Twent - Study guides, Class notes & Summaries
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OCR 2023 GCSE Physics B Twenty First Century Science J259/03: Breadth in physics (Higher Tier) Question Paper & Mark Scheme (Merged
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2 
© OCR 2023 
ring 
1 The picture shows a child on a slide. The child’s hair is standing on end due to static electricity. 
(a) Suggest what has happened to cause the child’s hair to stand on end. 
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OCR 2023 GCSE Biology B Twenty First Century Science J257/03: Breadth in Biology (Higher Tier) Question Paper & Mark Scheme (Merged
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2 
© OCR 2023 
1 (a) (i) Complete the table to compare cellular aerobic and anaerobic respiration in humans. 
Tick () the correct boxes in each row. 
[3] 
(ii) Which statement about respiration is correct? 
Tick () one box. 
Aerobic respiration produces more ATP than anaerobic respiration. 
Anaerobic respiration produces more ATP than aerobic respiration. 
Both aerobic and anaerobic respiration produce the same amount of ATP. 
Neither aerobic or anaerobic respiration produces ATP. 
[1] 
(b) H...
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OCR 2023 GCSE Combined Science B Twenty First Century Science J260/06: Chemistry (Higher Tier) Question Paper & Mark Scheme (Merged
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2 
© OCR 2023 
Incomplete combustion 
of fossil fuels 
1 The combustion of fossil fuels for energy produces harmful substances. 
(a) (i) Draw lines to connect each harmful substance with the description of its major source. 
Harmful 
substance 
Major source 
[2] 
(ii) Explain one problem caused by increased amounts of sulfur dioxide in the atmosphere. 
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OCR 2023 GCSE CHEMISTRY B TWENTY FIRST CENTURY SCIENCE J258/04: DEPTH IN CHEMISTRY (HIGHER TIER) QUESTION PAPER & MARK SCHEME (MERGED
- Exam (elaborations) • 53 pages • 2024
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2 
© OCR 2023 
Solid sphere 
Dalton’s model Modern model 
1 Scientists use models to represent atoms. These models have changed over time. 
Dalton’s model and a modern model of an atom are shown in the diagrams. 
(a) Give two differences between the modern model and Dalton’s model. 
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Eduqas A Level Music AOSE: Into the Twentieth Century annotated scores
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Fully annotated scores of both Poulenc's Trio for Oboe, Bassoon, and Piano, and Debussy's Nuages.
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OCR 2023 GCSE Physics B Twenty First Century Science J259/04: Depth in physics (Higher Tier) Question Paper & Mark Scheme (Merged)
- Exam (elaborations) • 49 pages • 2024
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2 
© OCR 2023 
1 A student investigates the path of light passing through a triangular glass prism. 
A narrow beam of white light is directed at the prism with an angle of incidence equal to 40°. The 
student observes a spectrum of different coloured light. 
Narrow 
beam of 
white light 
Spectrum of 
coloured light 
The two-dimensional diagram shows a narrow beam of white light directed at the side of a prism. 
A line showing the path of a ray of blue light passing through the prism is pa...
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OCR 2023 GCSE Combined Science B Twenty First Century Science J260/05: Biology (Higher Tier) Question Paper & Mark Scheme (Merged
- Exam (elaborations) • 55 pages • 2024
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2 
© OCR 2023 
Part A Eyepiece lens 
Part B Objective lens 
Part C Stage 
1 A doctor uses a light microscope to look at the chromosomes in human body cells. 
(a) The microscope is shown in the diagram. 
Fine focus 
Part A 
Part B 
Part C 
Coarse focus 
Mirror 
(i) Draw lines to connect each part of the microscope with its correct name. 
Part Name 
[1] 
(ii) The doctor uses steps A to D to look at the cells on a slide. 
The steps are not in the correct order. 
A Turn the coarse focus until the i...
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OCR 2023 GCSE Physics B Twenty First Century Science J259/02: Depth in physics (Foundation Tier) Question Paper & Mark Scheme (Merged
- Exam (elaborations) • 59 pages • 2024
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2 
© OCR 2023 
Microwave Sun beds 
Ultraviolet Cooking food 
X-rays Sterilising surgical instruments 
Gamma rays Looking for broken bones 
1 Draw lines to connect each part of the electromagnetic spectrum to its use. 
Electromagnetic spectrum Use 
[3] 
13 
© OCR 2023 Turn over 
BLANK PAGE 
PLEASE DO NOT WRITE ON THIS PAGE 
4 
© OCR 2023 
2 Sam is making measurements to calculate the density of a rubber bung. 
(a) Which piece of apparatus does Sam use to measure the mass of the bung? 
Tick () ...
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OCR GCSE Chemistry B Paper 4 Higher tier Twenty First Century Science (J258/04) Mark Scheme for June 2023
- Exam (elaborations) • 27 pages • 2023
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GCSE 
 
Chemisty B Twenty First Century Science 
 
J258/04: Depth in Chemistry (Higher Tier) 
 
General Certificate of Secondary Education 
 
 
Mark Scheme for June 2023
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OCR GCSE Chemistry B Paper 1 Foundation tier Twenty First Century Science (J258/01) Mark Scheme for June 2023
- Exam (elaborations) • 25 pages • 2023
- Available in package deal
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GCSE 
 
Chemisty B Twenty First Century Science 
 
: Breadth in Chemistry (Foundation Tier) 
 
General Certificate of Secondary Education 
 
 
Mark Scheme for June 2023
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