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Combined Science B Revision Package
This package contains Revision papers with complete marking schemes well explained for exam preparations and to fit the current examination settings.
[ Mehr anzeigen ]This package contains Revision papers with complete marking schemes well explained for exam preparations and to fit the current examination settings.
[ Mehr anzeigen ]2 
© OCR 2023 
Chemical Bacteria in the gut compete 
against pathogens 
Microbial Skin stops pathogens 
entering the body 
Physical Stomach acid 
destroys pathogens 
1 Some bacteria are pathogens that cause diseases. 
(a) Our blood contains white blood cells. They help protect us against pathogens....
Vorschau 4 aus 59 Seiten
In den Einkaufswagen2 
© OCR 2023 
Chemical Bacteria in the gut compete 
against pathogens 
Microbial Skin stops pathogens 
entering the body 
Physical Stomach acid 
destroys pathogens 
1 Some bacteria are pathogens that cause diseases. 
(a) Our blood contains white blood cells. They help protect us against pathogens....
2 
© OCR 2023 
1 The diagram shows part of Mendeleev’s Periodic Table. 
B 
11 
C 
12 
N 
14 
O 
16 
F 
19 
Al 
27 
Si 
28 
P 
31 
S 
32 
Cl 
35.5 
As 
75 
Se 
79 
Br 
80 
In 
115 
Sn 
119 
Sb 
122 
Te 
128 
I 
127 
(a) Give the symbols of the two elements shown in the diagram which are not in ord...
Vorschau 4 aus 57 Seiten
In den Einkaufswagen2 
© OCR 2023 
1 The diagram shows part of Mendeleev’s Periodic Table. 
B 
11 
C 
12 
N 
14 
O 
16 
F 
19 
Al 
27 
Si 
28 
P 
31 
S 
32 
Cl 
35.5 
As 
75 
Se 
79 
Br 
80 
In 
115 
Sn 
119 
Sb 
122 
Te 
128 
I 
127 
(a) Give the symbols of the two elements shown in the diagram which are not in ord...
2 
© OCR 2023 
ring 
ring 
1 Ling has a torch with a filament lamp. 
(a) What is the correct circuit symbol for a filament lamp? 
Put a around the correct option. 
[1] 
(b) The torch is not working. Ling makes this circuit to test components. 
Ammeter 
Crocodile clip 
A 
B 
Crocodile clip 
Battery ...
Vorschau 4 aus 53 Seiten
In den Einkaufswagen2 
© OCR 2023 
ring 
ring 
1 Ling has a torch with a filament lamp. 
(a) What is the correct circuit symbol for a filament lamp? 
Put a around the correct option. 
[1] 
(b) The torch is not working. Ling makes this circuit to test components. 
Ammeter 
Crocodile clip 
A 
B 
Crocodile clip 
Battery ...
2 
© OCR 2023 
Stomach acid Clots the blood to prevent 
pathogens from entering cuts 
Skin Produces antibodies, or ingests 
and digests pathogens 
Platelet Barrier that prevents pathogens 
from entering the body 
White blood cell Can kill pathogens and stop 
them from reproducing 
1 Pathogens c...
Vorschau 4 aus 52 Seiten
In den Einkaufswagen2 
© OCR 2023 
Stomach acid Clots the blood to prevent 
pathogens from entering cuts 
Skin Produces antibodies, or ingests 
and digests pathogens 
Platelet Barrier that prevents pathogens 
from entering the body 
White blood cell Can kill pathogens and stop 
them from reproducing 
1 Pathogens c...
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 ...
Vorschau 4 aus 55 Seiten
In den EinkaufswagenA 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 ...
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. 
....
Vorschau 4 aus 51 Seiten
In den EinkaufswagenThe 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. 
....
Two students are doing an experiment to investigate reaction times. The diagram shows their 
experiment. 
Tester 
Participant 
(a) The statements outline the method used. They are not in the correct order. 
(i) Write the letters in the boxes to show the correct order of the statements. 
The first o...
Vorschau 4 aus 50 Seiten
In den EinkaufswagenTwo students are doing an experiment to investigate reaction times. The diagram shows their 
experiment. 
Tester 
Participant 
(a) The statements outline the method used. They are not in the correct order. 
(i) Write the letters in the boxes to show the correct order of the statements. 
The first o...
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