry Paper 2 QUESTION: How would you describe the pH of carbon dioxide ANSWER: slightly acidic QUESTION: Why is it bad for plastic bags to be burned ANSWER: Release toxic gases that are bad for human health and release greenhouse gases that harm the environment

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AQA GCSE MATHEMATICS Foundation TiernPaper 3 Calculator

Information to Examiners 1. General The mark scheme for each question shows: • the marks available for each part of the question • the total marks available for the question • the typical answer or answers which are expected • extra information to help the Examiner make his or her judgement • the Assessment Objectives, level of demand and specification content that each question is intended to cover. The extra information is aligned to the appropriate answer in the left-hand p...

F Tuesday 19 May 2020 Morning Time allowed: 1 hour 30 minutes Materials For this paper you must have: mathematical instruments. You must not use a calculator. Instructions • Use black ink or black ball-point pen. Draw diagrams in pencil. • Fill in the boxes at the top of this page. • Answer all questions. • You must answer the questions in the spaces provided. Do not write outside the box around each page or on blank pages. • If you need extra space for your answer(s), us...

1.1 Plants move mineral ions: • from a low concentration in the soil • to a high concentration in the root cells. What process do plants use to move these minerals ions into root cells? [1 mark] Tick one box. Active transport Diffusion Evaporation Osmosis - ANSWER-Active Transport 1.2 Describe how water moves from roots to the leaves - ANSWER-by transpiration stream / pull in xylem 1.3 Plants lose water through the stomata in the leaves. The epidermis can be peeled from a ...